When the battery voltage is too high, the charger will stop. It will protect batteries from the damage and the lifetime of batteries will be longer. Portable and light-charge at any time you want. The product is only 17.6g and very convenient to carry. You can charge in multiple ways, such as computer, power bank and vehicle power supply.
The charging time is about 1 hours, and the best operation time is about 8minutes. Different models may have different.