Range failure: The most common case. You misjudged your route or forgot to charge the battery the day before, and assistance cuts out a few kilometers from your destination.
Battery theft: Unfortunately, batteries are expensive and attractive components. In case of theft, you’ll have to ride the bike home under your own power.
Bike transport: If you place your e-bike on a car bike rack, it is strongly recommended to remove the battery to reduce weight and protect it. Once you arrive, you may need to move the bike without reinstalling the battery right away.
Physical training: Some cyclists deliberately choose to ride without assistance to increase training intensity, while keeping the option to reinstall the battery for daily trips.
Storage: If you store your bike for a long period, it is recommended to remove the battery, but you might still need the bike for a quick errand.
An electrical system failure