Applies to Circuit Rhythm and Circuit Tracks

The Circuit requires these specs to fully charge:

(OUTPUT 5.0V 2.0A 10.0W)

If you misplace the original USB charger, you will be able to fully charge the Circuit with an Apple iPad USB 12W charger. (See below)

Connecting the Circuit directly to a Mac or PC USB port will not be enough to charge the unit. 

The small Apple iPhone USB 5W charger block will Not charge the Circuits. (See below)