Undervoltage alarm

[flyguy777]

Hello everyone after months of riding my ebike stealth bomber 72850 fardriver keeps reading undervoltage alarm, bike turns on but as soon as I touch the throttle is cuts off but imeadiatly turns back on....whats going on here can anyone help

 

[calab]

Hows the battery?

 

[flyguy777]

Hows the battery?

Battery is good, im now thinking it may be bms on battery. Looking at all obtions before i open battery case