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I have a Black & Decker EPC128 12V cordless drill. It has two batteries. Since the recharger has no light or indicator on it, I never surely understand whether the battery is partly/fully charged or overcharged. How long exactly should I recharge the batteries? The tool is something like this:

bd_drill

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Does it not say in the instruction leaflet? –  ChrisF Mar 2 '12 at 22:22
    
I have lost the instruction leaflet. –  Mehper C. Palavuzlar Mar 2 '12 at 22:23
    
A search for the model number might turn up the instructions online. –  ChrisF Mar 2 '12 at 22:24
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Wow, that's a major design flaw - no blinky light! –  Doresoom Mar 2 '12 at 22:47
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Pretty sad as overcharging kills NiCad and NiMH batteries. There are many specialized chips that understand the charge cycle of both these battery chemistries and can sense when the maximum charge is reached and the cycle is complete for termination. Even cheap Chinese knockoff stuff includes smart charging. It's one of the reasons I've moved away from Black & Decker tools, they've gone too damn cheap. Overcharging also lights LiPoly batteries on fire, so if you don't have a smart balance charge system with that battery chemistry, you'll eventually pay for the cheapness. –  Fiasco Labs Jan 19 '13 at 19:32

1 Answer 1

up vote 5 down vote accepted

I have found the original instructions on this page.

After approx. 3 hours of charging, the battery will be sufficiently charged for use in regular applications. After approx. 8-10 hours of charging, the battery will be fully charged.

After a few lines, it says:

After normal use, a charging time of 3 hours will provide sufficient power for most applications. However, further charging for up to 6 hours could significantly increase the use time, depending on the battery and charging conditions.

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