Please meet the electronics inside a Li-ion laptop battery pack! There are two boards. Larger one has the smart charger IC (bq2060), five status LEDs, MOSFETs for charge control and other discrete components.
Smart charger circuitry.
The smaller connector board has 5 lines, out of which I could identify 4 and use 2: positive and negative battery pack leads, that are bidirectional (charge and discharge current flows there). Electronics on this board looks like a level converter for serial communication between the computer and the pack.
This setup works perfectly even without the small board, thus connecting directly to red/black thick wires between the two PCBs. I don't need the connector, nor the data communication feature: I want to recharge the pack and use its energy.
Questions? Contact me via mycall at yahoo.com. You should know what "mycall" is...
If you happen to hold presentations, whether in front of a large audience or a Club group of people, spice up your speech using a Prezi-based slideshow.
If your files are spread across several computers, even on different operating systems (Win, Lin, Mac), you might appreciate the free service offered by Dropbox. And if you decide to sign up for the initial 2GB space, please consider using my referral link so that we both get a free upgrade (+250MB).