maemo.org - Talk - View Single Post - Cheap (chinese) external BL-5J (and other models) battery charger: reverse engineering

	foxOnTheRun	2013-08-21 , 09:54
	Posts: 26 \| Thanked: 61 times \| Joined on May 2011 @ Italy	#43

Originally Posted by eccerr0r

Good Nickel Cadmium cells do cool down slightly when charging actually, then warm up when they are full. Because of this, some chargers detect the temperature change to tell when the cells are full. Though NiMH also warm up when full, they don't cool down as notably as NiCd during charge.

I don't think you could get away with running NiCd batteries in the N900 or with a Li-ion charger, however.

Nope, the somewhat integrated charging algorithm would refuse or badly/wrongly charge the batteries. I remember the charge in the XM5800 shows a pulsed profile when checked at the battery terminals.

If it was just checking the cell voltage, you could hook up an equivalent battery (aka: 3 ni-cd or NiMH in series) - but it's wild speculation couse I don't want to risk my phone

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