Dead Battery

 

 

So stupid that I forgot to switch off the alert indicator flash and run dry my battery. Luckily I installed a voltage indicator as that I notice the battery is low.

Connect to a 4s 2200mAh model lipo battery and carefully clamp the current which reads around 25A.

Immediately push start the engine and disconnect the lipo battery immeiately. Now the battery is charging up and reads 12.8V

 

P.S. An old 3s 12.6V lipo battery cannot start the engine. Though it can charge up the bike battery from 8V to 10.6V at 3-4A, which is slow but safer. Since I am in a hurry, I start up the bike with a 4s lipo (pre charged to 16.2V as emergency starteing battery) .