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Old 01-03-2004, 05:46 PM   #1
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Default NIMH Transmitter Batts

Err what it have really destroyed the cells (AA 2100mah nimh) if I charged them with 4.5 amps? They were very hot after the charge . I probably should charge them at .5 amps from now on, but hopefully theyre not destroyed after that crazy charge.

Just checked em and theyre all 1.47 volts. Seems like theyre ok but I will take caution in the future

Last edited by KevanB; 01-03-2004 at 06:03 PM.
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Old 01-03-2004, 06:28 PM   #2
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Well, I can't tell you if they will be ok. You will just need to try them out and see how they still work! I'll keep my fingers crossed for you that they still work fine!

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Old 01-03-2004, 06:46 PM   #3
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Default they should be fine

they should be fine just charge them at 1 amp from now on only charge at 4.5 amps if needed right before a racee and your batts are dead in your transmitter.
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Old 01-03-2004, 07:13 PM   #4
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with these cells the lower the current the better.
it'll have longer operating capacity then.
i use 1.0A with 0.3mV/C peak.
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Old 01-03-2004, 07:42 PM   #5
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the point of a slow charge is they last longer.
with a faster charge they will go flat quicker.
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Old 01-06-2004, 03:25 PM   #6
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Default fast charge

If i'm using 800mah AAA for Mini-z, how high could I charge those cells with out damage?

Would the performance be worth it?
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Old 01-06-2004, 10:18 PM   #7
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Default Re: fast charge

Quote:
Originally posted by jc510
If i'm using 800mah AAA for Mini-z, how high could I charge those cells with out damage?

Would the performance be worth it?
on older AAA's i'd charge up to a maximum of 1.5 amps... but normally, .8 to 1 amp is all that is needed...

no, the performance gain is not worth it.
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Old 01-06-2004, 10:20 PM   #8
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Default Re: NIMH Transmitter Batts

Quote:
Originally posted by KevanB
Err what it have really destroyed the cells (AA 2100mah nimh) if I charged them with 4.5 amps? They were very hot after the charge . I probably should charge them at .5 amps from now on, but hopefully theyre not destroyed after that crazy charge.

Just checked em and theyre all 1.47 volts. Seems like theyre ok but I will take caution in the future

they're still ok for use, but im sure that in a couple of months you'd need to replaced them already.
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Old 01-06-2004, 10:46 PM   #9
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I use NiMh AAs for my transmitter. Usually I charge them at 1.5amps, sure you can charge them slower but could spend most of the day waiting for them to finish. Usually at 1.5 it could take around 1 hour. The quicker you charge though the quicker they can discharge.

If you were worried about charging them before a race I would suggest a 2nd set. So you can keep a fully charged set in your box.

I don't know what radio you have but mine uses the standard 8 AA holder that Radio Shack sells so a battery change is as easy as that. If you don't use that holder it still might be good to get if you want to charge a 2nd set.

For bigger races with 10 cars in a race I tend to use throwaways. They put out higher voltage.

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Old 01-06-2004, 11:24 PM   #10
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higher voltage would do what? i dont think they would do much at all.
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Old 01-06-2004, 11:31 PM   #11
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I'll mark on pack of AAA 800mah and charge the [email protected] out of them and the others, I'll do at 1.5.
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