Patent ID: 8831698

Claim:
A device holster comprising: a body portion that contains a cellular telephone; and a pouch portion connected to the body portion, wherein the pouch portion contains an accessory module, the pouch portion comprising a pouch interface that mates with a module interface of the accessory module to enable data communications and power transmissions between the accessory module and the cellular telephone via a device interface between the accessory module and the cellular telephone, wherein the accessory module comprises one accessory module selected from the group consisting of a heating element that uses a resistive heating technology, wherein the heating element draws power from a power source of the cellular telephone and warms a portion of the device holster, a light emitting diode, a light source that displays a logo, a programmable light source that displays text, a device charger module comprising a retractable power plug, a rechargeable battery that powers the cellular telephone, a display accessory module, a keypad module, a communication module, and an input/output module.