Abstract: A battery monitor called a “Voltminder” connects to one or more batteries requiring monitoring via a cigarette lighter cord, or by direct connection to the battery circuit. The battery may be mounted in a motor vehicle, boat, recreation vehicle, or any place requiring the monitoring of the battery voltage. A UHF transceiver transmits the battery voltage, interior temperature, and transmitter ID on a periodic basis to a remote receiver. The transmitter transmits the identity of the particular battery so the distinct battery is know, to distinguish it from other monitored batteries.

Abstract: A voltage monitor that is operable in two distinct modes. The first mode is the basic model without a transmitter or receiver. The only functions are battery voltage and audible alarm. The second mode is the Voltminder with a alarm and data transmission capability. The standard Voltminder placed in the second mode by adding a transmitter board to the vehicle located Voltminder and a receiver to the home located Voltminder. A programmable monitor reads and tracks a battery voltage, and indicates when a battery voltage drops below a predetermined value. A display shows battery status, and an audible signal is produced when the battery falls below a predetermined voltage.