alex8828

Hi All

i have GenAce lipo battery 4000mah 2S 30C. I am programming my esc what is a good cut off voltage?

raptureboy

3.0v per cell. Fully charged a 2 cell lipo will be around 8.4 volts so set it for 3.4v per cell to be on the safe side. Running too low can damage them.

alex8828

Thanks!

Foxy

3.0 is kinda low, but shoud be ok. Those who care about the longevity of their batteries would set it to 3.1 or 3.2.

R32GolfTA06

just out of curiosity.. what damage actually occurs to the cell.. what actually happens? thanks

chuckk2

Generally, eventually, sooner than expected, less capacity. Occasionally, a cell may balloon during subsequent charging.
Above 3.0V, the possible problems are less and less as 3.8-3.9V is approached. Above this prolonged storage can also result in problems.
If you are asking what happens inside the cell, I have no Idea!

chuckk2

3.2V is the accepted preferred setting. Remember that this is dependent on some variable and possibly unknown factors.
How much current is being drawn.
Voltage drop in wires & connectors between the Lipo and ESC.
Temperature
Accuracy of the ESC voltage setting.

Compare a lipo flown at a current of 10 A until the ESC voltage limit kicks in, vs. one flown at 30A.
The lipo used at 10A will likely have less energy remaining than the one at 30A.

alex8828

Would anyone know why my esc fan burnt out the 1st time it got power? I was adjusting the trim on the servo it started to smoke then shut of will not go back on now.

Foxy

If it blew on a 2S battery then it is either a bad fan or a bad internal BEC.

alex8828

Would there be anyway to tell?

phmaximus

yep, check the BEC's voltage output it should be 6v....

Just wondering what brand and model ESC.

alex8828

I have this HobbyWing X3A 1:10 Sensored Brushless RC Combo w/ XERUN 5.5T 3650-6000KV Sensored Motor & 120A ESC + Program Card for Professional 1/10 On-Road/Off-Road RC Cars

phmaximus

As far as I know they run the fan Directly from battery power....... but might be worth double checking