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  #1  
Old 12-14-2002, 06:42 PM
GiantScale GiantScale is offline
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NIMH vs NICAD & 4 cell battery holder charging?

Iv got a few nice adjustable chargers (graupner Duo plus II & C&E pitt-bull ) and I just bought a few AA 4 cell holders with which Id like to use to charge 4 AA NIMH or NICAD batteries with.

What charge rate should I use for 4 & cut-off voltage?

I also considered the ni-cads also since they have better punch and handle the abuse of mulitipal charge cycles a day.

Anyt comments welcome..

Mike
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Old 12-18-2002, 08:02 AM
GiantScale GiantScale is offline
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Anyone?

OK, lets make this more simple..

What kind (brand & mah) of AA's are the best for a Mini-z which would get recharged many times a day, and how many amps should I peak charge all 4 batteries together at?

Thanks

Mike
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Old 12-18-2002, 09:05 AM
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Namuna Namuna is offline
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Make sure the batt holder is setup in series and that you put the batteries in, in series.

NiMH & NiCads are 1.2v, then 4x1.2v = 4.8v

So, set your charger up for 4.8v

For Fast Charge:
Set the amperage = to the rating of the batteries (ie; if the batts are 1700mAH, set the amp charge rate the same)...1 hour later you've got charged batts

Notes:
- Since the batts are loose, they're not 'matched' to each other, so depending on the 'monitoring' capabilities of the charger, you're likely to get uneven charging
- MONITOR THE HEAT!!! coming off the batteries while you're charging them...If they get excessively hot, use a lower amperage rate to charge them.
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Old 12-18-2002, 12:19 PM
GiantScale GiantScale is offline
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Thanks Namuna!!

So I should charge 1700 mah batteries at 1.7 amps, to charge them in one hour?

What AA's are the best? Who makes them?

Thanks again!

Mike
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Old 12-18-2002, 01:32 PM
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Namuna Namuna is offline
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IMO, Maha (aka PowerEX) is the current champ for AAs. You can get them in 1800mAH capacity.

Yes, if you charge at the rate of the batteries capacity it'll take 1-hour to charge
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Old 12-19-2002, 01:09 PM
GiantScale GiantScale is offline
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Thanks again!

I just ordered the MaHa 1800's 12 bucks a 4 pack.

Mike
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