This new type of rechargeable battery is charged by manual rotating spring charge. The conventional battery charger can supply power as well. Its most prominent feature is when there is no charger, the users can twist the wind-up to charge, convenient and fast. It¡¯s not only suitable for home but also for field. Particularly in long-distance travel and exploration.
Because of rechargeable, wind-up battery is very environmental friendly.
Call for investors !!!