QUOTE(sbbloom69 @ Feb 10 2005, 08:53 AM)
Not all of the charging circuit is in the Zaurus. Half of it is actually INSIDE the BL-0X battery. There is a current regulator and a temperature sensor in the battery on a tiny circuit card just under the 3 battery contacts (ever notice the +, the - and the unlabled contact??). The reason these little high-powered batteries can be ...
Very informative post! Thanks.
Based on your post I tried a simple test to see if I could determine if the charging circuitry was working without the battery installed.
I pulled the battery and plugged in the charger. Then I measured the voltage across the + and - charging posts on my C860 running cacko 1.22 (it's not likely that the ROM makes a difference, but other ROMs might give different results).
I measured between .35 and .65 volts (using a Fluke 87 IV). Useless.
I then tried it again, but this time I pulled the battery while the charger was plugged in (after turning the Z off).
Measuring the voltage this time I got 4.2 volts with .002 volts ripple. I repeated this test twice.
Just the charger itself (an EA-72) was putting out 5.15 volts with .008 volts ripple (open circuit obviously).Then I unplugged the charger before replacing the battery.
1) there is regulation being done in the Z. And,
2) You can possibly use this test to see if it's a battery problem or a Z problem.
Please be careful as this might be a silly thing to do to a working Z.
And it goes without saying, but I'm not responsible for anything (just ask my Mom) especially anything that happens to your
And be sure to unplug the charger before replacing the battery.