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#1
September 18th 04, 08:08 AM
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RobsSanta wrote:
My brain has totally gone blank for this simple question, I know I should have paid more attention in school !!!. I just was given a 12volt 1200mAh battery and a 200mh 3W wall charger ... So the obvious question is, how long should it take to full charge this battery using the supplied wall charger ? Assuming the charger is actually 200 mA (milliamps) then if things were 100% efficient it would take 1200 mA-hr/200 mA = 6 hr to fully charge. But allow an extra 25% or so for inefficiencies and about 7 - 8 hours should do if it starts out fully discharged. 
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