Patent ID: 9240691
Filing Date: 2016-01-19
CPC Classification: H02J

Claim Text:
1. A method, comprising: detecting, at a module that includes a microcontroller, a voltage of a battery connected to a battery charger, wherein the voltage is below a minimum threshold voltage at which the battery charger detects the battery; and sending, by the module, at least one pulse of current to the battery to increase the voltage of the battery above the minimum threshold voltage, wherein the battery charger, once the voltage is above the minimum threshold voltage, detects the battery and begins to charge the battery, wherein the at least one pulse of current is sent from a general purpose input/output (GPIO) port of the microcontroller, and wherein the GPIO port is coupled to a gate of a p-channel field effect transistor (FET) and a first end of a first resistor, a second end of the first resistor is connected to a source of the p-channel FET, and a drain of the p-channel FET is connected to a diode.