METHOD FOR OPERATING AN APPLIANCE THAT USES THE METHOD

摘要

A method and apparatus is provided which uses a plurality of batteries (38) that are sequentially used to power an appliance (10). While one or more batteries (38) are used to power the appliance, one or more spare batteries (38) are charged for subsequent use. The rate of charge of the batteries (38) is comparable to the rate of discharge of the batteries (38) by the appliance (10) or faster. Thus the appliance (10) may be essentially continuously used by the user removing the discharged battery (38) and inserting a charged battery (38).