Emergency Charger

This charger is intended for use with one standard 1.5 V AA primary or secondary cell. It can, however, be used with any standard 1.2  1.5 V AA batteries. Higher quality or premium batteries are recommended, as their lower internal resistance increases performance of the charger. In order to optimize charging, the circuit decreases the charging current when the AA cell voltage falls below 1.1 V, and stops charging altogether when it falls below 0.6 V.

The Charger was intended for use with cellular telephones and other similar devices that are powered by a one-cell lithium-ion battery of any capacity.

Since each device model has different charging characteristics, it is possible that the charger will function differently with some models. Such situations can be rectified by slight changes to the circuit.