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Old April 1st 06, 01:00 AM posted to rec.radio.shortwave
clifto
 
Posts: n/a
Default NiMH batteries and charger in Satellit 700

Brian O wrote:
The Cadex site (www.cadex.com) says that there are important
differences between the chargers. They claim that:


The charge termination criterion is different. Most NiCd chargers
stop (or transition to trickle charge) on a characteristic voltage
drop. The NiMH voltage drop is more subtle. Most NiMH chargers
transition based on temperature.


The early units transitioned on a voltage plateau. Where NiCd will
start to drop in voltage after full charge, NiMH tends to stop
rising in voltage but not fall.

A NiCd charger will charge a NiMH until the voltage drops, which
(if it happens at all) will be long after the battery is badly
overcharged.

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