Read and follow the manufacturer’s instructions.
2. Never rely on an untested third-party product. Always use the official charger and wall adapter supplied by the bicycle manufacturer, plugging it directly into the wall. Brompton makes this easy by providing consumers with a charger that fits right into the built-in storage on the battery bag.
3. For extra peace of mind, unplug your battery when you are done charging. It’s a good practice to never leave a charging bike unattended, near potentially flammable objects or overnight when house occupants are sleeping.