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- ancient laptop battery recharging
April 21, 2008, 10:21 am
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I bought this ancient laptop (Toshiba T2000SX) on flea market.
It uses two batteries (second one is for BIOS):
-pa8725u (14.4V 2.2AH NiMH) shows 0,45VDC
-XZ0072P09 (6V NiCad) shows 0VDC
They are dead, but I'd like to just try to recharge them. Of course
there is no
original AC power supply. So, can I use standard
AC/DC converter (1000mA max)? Or maybe the 9V NiMh recharger?
Should I just connect + to + , set voltage to 12VDC and let it charge
for a while?
Re: ancient laptop battery recharging
Probably not. If it has 4 pins, it might expect the power supply to
provide multiple voltages (e.g. +5 V logic, +12 V for disk and CD, -12
V for the serial port).
Modern laptops generally take a single input voltage (e.g. 20 V) and
internally convert that to all of the other voltages needed. But old
ones were more likely to require several voltages.