Bamboo Electric Toothbrushes

Specifications:1. Model: C series2. Main power: 2.5W3. Battery: lithium-ion battery 18500/1200mAh 3.7v4. Charging seat input: 5v DC 500mA Descriptions:1. During its first usage like newly bought products and if you haven't used it for 3 months andover, you'll need to charge it regarding the rest of the power.2. The suitable temperature is between 5 degrees to 35 degrees If the temp is over or below, it willcause the charger can't charge normally or can't charge at all3. To keep sufficient battery, it's advised to charge 2 times separately to save up the charging time too4. It is normal the temp of the machine goes up at using and charging time