Here is what I *think* I know about this Li-ion battery. Please chime in with additions and / or corrections:
Starting from the corner, pins 1 and 2 are common and will connect to 'battery +' when the battery is turned on.
Pin 3 is a pilot level that can be used to turn the battery on if you pull it low and keep it low. The battery will turn off when you allow this pin to float up, provided there is adequate load current between 'battery +' and common ground (say 100 mA).
Pin 4 is unknown but seems a likely candidate for the thermistor temperature monitor
Pin 5 and 6 are common ground.
Pin 7 is also unknown but see 'pin 4'.
The battery will also turn on if you bias pins
1 and 2 above 3.3 V.
Corrections? Additions?
Thanks!
--Winston