| 摘要 |
A method and apparatus is provided which uses a plurality of batteries that are sequentially used to power an appliance. While one or more batterie s are used to power the appliance, one or more batteries are charged for subsequent use. The rate of charge of the batteries is comparable to the rat e of discharge of the batteries by the appliance or faster. Thus the appliance may be essentially continuously used by the user removing the discharged battery and inserting a charged battery. |
