How do I lock my eBike to prevent theft?

Use two locks: a high-security U-lock (Kryptonite, ABUS) through the frame and rear wheel secured to a fixed object, plus a heavy-duty chain or secondary U-lock for the front wheel. Remove the battery and display if leaving for extended periods — these are expensive and easy to steal. Register your eBike and photograph the serial number. Covered, well-lit parking reduces theft risk significantly.