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Old 12-20-2007, 10:24 PM   #1
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Default General battery charging question.

I am new so any help from experts will be greatly appreciated. QUestions:
1) I have following batteries:
a)NiCD 7.2volts sub-cell C, 1500mah battery
b)NiMH 8.4Volt sub-cell C, 4500mah battery
c) NiMh 7.2Volts sub-cell 2/3A 1100mah Battery?
d) LiPo 7.4 Volt 2S , 900 mah
e) LiPo 11.1 Volt 3S, 1800 mah.
What current should i charge them at ? What is the best charing current and whats the MAX current i can charge at?

2) If i charge at higher current and battery becomes warm. DOes that mean its charged?

3) for same volts and same mah capacity battery.. one is sub-cell C and another one is sub-cell 2/3A (for mini trucks) are charging current/volt same?

4) Some people say chargin at very low current for longer period is good. Is that right? Does chargin at higher current give u same/similar amount of juice in battery quicker? Only that it reduces lifetime of battery?

Help me guys.. I need it
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Old 12-21-2007, 10:51 AM   #2
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Default

Quote:
Originally Posted by neupane00 View Post
I am new so any help from experts will be greatly appreciated. QUestions:
1) I have following batteries:
a)NiCD 7.2volts sub-cell C, 1500mah battery
b)NiMH 8.4Volt sub-cell C, 4500mah battery
c) NiMh 7.2Volts sub-cell 2/3A 1100mah Battery?
d) LiPo 7.4 Volt 2S , 900 mah
e) LiPo 11.1 Volt 3S, 1800 mah.
What current should i charge them at ? What is the best charing current and whats the MAX current i can charge at?

2) If i charge at higher current and battery becomes warm. DOes that mean its charged?

3) for same volts and same mah capacity battery.. one is sub-cell C and another one is sub-cell 2/3A (for mini trucks) are charging current/volt same?

4) Some people say chargin at very low current for longer period is good. Is that right? Does chargin at higher current give u same/similar amount of juice in battery quicker? Only that it reduces lifetime of battery?

Help me guys.. I need it
I mostly chage nimh batterys for the 4500 go 6 amps with the mv set at 3mv peak per cell or 21mv per pack, for small batterys I go 1.5 amps with a 4mv peak per cell and for all nimh batterys put the temp cut off at 125 degrees f for lipo I think the carge is if you were charging the 900mah pack put the amps at .9. and the 1800 use 1.8 amps this works for any lipo battery just move the decimal to the left 3 times. AND MAKE SURE YOU HAVE A LIPO SPECIFIC CHARGER!!!!! Good luck
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