need the help to understand the circuit of the battery of the PDA(acer N300)

I have bought a PDA (acer n300), and I can find nothing details about its battery. It is written on the back of the battery pack that: Model NO: BA-1405106 Product Name: Acer n300 battery pack, rechargeable lithium-ion battery Rating: DC 3.7v 1200mAh

At the bottom of the battery, there are 6 pins (3 pins each side).

| | | | | | a b c d e f

After charging the battery, I measured the tensions between all of these pins. And I got the following results: condition 1: unused situation Condition 2: under use situation (while the PDA works)

2 ) + a b -3.2 c -3.2 0 d 0.6 4 4 e 0.6 4 4 0 f -3.2 0 0 -4 -4 - a b c d e f

In condition 1, the tensions between the Pin A and D, the Pin A and E vary in the two fixed values 1.2 and 3.7

And in condition 2, all of the tensions who are measured with Pin A have descended by -3.2 v. Is there anyone who can explain why this battery behaves like this? Or maybe someone has some technical sheet about this battery pack. Tell me about it please ! Thank you in advance.

I was initially confused looking at the two sets of test results but after studying it for a while, I have created what I think is an easier table for viewing them (See attached file).

alex Wrote: