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How many volts and amps would i need to charge 10x 1.2v 1800mAh Ni-MH batteries at the same time? Answered

So i have a battery pack of 10 rechargeable batteries (1.2v 1800mAh) and i was wondering how many amps and volts I need to charge them all at the same time. Instead of having to take out like 2 at a time to charge them. Is it possible to charge them all at the same time? Thanks for any answers!

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Yonatan24 (author)2017-04-28

Are they is parallel or series? Series I'd guess.

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Alberto64 (author)Yonatan242017-04-28

yeah I'm trying to get 12v out of 10 1.2v batteries

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Yonatan24 (author)Alberto642017-04-29

To get a 12V 1.8Ah battery? Not a bad idea!

Not sure if you know, but you can buy a 12V 1.8A(or more) lithium ion battery on eBay for $10. I bought one 3 years ago and it's still going great. It's also way smaller, has short circuit protection and more...

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Yonatan24 (author)Yonatan242017-04-29

Oh, and I used it here: https://www.instructables.com/id/Handheld-Dimmable... after it was used for my bike siren and a different flashlight.

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Alberto64 (author)Yonatan242017-05-02

Well thanks, I'll probably buy that since my setup dosen't have a circuit protection... Awesome flashlight project btw!

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Downunder35m (author)2017-04-27

You just need a charger that controls the temperature, charging state and current going into each cell ;)
Battery packs usually fail after some time because one or more cells give up sooner than the rest.
You can try chargers for RC packs, they usually comes for 7.2V.
Don't know of any commercial charger cabable to handle 10 cells at a time.

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Alberto64 (author)Downunder35m2017-04-27

Alright thanks! I'll try to find one that will work:)

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