my charger (Runke) started playing up a few days ago: during a ride the Est Range indicator suddenly went to 0 (but the bars on rh display are still showing charge).
Then when I plug it in, the bike starts up, the lights turn on(!) but there is no indication of charging. Charger fan won't start either. Generally, the bike acts like it had the key in and turned on. I can even get it running without the key in, just by plugging in and pulling the brake levers to see "GO". And there is some charging because the voltage goes up and the number of bars are increasing while plugged in. Obviously I don't want to charge it this way, not knowing what's happening....