how to charge batteries without a charger

daguuy · Post by **daguuy** » Sat Sep 23, 2006 7:11 pm

i know different types of batteries use different types of chargers. but i don't have every type of charger and i don't want to buy every type of charger so here's my question. do all batteries charge by connecting them to a higher voltage limited current power source and disconnecting them when their charged? so if i hooked up a nimh AA to a 300ma 2v power source and kept an eye on the voltage, would it charge? same with alkaline, nicad, and lithium (though i wouldn't want to charge lithium batteries without a charger)? or is it more complecated than that?

vskid · Post by **vskid** » Sat Sep 23, 2006 7:22 pm

I think thats all it is, just reversing the chemical reaction that the battery does to power stuff. Why would you charge alkalines? Isn't that dangerous/hard to do? For my 7.2v nimh I just hook it up to a low amp 12v wall wart and figure up how long it should be plugged in and set a timer for that long that will turn the wall wart off (for 24hrs, I gotta take it off before then).

Post by **CronoTriggerfan** » Sat Sep 23, 2006 8:20 pm

Or just buy a universal charger. They're pretty cheap, and they eliminate tedious (and sometimes dangerous) guesswork.

CTFan

Kyosho · Post by **Kyosho** » Sat Sep 23, 2006 11:05 pm

vskid wrote:Why would you charge alkalines? Isn't that dangerous/hard to do?

http://www.afrotechmods.com/reallycheap ... /batts.htm

Then again...