I have borrowed an e-bike from a friend few days ago. Yesterday battery was empty so I left it to charge last night. I left it overnight. Now when I put it in bike it does not work, not responding. I try to put in charger again but not responding, non of the lights are blinking anymore.
I used the bike's original charger. Charger itself does not have lights that indicates if is it charging or not.
There is a button for turning the battery on and off but seems like it is not working. But when I press it for a longer period the place around the stop button begins to heat.
Battery type is : powerpack 500 BOSCH (Li-ion 500Wh Made in Hungary)
Has anyone had a similar experience? What should I do?