1. Regular charging takes about 6 hours, and a full charge takes 6-8 hours (the charger indicator turns green when fully charged);
2. The power display may be inaccurate for the first charge, and it will return to normal after draining the power and recharging once;
3. The indicator turns red when charging and green when fully charged; 4. The battery has natural loss if left unused for a long time;
5. The chargers of single-head/double-head brushes, roller brushes and robots are mutually universal.