Connect the Digital Knee to any USB charger to charge the battery.
Status:
Light is flashing green: The device has enough charge to be used.
Light is solid green: The device is fully charged when the light turns solid green.
Light is red : Your device will need charging soon.
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.
Please refer to What the different LED colors mean for more information.