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This battery uses lithium-ion cells, and changes the voltage of 3.7V to the constant output voltage of 1.5 V through voltage conversion technology. It completely replaces the disposable alkaline batteries and nickel-metal hydride batteries. Meanwhile, the stable output voltage of 1.5V of universal lithium batteries solves the problem that some electric appliances are unable to work because NI-MH rechargeable batteries' voltage is too low (1.2V). It has greatly improved the battery life. Battery has two outlet ends, the output of one end is 1.5V, the normal use of electrodes; the other end is 3.7V, used to charge the battery.
These rechargeable batteries will give you up to 3 times the life of standard Alkaline and are perfect for all AA and AAA electronics that require 1.5V