The battery you have is most likely built to the Smart Battery System (SBS)
Spec. Read all about it:
http://www.mediacity.com/~sbs/specs.htm

Do not attempt to charge a Li-Ion battery unless you know EXACTLY what you are
doing. Charging one of these the wrong way could cause the battery to explode
with enough force to cause fatal body injury. A properly designed Li-Ion pack
will have double or triple redundant safety circuitry to prevent
overcharge/overdischarge (in addition to any gas gauge circuitry, be it SBS
compatable or otherwise).

You will likely have difficulty finding data for the IC's in the pack. It is
very unlikely that Panasonic would use a Maxim or Benchmarq part in one of their
packs. More likely, the IC's are custom or semicustom designs.

Dave Sorlien

Zoltan Perhacs wrote:

> Hello !
>
> I have a Panasonic CGR-B/202 7.2V 1.25Ah Li-Ion battery, originally built
> for
> digital cameras. It has the 2 main connectors and has 3 more. In the package
> inside there is a little electronics.
> Can someone tell me what this electronics do ? Is there any schematics for
> it ?
>
> Can anyone tell me informations about the Sony InfoLithium protocol, and
> connectors ?
>
> Thanx !
>
>     Zoltan Perhacs