quote:

ORIGINAL: hobby_man

quote:

ORIGINAL: Brad Mc

Hey, I have a question about my lipos for my Revolt 30.  I have 2 of the 2 of the GrimRacer 7.4V, 5000 mAh batteries.  Attached is a picture of my charger while charging and a picture of my meter immediately after charging.  How is it possible for each cell to be over 3.7V??  Why does my charger show 8.16V while charging??  I removed the battereies from the charger as soon as they were complete.  My meter showed both batteries charged up to 99%.

Please help me understand, thanks!!

each cell of any lipo battery shows a voltage of 4.2 when charged
each cell should be at 4.2 so the cells are balanced/charged, if you get one cell at 4.2/4.19 or so and the other cell only gets to 4.0/4.01 the cells are off
you should follow the 80% rule, do not discharge any more than 80% of the batteries capacity
5000mah x .8 = 4000 you should see about 4000 mah being charged back into the battery
at the 80% discharge your cells will be about 3.6 volts each
if you over discharge the battery, say you take 5200 mah out of the battery your cells could drop below 3.0 volts and then the charger will give you a low voltage error and it will not charge them capacity

quote:

ORIGINAL: srt10

quote:

ORIGINAL: hobby_man

quote:

ORIGINAL: Brad Mc

Hey, I have a question about my lipos for my Revolt 30.  I have 2 of the 2 of the GrimRacer 7.4V, 5000 mAh batteries.  Attached is a picture of my charger while charging and a picture of my meter immediately after charging.  How is it possible for each cell to be over 3.7V??  Why does my charger show 8.16V while charging??  I removed the battereies from the charger as soon as they were complete.  My meter showed both batteries charged up to 99%.

Please help me understand, thanks!!

each cell of any lipo battery shows a voltage of 4.2 when charged
each cell should be at 4.2 so the cells are balanced/charged, if you get one cell at 4.2/4.19 or so and the other cell only gets to 4.0/4.01 the cells are off
you should follow the 80% rule, do not discharge any more than 80% of the batteries capacity
5000mah x .8 = 4000 you should see about 4000 mah being charged back into the battery
at the 80% discharge your cells will be about 3.6 volts each
if you over discharge the battery, say you take 5200 mah out of the battery your cells could drop below 3.0 volts and then the charger will give you a low voltage error and it will not charge them capacity

At 3.6v your packs have less than 10%

quote:

ORIGINAL: hobby_man

good thing I typed about 3.6 volts

I was off .057