# Patent

## Title
Systems, methods and apparatus for determining whether a low battery condition exists in a remote control

## Abstract

Various embodiments of systems, methods and apparatus are provided for adjusting a low battery detection threshold in a remote control. An embodiment of a method includes determining a type of a battery powering a remote control of an entertainment device and determining a first low battery threshold for the battery based on the type of the battery. The first low battery threshold indicates a low battery condition of the remote control. Responsive to measuring a voltage of the battery, a determination is made regarding whether the voltage of the battery is below the low battery threshold. Responsive to determining that the voltage of the battery is below the first low battery threshold, a low battery message is transmitted to an entertainment device. The entertainment device utilizes the message to present an indicator to a user regarding the low battery condition of the remote control.

## Background
RELATED APPLICATIONS
This application is a continuation of application Ser. No. 12/104,291, entitled “Systems, Methods, and Apparatus for Adjusting a Low Battery Detection Threshold of a Remote Control,” filed Apr. 16, 2008 now U.S. Pat. No. 8,009,054, which is hereby incorporated by reference.


BACKGROUND
Many remote controls for entertainment devices include a feature that detects a low battery condition and alerts the user of the low battery condition. For example, a remote control for a satellite television receiver may detect that the battery powering the remote control only has 10% of its usable life left. The remote control may communicate the low battery condition to the satellite television receiver, and the receiver may present an indicator to a user regarding the low battery condition. Thus, the user may take action to replace the batteries to avoid experiencing a subsequent dead battery in the remote control.
The low battery condition is typically detected based on comparing a terminal voltage of the battery with a low battery threshold voltage. The usable life of the battery is directly correlated with a terminal voltage of the battery. A specified point on a voltage discharge curve indicates a remaining usable life of the battery. However, there are many different types of batteries, and each type of battery does not follow the same voltage discharge curve. For example, a terminal voltage of  ̃1.20 V may correspond to 10% of the remaining usable life of a nickel metal hydride (NiMH) battery, whereas a terminal voltage of  ̃1.05 V may correspond with the same remaining usable life of an alkaline battery. Because the batteries of a remote control may be replaced with either type of battery, the utilization of a single threshold value indicating a low battery condition often results in providing a user with little warning regarding dead batteries or prompting the user to replace the batteries more often than necessary. Thus, the user may become dissatisfied with the battery replacement indicators provided by the satellite television receiver.



BRIEF DESCRIPTION OF THE DRAWINGS
The same number represents the same element or same type of element in all drawings.
FIG. 1 illustrates an embodiment of an entertainment system.
FIG. 2 illustrates an embodiment of a remote control of the entertainment system of FIG. 1.
FIG. 3 illustrates an embodiment of a graph of the relationship between terminal voltage and time for alkaline and NiMH batteries.
FIG. 4 illustrates an embodiment of an entertainment device of FIG. 1.
FIG. 5 illustrates an embodiment of a screenshot including a warning message regarding the low battery condition.
FIG. 6 illustrates an embodiment of a screenshot including a battery type selection menu.
FIG. 7 illustrates an embodiment of a process for indicating a low battery condition in a remote control for an entertainment device.
FIG. 8 illustrates an embodiment of a process for adjusting a voltage threshold indicating an unsafe operating condition of a remote control based on a battery type.



DETAILED DESCRIPTION
The various embodiments described herein generally provide apparatus, systems and methods for indicating to a user a low battery condition of a remote control for an entertainment device. More particularly, the various embodiments described herein generally provide apparatus, systems and methods which facilitate determining an appropriate voltage threshold utilized to determine/define a low battery condition of the remote control based on a type of the battery utilized in the remote control. In short, the various embodiments described provide apparatus, systems and/or methods for adjusting a low battery threshold based on a type of battery utilized in a remote control.
FIG. 1 illustrates an embodiment of an entertainment system 100. The entertainment system 100 presents content to a user 108. In at least one embodiment, the content presented to the user 108 includes an audio/video stream, such as a television program, movie or other recorded content and the like. The entertainment system 100 includes an entertainment device 102, a presentation device 104 and a remote control 106. Each of these components is discussed in greater detail below. The entertainment system 100 may include other devices, components or elements not illustrated for the sake of brevity.
The entertainment device 102 is operable to receive content from one or more content sources (not shown in FIG. 1), and to present the received content to the user 108 on the associated presentation device 104. In at least one embodiment, the presentation device 104 is a display device (e.g., a television) configured to display content to the user 108. The entertainment device 102 may receive an audio/video stream in any format (e.g., analog or digital format), and output the audio/video stream for presentation by the presentation device 104. The entertainment device 102 may be further configured to display menus and other information that allow a user 108 to control the output of content by the entertainment device 102. In at least one embodiment, the entertainment device 102 is a set-top box (e.g., a satellite or cable television converter box), digital video recorder (DVR) or other similar device that processes and provides one or more audio and/or video output streams to the presentation device 104 for presentation to the user 108. In some embodiments, the entertainment device 102 and the presentation device 104 may be integrated as a device combining the functionality of a display device and a set-top box, digital video recorder (DVR) or the like.
The remote control 106 may comprise any system or apparatus configured to remotely control the output of content by the entertainment device 102. For example, the remote control 106 may communicate commands to the entertainment device 102 requesting to playback content, temporally move through content (e.g., fast-forward or reverse), adjust the volume, access electronic programming guides and the like. In some embodiments, the remote control 106 may additionally be configured to remotely control the presentation device 104. The remote control 106 may communicate with the entertainment device 102 and/or the presentation device 104 through any type of wireless communication medium, such as infrared (IR) signals or radio-frequency (RF) signals.
The remote control 106 is powered by one or more removable batteries. The terms “battery” and “batteries” will be used interchangeably herein. It is to be appreciated that the techniques described herein may be applied to remote controls powered by a single removable battery or multiple removable batteries. The removable batteries may be any type of battery, such as AA batteries or AAA batteries typically used to power consumer electronic devices, such as remote controls. Further, the removable batteries may comprise any type of battery typically used to power consumer electronic devices, such as alkaline batteries, nickel metal hydride (NiMH) batteries, nickel cadmium (NiCad) batteries or Lithium Ion batteries. The remote control 106 is configured to detect a low battery condition when the batteries have a specified usable life remaining, such that the entertainment system 100 may indicate the low battery condition to the user 108. Thus, the user 108 may replace the batteries powering the remote control 106 to avoid future interruptions to their viewing experience caused by dead batteries in the remote control 106.
For example, the entertainment system 100 may indicate to the user 108 when the remaining usable life of the batteries in the remote control 106 reaches 10% (e.g., a low battery condition). In at least one embodiment, the remote control 106 detects the existence of the low battery condition and transmits a low battery message to the entertainment device 102 regarding the low battery condition. Thus, the entertainment device 102 may include a message in the presentation stream output to the presentation device 104 responsive to the low battery message. For example, if the presentation stream is an audio/video stream, then the entertainment device 102 may insert a warning message or other type of indicator into the audio/video stream for display by the presentation device 104. The entertainment device 102 may also indicate the low battery condition using a low battery indicator (e.g., an-LED) on the exterior of the entertainment device 102.
In other embodiments, the remote control 106 may include an integrated presentation device, such as a display screen or speaker that is capable of presenting information to the user 108. Thus, the remote control 106 may be configured to communicate an indicator to the user 108 regarding the low battery condition without cooperative operation with the entertainment device 102. For example, the remote control 106 may present an indicator to the user 106 on an integrated display screen of the remote control 106 regarding the low battery message.
In at least one embodiment, the remote control 106 detects the low battery condition by measuring the voltage of the batteries powering the remote control and comparing the voltage against a pre-defined threshold. As described above, the user 108 may replace the batteries in the remote control with any type of appropriate battery, including alkaline batteries, NiMH batteries or NiCad batteries. Thus, if the remote control 106 utilizes a single low battery threshold to detect the existence of the low battery condition, then the entertainment system 100 may provide the user 108 with little warning regarding dead batteries or may prompt the user 108 to replace the batteries more often than necessary.
To avoid this problem, the remote control 106 is configured to determine the type of battery powering the remote control 106 and adjust the threshold utilized to detect the low battery condition accordingly. For example, the remote control 106 may be configured to differentiate between alkaline batteries, NiMH batteries or NiCad batteries. The remote control 106 may detect the type of battery (e.g., the battery chemistry) utilizing any appropriate detection technique. In at least one embodiment, the remote control 106 detects the battery type by measuring the initial voltage of the replacement batteries in the remote control 106. The voltage measurement detection technique is described in greater detail below.
In other embodiments, the remote control 106 includes a switch having multiple positions, with each position of the switch corresponding with a particular battery type (e.g., alkaline, NiMH or NiCad). For example, the switch may be disposed within the battery compartment of the remote control 106. Upon replacing the batteries in the remote control 106, the user 108 selects the appropriate position of the switch to designate the type of the battery that is powering the remote control 106. The remote control 106 thus may responsively adjust the threshold utilized to identify a low battery condition based upon the position of the switch. In another embodiment, the remote control 106 and the entertainment device 102 cooperatively operate to solicit user input from the user 108 identifying the type of the replacement batteries in the remote control responsive to the user 108 replacing the batteries. The solicitation of user input is described in greater detail below.
After identifying the type of batteries utilized in the remote control 106, the remote control 106 selects an appropriate threshold for identifying a low battery condition. The remote control 106 may then utilize the threshold to monitor for a low battery condition. In at least one embodiment, the remote control 106 monitors for a low battery condition while processing each user input entered by the user 108. In other words, as components of the remote control 106 draw power from the battery, the remote control 106 monitors the batteries to determine whether the terminal voltage is below the low battery threshold. If the terminal voltage is below the low battery threshold, then a low battery condition within the remote control 106 may exist.
FIG. 2 illustrates an embodiment of a remote control 106A of the entertainment system 100 of FIG. 1. FIG. 2 will be discussed in reference to the entertainment system 100 illustrated in FIG. 1. The remote control 106A includes a transmitter 202, a non-volatile memory 204, an input module 206, a low battery detection module 208, a battery 210 and a battery connector 212. Each of these components is discussed in greater detail below. The remote control may contain other devices, such as pointing devices (e.g., touchpads), not mentioned herein for brevity.
The input module 206 is operable for receiving user input from the user 108 (see FIG. 1). In at least one embodiment, the input module 206 is a keypad including a set of buttons. A user may utilize the keypad to input channel numbers, control the volume of the entertainment device 102 (see FIG. 1), navigate menus, manipulate the output of content by the entertainment device 102 and/or control other functions of the entertainment device 102 and/or the presentation device 104. The input module 206 further includes a processor operable to generate control commands for the entertainment device 102 (see FIG. 1) responsive to the user input. The control commands may be in the form of key codes that are compatible with the entertainment device 102 (see FIG. 1).
The transmitter 202 is operable for wirelessly communicating with the entertainment device 102 (see FIG. 1) and/or the presentation device 104. More particularly, the transmitter 202 is operable for transmitting a key code and/or command message corresponding with user input to the entertainment device 102 (see FIG. 1). The transmitter 202 may utilize any type of wireless protocol and wireless communication medium, including RF or IR key codes, to communicate with the entertainment device 102 (see FIG. 1) and/or the presentation device 104. In at least one embodiment, the transmitter 202 is a transceiver that bi-directionally communicates with the entertainment device 102. For example, the remote control 106A may receive IR database or firmware updates from the entertainment device 102A.
The remote control 106A further includes a battery connector 212 that connects to a battery 210 powering the remote control 106A. The battery connector 212 may comprise any type of connector that connects to the battery 210 to draw power for supplying other components of the remote control 106A. For example, the battery connector 212 may include two opposing connections for connecting to the terminals of an AA or AAA battery. In at least one embodiment, the battery connector 212 is configured to connect to multiple batteries, such as 2 or 4 AAA batteries.
The low battery detection module 208 is operable to detect low battery conditions of the remote control 106A. More particularly, the low battery detection module 208 is operable to determine whether a terminal voltage of the battery 210 drops below a threshold value, indicating a low battery condition. The low battery detection module 208 is capable of utilizing multiple threshold values for indicating a low battery condition, depending on the type of battery 210 utilized in the remote control 106A.
After the battery 210 is replaced in the remote control 106A, the low battery detection module 208 determines a type of the battery 210 connected to the battery connector 212. In at least one embodiment, the low battery detection module 208 measures the initial terminal voltage or impedance of the battery 210 to determine the type of the battery 210. For example, an initial voltage of  ̃1.50V for a single battery 210 may indicate an alkaline type battery 210. By contrast, an initial voltage of  ̃1.40 V for a single battery 210 may indicate a NiMH type battery 210. The low battery detection module 208 may include an analog-to-digital converter utilized to perform measurement functions for determining the type of the battery 210 powering the remote control 106A.
Responsive to determining the type of the battery 210, the low battery detection module 208 selects an appropriate low battery threshold value corresponding to the type of the battery 210. In at least one embodiment, the remote control 106A may store a table of threshold values, such as in the non-volatile memory 204, that correspond to various types of batteries useable by the remote control 106A. The threshold value may be selected to provide adequate warning to a user regarding a low battery condition.
FIG. 3 illustrates an embodiment of a graph 300 of the normalized relationship between terminal voltage and time for alkaline and NiMH batteries. In at least one embodiment, the threshold value may be selected to indicate to the user 108 when the battery 210 has set percentage of its usable life remaining. For example, 10% of remaining battery life corresponds with  ̃1.05 V for an alkaline battery and  ̃1.15 V for a NiMH battery. In at least one embodiment, responsive to detecting the low battery condition, the low battery detection module 208 transmits a message (via the transmitter 202) to the entertainment device 102 (see FIG. 1). The entertainment device 102 then outputs an indicator for presentation by the presentation device 104. In at least one embodiment, the low battery message may be transmitted to the entertainment device 102 appended to a control command. However, the low battery message may also be transmitted to the entertainment device 102 in a separate transmission.
If the terminal voltage of the battery 210 drops too low, then it may be unsafe for the remote control 106A to perform certain operations. For example, the remote control 106A may not be able to write data to the non-volatile memory 204 if the terminal voltage of the battery 210 is too low. Thus, in at least one embodiment, the low battery detection module 208 is adapted to compare the terminal voltage of the battery 210 with multiple threshold values. A first threshold value indicates when to warn the user 108 about the low battery threshold condition and a second threshold value indicates when the remote control 106A should refrain from performing certain functions, e.g., writing to memory. In at least one embodiment, the first threshold value is greater than the second threshold value. Thus, the user 108 is alerted about the low battery condition before the voltage of the battery 210 drops too low to perform certain functions of the remote control 106A.
FIG. 4 illustrates an embodiment of an entertainment device 102A of FIG. 1. More particularly, FIG. 4 illustrates an entertainment device 102A embodied as a television receiver (e.g., a set-top box). However, it is to be appreciated that the entertainment device 102A may comprise any type of device that presents any type of presentation content. FIG. 4 will be discussed in reference to the entertainment system 100 illustrated in FIG. 1. The entertainment device 102A includes an input interface 402, a wireless receiver 404 and an output interface 406. Each of these components will be discussed in greater detail below. The entertainment device 102A may include other components or devices not illustrated for the sake of brevity.
The input interface 402 is operable for receiving presentation content, e.g., video content. The input interface 402 may be operable for receiving and tuning any type of video content. For example, the input interface 402 may receive an over-the-air broadcast signal, a direct broadcast satellite signal or a cable television signal. In at least one embodiment, the input interface 402 may receive or retrieve content from a storage medium, such as an optical disk, internal or external hard drives, portable storage devices (e.g., universal serial bus (USB) memory sticks) and the like. The input interface 402 may also receive content from external servers, such as video servers, that are communicatively coupled to the entertainment device 102A over the internet or other types of data networks.
The wireless receiver 404 is operable to wirelessly receive and/or transmit data to the remote control 106 (see FIG. 2). The wireless receiver 404 may communicate with the remote control 106 utilizing any type of IR or RF communication link. In at least one embodiment, the wireless receiver 404 receives a key code from the remote control 106, and responsively provides the key code to the output interface 406. The wireless receiver 404 is further operable to receive other data from the remote control 106, such as low battery messages indicating a low battery condition in the remote control 106.
The output interface 406 is operable for controlling the operation of the entertainment device 102A. In at least one embodiment, the output interface 406 receives video content and responsively generates an output stream for presentation on a presentation device 104. The output interface 406 is further operable to receive a key code and manipulate the output of the video content responsive to the key code. In other words, the output interface 406 operates responsive to the key code to control an output stream of video content.
The output interface 406 is further operable to receive the low battery message and output an indicator to the user 108 regarding the low battery condition. For example, the output interface 406 may output a warning message in a video stream for presentation by the presentation device 104. FIG. 5 illustrates an embodiment of a screenshot 500 including a warning message regarding the low battery condition. The user 108 may take appropriate action responsive to the warning message to replace the batteries in the remote control to avoid disruptions to their viewing experience. Other indicators, such as audible indicators, blinking lights and the like may also be utilized by the entertainment device 102 to alert the user 108 regarding the low battery condition.
As described above, the entertainment device 102A (see FIG. 4) may solicit information from the user 108 (see FIG. 1) regarding the type of the battery powering the remote control 106. For example, the remote control 106 may identify that the batteries in the remote control 106 have been replaced. A battery replacement message may be transmitted to the entertainment device 102A.
Responsive to receiving the battery replacement message, the entertainment device 102A outputs a menu for presentation by the presentation device 104. FIG. 6 illustrates an embodiment of a screenshot 600 including a battery type selection menu. The presentation device 104 presents the screenshot 600 to the user 108. The user 108 then utilizes the remote control 106 to make a battery type selection from the menu in the screenshot 600. In at least one embodiment, the entertainment device 102A transmits a message to the remote control 106 indicating that the menu is presently being displayed by the presentation device 104. In other embodiments, the remote control 106 enters a user input solicitation state responsive to transmitting the battery replacement message to the entertainment device 102A to receive user input indicating the type of replacement battery in the remote control 106. The remote control 106 receives the user input from the user 108, and utilizes the user input to determine the type of battery powering the remote control 106. The remote control may then select an appropriate low battery threshold value based upon the type of battery powering the remote control 106.
FIG. 7 illustrates an embodiment of a process for indicating a low battery condition in a remote control for an entertainment device. The process of FIG. 7 will be discussed in reference to a television receiver. However, it is to be appreciated that the process may be applied to indicate low battery conditions in remote controls for other types of entertainment devices. The process of FIG. 7 is not all inclusive, and may include other operations not illustrated for the sake of brevity.
The process includes determining a type of battery powering a remote control for an entertainment device (operation 702). In at least one embodiment, the type of battery may be determined through detection circuitry of the remote control that detects the type of the battery by measuring an initial voltage of the battery. In other embodiments, user input may be utilized to determine the type of the battery. For example, the remote control may include a switch with selectable positions, each position corresponding with a particular type of battery powering the remote control. The remote control and the entertainment device may also solicit user input through one or more interfaces presented to the user by the entertainment devise and/or other associated presentation devices.
The process further includes selecting a low battery threshold for the battery based on the type of the battery (operation 704). The low battery threshold indicates a low battery condition of the remote control. In at least one embodiment, the remote control determines the low battery threshold by selecting a value from a stored table that corresponds with the battery type. In other embodiments, the remote control may query the entertainment device for the low battery threshold responsive to determining the type of the battery powering the remote control.
The process further includes measuring a voltage of the battery (operation 706). The voltage measurement may be performed by circuitry of the remote control, such as a processor and/or an analog-to-digital converter. In at least one embodiment, the remote control measures the voltage of the battery during processing of user input received via a keypad or other input device or during transmission/reception of data to the entertainment device.
The process further includes determining whether the voltage of the battery is below the low battery threshold (operation 708). If the voltage is below the low battery threshold, then processing continues at step 710. Otherwise, processing returns to 706 to complete another measurement operation during processing of subsequent user input or transmission of data. The determination operation may be performed by any type of processor and/or comparison circuitry of the remote control.
In operation 710, the remote control transmits a low battery message to the entertainment device responsive to determining that the voltage of the battery is below the low battery threshold. The entertainment device utilizes the low battery message to present an indicator to a user regarding the low battery condition of the remote control. For example, a television receiver may output a warning message prompting the user to replace the batteries in the remote control. In at least one embodiment, the remote control presents an indicator to a user on a display screen or other presentation device integrated with the remote control rather than transmitting a low battery message to the television receiver. Through the operation of the process of FIG. 7, a user is alerted to the existence of a low battery condition and is prompted to replace the batteries of the remote control.
The adjustment of the low battery threshold based on a type of battery utilized in a remote control may also be utilized to restrict the remote control from performing certain functions if the terminal voltage of the battery drops too low for safe operation. FIG. 8 illustrates an embodiment of a process for adjusting a voltage threshold indicating an unsafe operating condition of a remote control based on a battery type. The process of FIG. 8 will be discussed in regard to writing to a non-volatile memory of the remote control. However, it is to be appreciated that the process may be applied to restrict any operation performed by a remote control that may be unsafe if the voltage of the batteries is too low. The process of FIG. 8 is not all inclusive, and may include other operations not illustrated for the sake of brevity.
The process includes determining a type of battery powering a remote control (operation 802). Operation 802 may be performed similarly to operation 702 of FIG. 7. The process further includes determining a low battery threshold indicating when the remote control is to refrain from performing a specified function (e.g., writing to non-volatile memory) (operation 804). Operation 804 may be performed similarly to operation 704 of FIG. 7. In at least one embodiment, the threshold value indicating when the remote control is to refrain from writing to memory may be lower than the threshold value used to alert a user regarding a low battery condition of the remote control.
The process further includes receiving user input (operation 806). The user input may be received from a user via a keypad, touch screen or other similar input device of the remote control. In at least one embodiment, processing of the user input involves the remote control writing data to non-volatile memory. However, it may be unsafe for the remote control to write to non-volatile memory if the voltage of the battery is below the low battery threshold.
The process further includes measuring a voltage of the battery during processing of the user input (operation 808). Operation 808 may be performed similarly to operation 706 of FIG. 7. The voltage of the battery may also be measured during the performance of other actions of the remote control, such as receiving data from an entertainment device. For example, the remote control may receive data from the entertainment device that is transmitted without user action or knowledge. The process further includes determining whether the voltage of the battery is below the low battery threshold (operation 810). Operation 810 may be performed similarly to operation 708 of FIG. 7.
If the voltage of the battery is below the low battery threshold, then processing continues in step 812, and the remote control processes the user input without writing to the non-volatile memory. In at least one embodiment, the remote control sends a “critically low battery” message to the entertainment device for presentation to a user. If the voltage of the battery is not below the low battery threshold, then the remote control processes the user input and writes data to memory (operation 814), and loops back to operation 806. Thus, another measurement may be performed responsive to the next user input processed by the remote control. Through the operation of the process of FIG. 8, the remote control minimizes the possibility of data corruption caused by writing to memory when the terminal voltage of the batteries an insufficient to support the write function.
Although specific embodiments were described herein, the scope of the invention is not limited to those specific embodiments. The scope of the invention is defined by the following claims and any equivalents therein.

## Claims

1. A remote control comprising:
a battery connector that connects to a battery powering the remote control; and
a low battery detection module, coupled to the battery connector, operable to:
measure an initial voltage of the battery when the battery is connected to the battery connector;
determine a type of the battery connected to the battery connector from a plurality of possible battery types based upon a comparison of the initial voltage of the battery to initial voltages associated with each of the possible battery types:
determine a low battery threshold voltage associated with the determined type of the battery;
measure a measurement voltage of the battery; and
determine whether a low battery condition exists in the remote control if the measurement voltage of the battery is less than the low battery threshold voltage associated with the determined type of the battery.

2. The remote control of claim 1, further comprising: a transmitter coupled to the low battery detection module that transmits a low battery message to a controlled device responsive to the low battery detection module determining whether the low battery condition exists, wherein the controlled device utilizes the low battery message to present an indicator to a user regarding the low battery condition.

3. The remote control of claim 2, wherein the transmitter transmits the low battery message with a control command.

4. The remote control of claim 1, further comprising: a presentation device operable to output at least one indicator responsive to the low battery detection module determining that the low battery condition exists.

5. The remote control of claim 4, wherein the presentation device is operable to output an audible indicator regarding the low battery condition.

6. The remote control of claim 4, wherein the presentation device is operable to output a visual indicator regarding the low battery condition.

7. The remote control of claim 1, wherein the low battery detection module measures the measurement voltage of the battery during processing of user input received via an input device of the remote control.

8. The remote control of claim 1, wherein the low battery detection module measures the measurement voltage of the battery during exchange of information with a controlled device.

9. The remote control of claim 1, wherein the low battery detection module determines the low battery threshold voltage from a table that stores low battery threshold voltages for each of the plurality of possible battery types.

10. A system comprising:
an entertainment device including::
an output interface that outputs a presentation stream for presentation on a presentation device; and
a wireless receiver; and

a remote control including:
a battery connector that connects to a battery powering the remote control;
a low battery detection module coupled to the battery connector, operable to:
measure an initial voltage of the battery when the battery is connected to the battery connector;
determine a type of the battery connected to the battery connector from a plurality of possible battery types based upon a comparison of the initial voltage of the battery to initial voltages associated with each of the possible battery types;
determine a low battery threshold voltage associated with the determined type of the battery;
measure a measurement voltage of the battery; and
determine whether a low battery condition exists in the remote control if the measurement voltage of the battery is less than the low battery threshold voltage associated with the determined type of the battery.

11. The system of claim 10, further comprising: a transmitter coupled to the low battery detection module that transmits a low battery message to a controlled device responsive to the low battery detection module determining whether the low battery condition exists, wherein the entertainment device utilizes the low battery message to present an indicator to a user regarding the low battery condition.

12. The system of claim 10, wherein the low battery detection module determines the low battery threshold voltage from a table that stores low battery threshold voltages for each of the plurality of possible battery types.

13. A method of indicating a low battery condition for a remote control, the method comprising:
measuring an initial voltage of a battery when the battery is connected to a battery connector;
determining a type of the battery connected to the battery connector from a plurality of possible battery types based upon a comparison of the initial voltage of the battery to initial voltages associated with each of the possible battery types;
determining a low battery threshold voltage associated with the determined type of the battery;
measuring a measurement voltage of the battery; and
determining whether a low battery condition exists in the remote control if the measurement voltage of the battery is less than the low battery threshold voltage associated with the determined type of the battery.

14. The method of claim 13, further comprising:
transmitting a low battery message to a controlled device; and
utilizing the low battery message to present an indicator to a user regarding the low battery condition.

15. The method of claim 14, wherein the low battery message is transmitted with a control command.

16. The method of claim 14, further comprising outputting a visual indicator regarding the low battery condition on a presentation device.

17. The method of claim 13, wherein measuring a measurement voltage of the battery occurs during processing of user input received via an input device of the remote control.

18. The method of claim 13, wherein measuring the measurement voltage of the battery occurs during exchange of information with a controlled device.

19. The method of claim 13, wherein determining the low battery threshold further comprises selecting a value from a stored table that corresponds with the battery type.

20. The method of claim 13, wherein the determining of the low battery threshold voltage comprises obtaining the low battery threshold voltage from a table that stores low battery threshold voltages for each of the plurality of possible battery types.