Argument thread: Low specc batteries don't kill ESC's. Or do they?

[lincpimp]

Not addressed here but really basic is heat.

Load on the motor will dictate its draw from the batteries. If you gear a motor to pull 100wats, that is what it does. So if you have 100 volts you only need 10amps. And likely the wires in the system will be rated for that 10amp draw. So will other components of the esc, connectors, etc. So lets say your battery cannot provide the required voltage and it starts dropping, well the load is still there so the amps spike, in turn dropping the voltage more, causing more amp spikes, a viscious circle if you will.

Some of us here used to run nimhs, voltage drop and amps spikes were pretty common, as nimhs had a hard time keeping up with brushless, and that is why you would see alot of 30cell series nimh setups, as higher voltage lowers amp draw on a fixed load.

So crappy batts will drop voltage under load, and if the load is enough it will cause higher amp draws, which casues everything to heat up and can lead to equipment failure. Usually the esc goes first, but I have seen solder joints melt, motor windings short, and batteries go poof before the esc lets go. In fact i had a really stout MM back in the old days that together with a 7xl killed many a maxamps pack, and did some damage to a few nimh packs with a 7s motor.

Subpar batts are a problem, kinda like using bad gas in your car, that can cause issues too.