Discharge model Hit the big Diamond: remaining show of the drums One light: Remaining battery on 25% Two light: Remaining battery on 50% Three light: Remaining battery on 75% Four light: Remaining battery on 100% The light goes off itself after several seconds   Load model He glitter when charging, and he show how much power he has charged The first light glitter: Remaining battery <25% The second light glitter: Remaining battery <50% The third light glitter: Remaining battery <75% The fourth light glitter: Remaining battery <100% Four light up: fully charged