Abstract: Methods for extending the life of a battery output regulated voltages from output terminals configured to interface with input terminals of battery powered devices. A method includes receiving a battery electrical power output from the battery. The voltage output by the battery decreases from a battery first output voltage to a battery second output voltage during use of the battery. The electrical power output is used to drive a converter that outputs a converter electrical power having a converter output voltage greater than the battery second output voltage. The converter electrical power is output from output terminals configured to interface with input terminals of a battery powered device. The converter is configured and supported relative to the battery to interface with one or more output terminals of the battery.

Abstract: Battery life extending devices include a voltage boosting circuit that generates a boosted voltage from an insufficiently high battery output voltage. A voltage boosting circuit can employ voltage bypass to output the battery voltage when the battery outputs a sufficiently high voltage for the operation of a battery powered device. A voltage boosting circuit can reduce output voltage in response to reduced input voltage from the battery.

Abstract: Methods for extending the life of a battery output regulated voltages from output terminals configured to interface with input terminals of battery powered devices. A method includes receiving a battery electrical power output from the battery. The voltage output by the battery decreases from a battery first output voltage to a battery second output voltage during use of the battery. The electrical power output is used to drive a converter that outputs a converter electrical power having a converter output voltage greater than the battery second output voltage. The converter electrical power is output from output terminals configured to interface with input terminals of a battery powered device. The converter is configured and supported relative to the battery to interface with one or more output terminals of the battery.

Abstract: A battery sleeve for extending the operational life of one or more batteries, the battery sleeve comprising a positive conductive electrode configured such that when the battery sleeve is coupled to at least one battery, the positive conductive electrode of the sleeve serves as the new positive terminal of the at least one battery.