Patent ID: 9379558
Filing Date: 2016-06-28
CPC Classification: H02J

Claim Text:
1. An apparatus comprising: an alternating current (AC) adapter input to couple to an external AC adapter; a main battery disposed within the computing device; a main battery charger disposed within the computing device and coupled to the AC adapter input, the main battery charger to charge the main battery; a first diode coupled between the main battery charger and the AC adapter input; a processor and storage device disposed within the computing device to receive power from the main battery and coupled to receive power from the AC adapter input while bypassing the main battery charger; a first external expansion battery connector coupled to the AC adapter input through the first diode, the first external expansion battery connector bypassing the main battery charger, the first external expansion battery connector to provide sufficient current from the AC adapter input to enable charging of an external expansion battery having an external battery charger at a rate higher than a maximum charge rate of the main battery charger, the external expansion battery external to the computing device; a second external expansion battery connector coupled to the processor and storage device: a second diode coupled between the second external expansion battery connector and the processor and storage device, the second diode to allow current to flow from the external expansion battery to the processor and storage device and the main battery charger; and a third diode coupled between the main battery and the processor and storage device, the third diode electrically in parallel with the main battery charger and to allow current to flow from the main battery to the processor and storage device; wherein the first diode is also coupled between the AC adapter input and the first external expansion battery connector, the first diode to allow current to flow to the main battery charger, the processor and storage device, and the first external expansion battery connector.