On Tue, 31 Aug 2004 18:47:31 +0100, Alistair Riddell wrote:

varies with battery type but the main technique used is measuring
the current flowing through the battery with temperature sensing
often used as a backup.

NiCd and NiMH chargers are constant current, indeed the only battery
technology that I can think of that uses constant voltage charging is
Lead Acid...

Detection of the rate of change of the terminal voltage is normally
used. Once the rate starts to fall the battery/cell is reaching fully
charged, the temperature will also start to rise more rapidly as the
supplied energy is no longer stored but dumped (for want of a better
expression).

--
Cheers
Dave. pam is missing e-mail