How does cold weather affect eBike battery performance?

Lithium batteries lose 20-40% of their capacity in temperatures below freezing (0°C / 32°F). At -10°C (14°F), some batteries struggle to start and can give false low-battery warnings. Store your bike indoors in winter to keep the battery warm before riding. Once the battery warms up through use, performance largely recovers. Avoid fast charging a cold battery.