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Author Topic: Help with charging times.  (Read 1374 times)

overthesea

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Help with charging times.
« on: February 25, 2016, 04:19:45 PM »

Hi fellows, I have recently purchased ten C size 800mA batteries of 1.2v each. I intend to make them into two 6volt power packs. The charging time stated on the packet is that they should be charged for seven hours at 0.8amps. I have a Power Tech charger which will charge 4-7 cells at a time at 1.5amps. Can I use this charger to charge these made up battery packs (one at a time) without damaging the cells, and for how long to charge them?  Please no technical answers.
Thankee.
Alan H
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inertia

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Re: Help with charging times.
« Reply #1 on: February 25, 2016, 05:01:15 PM »

Alan
Please confirm that cell capacity value. 800maH sounds very, very low for a C-size cell, and seven hours' charge at 0.8A would stuff 5.6AH into the poor things - or seven times as much as they should theoretically hold (like trying to get seven gallons into a 1 gallon bucket without spilling any).
Are you sure they're not 8000mAH cells?
DM
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sparkey

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Re: Help with charging times.
« Reply #2 on: February 25, 2016, 05:22:25 PM »

 :-)) The lowest capacity c cells are 5000mah and they do 8000mah, so I think that is what you have got and in that case your charger would be ok........Ray. :-))
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overthesea

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Re: Help with charging times.
« Reply #3 on: February 25, 2016, 08:42:30 PM »

Soory folks,one of those moments.  The batteries are 'C' 4000mAh, make is Tronic eco Baby Nimh. Charge for 7hrs at 800mA.
Sorry again. can I still use the same charger?
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inertia

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Re: Help with charging times.
« Reply #4 on: February 25, 2016, 08:43:50 PM »

Yes. Charge each pack for about 3.5 hours.
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essex2visuvesi

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Re: Help with charging times.
« Reply #5 on: February 25, 2016, 08:49:45 PM »

keep an eye on them while charging to ensure they don't get too hot
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