It depends on which version of the lock you have.
- Our USB-rechargeable locks version can be fully charged in 4h, but it has to be direct power source or a strong power bank. We estimated that you will have to charge the batteries once or twice per year.
- The latest version, in collaboration with AXA, comes with no USB plug in. To recharge a battery you need first to remove the battery from the lock. We recommend to have a spare charged battery so that you can very quickly change the battery, and comfortably recharge the empty one. They use a CR123A type of battery.