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08-23-2009, 10:44 AM
| #1 |
| Newbie Join Date: Jul 2009 Location: oregon
Posts: 18
|  charging a new battery
Hello i have a new 6cell 7.2v 1500mAh NiMH the small A size. my charger is a onyx 230 my question is i have looked in the search and i have found lots of good info. i just want to make sure i am doing the charging right. i have charged the pac at 1.5A it charged to 1520 mAh or so and was not shuting off the pack was getting hot i still could hold my hand there but was hot. i unpluged the pack and let cool. was i doing somthing wrong thanks for any help and i will go and look around search some more thanks
Last edited by putzee; 08-23-2009 at 10:47 AM. Reason: forgot to put that info in |
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08-23-2009, 10:52 AM
| #2 |
| MODERATOR™   Join Date: Jul 2004 Location: Ohio
Posts: 18,928
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The internal resistance of the typical AA or A battery is high. Hence the heat at the 1C charge you were trying. Lower your charge rate to only about 0.3 - 0.7 amps and you should be better off. |
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08-23-2009, 10:59 AM
| #3 |
| Newbie Join Date: Jul 2009 Location: oregon
Posts: 18
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Thank you will give it a go next charging  |
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08-24-2009, 10:40 AM
| #4 |
| Quarry Creeper Join Date: Nov 2005 Location: Planet Earth
Posts: 350
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In addition to lowering the rate you may want to lower the mv for cut-off if possible. SubC NIMH use around 5 , but if they are AA or 2/3A then use around 3 if possible.
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