Guide
How to charge SmartBrake
To keep SmartBrake ready for use, charge the SmartBrake unit regularly and replace the controller battery when needed.
Estimated battery use with 6 hours of cycling per week.
- Brake unit: Charge approximately every 4–8 weeks (typically).
- Brake controller: several months (often 3–6 months)
Charging the SmartBrake unit
- Locate the charging port on the SmartBrake brake unit.
- Connect the supplied charger. Older versions use Micro USB, while versions supplied from May 2026 use USB-C.
Important: The brake unit is not waterproof while charging. Make sure the bicycle is in a safe, dry location during charging. The SmartBrake brake unit cannot be detached from the bicycle and must therefore be charged while mounted.
Charging the unit
Fully charged unit
When should you charge it?
Charge the SmartBrake unit:
- when the battery is low
- before long rides
- after a long period of storage
- when the system has not been used for a while
Low battery — unit
Fail-safe due to an empty unit battery
Controller batteries
The controllers use replaceable CR2032 batteries, available from ordinary shops that sell batteries. Replace the battery if:
- A low controller battery is indicated when you squeeze the lever while the SmartBrake brake unit is active.
- If no light appears on the controller when you squeeze the lever, the battery is empty. This applies whether or not the SmartBrake brake unit is active.
Low battery — BLS & TB
Fail-safe due to an empty controller battery
Replacing controller batteries
Carefully remove the CR2032 battery by pressing down the pin in the centre, marked with an arrow and a rounded end.
Turn anticlockwise to open the cover
Make sure the arrow on the cover points to “Close” when replacing the cover.
Storage tips
If SmartBrake will not be used for a while, charge it periodically rather than leaving it empty for several months.