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It is possible for me to remove the battery of my ebike and I am wondering if it is safer to do that before charging it. Could there be a potential damage to the electric motor while charging a battery that is left on the bike?

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    Frame question - would you take a phone battery out of the phone before charging?
    – Criggie
    Sep 1, 2021 at 21:09
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    @Criggie: There are people who charge their RC car (or airplane) batteries in a bucket of sand. General Motors recommends you don’t charge their Chevy Bolt indoors. So there are cases of people taking the batteries elsewhere to charge ;)
    – Michael
    Sep 2, 2021 at 5:32

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If the electronics are designed and implemented correctly I see no way for charging to damage anything.

That being said, there have been rare cases where batteries went up in flames while charging. If it goes up in flames it’s obviously better for the bike if it happens away from it ;)

Charging makes the battery heat up. This reduces life time and (above a certain point) increases risk of fire. Depending on how the battery is mounted it might stay cooler when charged away from the bike.

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    I'd say with a flaming battery one of your least concerns is what happens to the bike.
    – juhist
    Sep 1, 2021 at 18:41
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The general recommendation is to charge away from the flammable things. If the whole bicycle can be brought away, should be good enough to charge on a bicycle, unless it is expensive enough you also want to protect it.

If you just own a flat, not a house, it may be very difficult to find a charging place "away from any flammable items". In this case the battery ideally should be charged in a protection box (not affiliated). Such boxes are available on the market. Of course, you need to remove the battery to put it into the box.

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