Fully Charged Battery Voltages...

BruiseLeee · June 2nd, 2005, 14:22

What voltage should a 9.6V 3000 mAH NiMH (large) battery be at when freshly charged?

I got an item from onlinebatterypacks.com and it was mislabeled as a 10.8V. It has eight cells and uncharged it was at 9.7 volts. After charging it was at 11.33v.

I e-mailed the guy at the site and he says it's ok, but I want to make sure.

me = paranoid.

:???:

PoFF · June 2nd, 2005, 14:25

That's normal, your battery is made to provide 9.6 Volts of power when under load (i.e. with a strong current beign pulled, such as 5 amperes, like an AEG motor). So it's normal to have higher voltage when the battery is 'resting'.

Eight cells of either NiCad or NI-MH will give 9.6 volts (8 X 1.2 volts), i would take 9 cells to have 10.8 volts.

Mantelope · June 2nd, 2005, 14:25

Eight cells will be 9.6. the 9.7 and 11.33 you're seeing are the voltages the charger is supplying to it to charge it.

BruiseLeee · June 2nd, 2005, 14:40

Thanks for good help.

me = not as paranoid as before. :xmas:

v82slo · June 2nd, 2005, 14:50

Quote:

Originally Posted by harleyb

Eight cells will be 9.6. the 9.7 and 11.33 you're seeing are the voltages the charger is supplying to it to charge it.

Actually I believe PoFF is correct. All my charged batteries (5-6 of em) indicate 1-2 volts higher than what they are rated at when at rest. The rated voltage is under load.

benjamingan · June 10th, 2005, 03:45

The 8 pcs battery pack is 8.6V actually. When you newly buy it and use it for the first time, you must charge it with normal charge, that is 0.1C charge. Like your 3000mah, you should chage it with 300ma for about 12 hours for the first time, then the life of your battery will be much longer. And though the nominal votage is 9.6V, but the actual votage a single cell after fresh charge will be about 1.4V. Then 1.4V*8=11.2 Then it will self discharge to 1.2V per cell.

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June 2nd, 2005, 14:22	#1
BruiseLeee Trader rating Join Date: May 2005 Location: Too Paranoid To Say	Fully Charged Battery Voltages... What voltage should a 9.6V 3000 mAH NiMH (large) battery be at when freshly charged? I got an item from onlinebatterypacks.com and it was mislabeled as a 10.8V. It has eight cells and uncharged it was at 9.7 volts. After charging it was at 11.33v. I e-mailed the guy at the site and he says it's ok, but I want to make sure. me = paranoid. :???:

June 2nd, 2005, 14:25	#2
PoFF Trader rating Join Date: Dec 2001 Location: Laval, QC	That's normal, your battery is made to provide 9.6 Volts of power when under load (i.e. with a strong current beign pulled, such as 5 amperes, like an AEG motor). So it's normal to have higher voltage when the battery is 'resting'. Eight cells of either NiCad or NI-MH will give 9.6 volts (8 X 1.2 volts), i would take 9 cells to have 10.8 volts. __________________ Founding member of the S.A.T.T - That's right, were BACK! The only purpose for a pistol is to fight your way back to the rifle you should have never laid down Visitez Arme ?* Feu.com - Le site des amateurs d'armes ?* feu francophones

June 2nd, 2005, 14:25	#3
Mantelope Scotty aka harleyb Trader rating Join Date: Mar 2004 Location: Toronto, Ontario	Eight cells will be 9.6. the 9.7 and 11.33 you're seeing are the voltages the charger is supplying to it to charge it. __________________

June 2nd, 2005, 14:40	#4
BruiseLeee Trader rating Join Date: May 2005 Location: Too Paranoid To Say	Thanks for good help. me = not as paranoid as before. :xmas:

June 10th, 2005, 03:45	#6
benjamingan Trader rating Join Date: Jun 2005 Location: Canton, China	The 8 pcs battery pack is 8.6V actually. When you newly buy it and use it for the first time, you must charge it with normal charge, that is 0.1C charge. Like your 3000mah, you should chage it with 300ma for about 12 hours for the first time, then the life of your battery will be much longer. And though the nominal votage is 9.6V, but the actual votage a single cell after fresh charge will be about 1.4V. Then 1.4V*8=11.2 Then it will self discharge to 1.2V per cell.

Fully Charged Battery Voltages...

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