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?

  • 5
    Disappear and live out your days in a cabin in the woods before your friend finds out. (humour)
    – Andy P
    Jul 30, 2021 at 11:48
  • On the side of the 500 power pack it should have a battery indicator press the button and see if the lights light up ? If they indicate there is a charge, look for a manual online to see if there’s a specific way to start up.
    – Dan K
    Jul 31, 2021 at 8:23
  • @DanK Lights does not turn on after i press the the button on battery. But the battery is warm around the button even 2 days has passed after the charge.
    – germstrom
    Aug 1, 2021 at 9:45
  • Does the wall voltage/frequency in your location differ from your friend's electricity? Do you run on a generator?
    – Criggie
    Aug 2, 2021 at 1:14
  • 1
    @Criggie no it is the same. Thank you for reply. I have taken the bike to the nearest shop. They will check if the battery can be repaired.
    – germstrom
    Aug 3, 2021 at 15:26

2 Answers 2


You should tell your friend ASAP that the bike is not charging. Ask if there is a trick to making it work.

Your worst case is the battery has died, and you need to offer to contribute toward a new one. When borrowing something, you are responsible for it, and and for any damage.

Your friend might have known the battery was on its last-legs, if they didn't tell you, that's not very friendly. However that interaction would be more on-topic at https://interpersonal.stackexchange.com/


E-Bike was just 1 and a half year old The e-bike battery from bosch has 2 years warranty. The e-bike itself has just 1 year warranty. Battery was sent from a local store to bosch and I received a new one!

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.