An e-bike is a regular bicycle with an added motor and battery system, so most maintenance basics carry over — with a few extra items specific to the electrical components.
Battery care
Lithium-ion batteries last longest when they're not left fully drained or stored at 100% for extended periods; many riders aim to keep the charge roughly between 20% and 80% for long-term storage. Avoid charging or storing the battery in extreme heat or cold, and if you won't ride for several weeks, check the charge level periodically rather than leaving it untouched.
Drivetrain cleaning
The extra torque from a motor puts more stress on the chain, cassette, and chainring than an unassisted bike, so keeping the drivetrain clean and lubricated matters even more. Wipe the chain down after wet or muddy rides and reapply lubricant regularly — a dry, gritty chain wears out the rest of the drivetrain faster.
Tire pressure and general checks
Check tire pressure regularly; under-inflated tires increase rolling resistance, which drains the battery faster on top of feeling sluggish. It's also worth periodically checking that motor mounting bolts, the battery latch, and any connectors are snug — vibration over time can work fasteners loose.
When to see a mechanic
Anything involving the motor, battery internals, or wiring is best left to a qualified e-bike mechanic rather than DIY repair. Routine items like brake pads, tire wear, and chain lubrication are fine to handle yourself once you're comfortable with basic bike maintenance.