Battery backed service indicator aids for field maintenance

Battery capacity and usage system

Battery capacity indication circuit and indication method...

Battery capacity indicator

Battery capacity indicator in a portable computing device

Battery capacity indicator in a portable computing device

Battery capacity meter

Battery case and secondary battery using the same

Battery charge control system for a hybrid vehicle driven by an

Battery charge indicating circuit

Battery charge indicating circuit

Battery charge monitoring apparatus and method

Battery charging status indication circuit

Battery charging, monitoring and alarm circuit

Battery condition monitoring system for batteries connected in p

Battery control system for electric automobiles

Battery detecting device for a radio pager

Battery discharge level detection circuit

Battery disconnection and abnormal output warning device for tri

Battery discriminator circuit for smoke detectors