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Author Topic: Battery voltage during charge  (Read 1531 times)

Offline tspoon

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Battery voltage during charge
« on: September 08, 2005, 03:09:45 AM »
 I loaded the latest build for my Jukebox 10 Player and also flashed the boot loader thingy yesterday. Now when charging it shows a continously updating battery voltage which is great. Can anyone tell me what voltage corresponds roughly to full charge.
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Offline wrecker

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Re: Battery voltage during charge
« Reply #1 on: September 09, 2005, 06:09:26 PM »
I believe full charge is supposed to be 4.8V. This is based on having 4 x 1.2V batteries.
There's some (not particularly easy to decipher) info here
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far out man...

Offline tspoon

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Re: Battery voltage during charge
« Reply #2 on: September 10, 2005, 03:41:52 PM »
 cheers wrecker - I decided to watch it and it topped out at around 5.55v, or about 1.39 volts per cell. From what I can gather the cells have a slightly higher voltage at full charge. I also found some good info here, mainly about the recorder, but has some battery voltage curves
http://www.rockbox.org/viewcvs.cgi/docs/CHARGING_ALGORITHM?rev=1.7
http://www.uwe-freese.de/hardware-projekte/rockbox/ladeverfahren.html

Interestingly the maximum voltage show here is 5.84 volts or so, which my unit never reached - maybe i should have left it longer
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