Thread: A novel idea to fix the USB port
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Fallingwater is offline Fallingwater
2012-09-01 , 01:05
Posts: 80 | Thanked: 79 times | Joined on May 2012 @ Northern Italy
#24
Originally Posted by Estel View Post
Not exactly. Li-Ion's are not accepting same current due whole charging process. Basically, nominal "C" value of charge (for example, 1C) is only happening during ~half of charging process. Then, battery is "reporting" ~4.2 V, and charger starts to gradually decrease current, keeping battery at no more than 4.2 V (less in case of N900, as it's charging and using power at the same time)
Not entirely correct.
First up, the CC/CV (constant current / constant voltage) charging process switches to CV somewhere at 80% capacity, not 50% --edit-- I got doubtful about this and I'm currently looking for relevant information --end edit--
Secondly, the N900 definitely does charge its LiIon cell to 4.2V; the negligible power it's using to keep itself running in the meantime is irrelevant.

As for Your discovery about fake charger - it explains mysterious 650 mA max. How lame, 50% of declared max current
Coulda been worse.
Last edited by Fallingwater; 2012-09-01 at 02:38.
 

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