Connect the Digital Knee to any USB charger to charge the battery.
The device has enough charge to be used when the light starts flashing green.
The device is fully charged when the light turns solid green.
We recommend you get in the habit of plugging your device in to charge each night, just like you you do with your phone. This ensures you are never stuck with a dead battery during the day.
If the light turns red your device will need charging soon.
Please refer to What the different LED colors mean for more information.