I looked at a Li+ VX-1 that had a sudden dead while driving. Nothing worked, no charging, nothing, dead. The scooter was parked then for over 2 months. All Li+ batterie cells where empty 0,0 volt. What a sin.
Further investigation learned that the motorcontroller was broken. The 4 capacitor fuses (30A) where blown and the other 3 fuses had melted cap's! Holy crap, what could happened? Also the DC/DC converter turns out to be broken. I wondered how this could happen. I have a hypotheses and i want to share it with a warning. When a batterie or cell fails when driving, a regen action will generate a unlimited high voltage/power to the motorcontroller. That's a reason i can think off what blowe dthe MC. Any other idea's?
It's a precaution better not use the regen to brake when the batterie should fail while driving.