I purchased a pkcell lp803860 (3.7v 2000mAh) battery for the imp006. I plugged the battery into the li-ion rechargeable battery port and then plugged in the USB power, expecting this to charge the li-on battery. However, after waiting awhile and then disconnecting the USB power the system immediately powers down.
The board works fine when plugged into USB power. Is there change in the pin-outs required to make this work or am I making incorrect assumptions about how the USB will charge a battery?