Consumer Electronics

Is it possible to use a triple A battery for a double A battery product or vice versa?


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Until a pro comes along to provide a technical answer, I'll provide some thoughts. AA versus AAA in battery description is only a matter of PHYSICAL size, and CAPACITY, IF they are of the SAME TYPE [i.e., alkaline, Nickel-Cadmium, Nickel-Metal Hydride, etc.]. They both provide the same voltage, and the only real difference is how long they can run the same device. Because of the difference in physical size, they will not fit in battery holders designed for the other. However, in an emergency sitation, if you can connect the positive and negative terminal ends of the batteries to the proper positive and negative terminals of the device, then they can be substituted for each other. Regarding the differences of the TYPES of batteries, the only practical difference is the output voltage, which varies slightly. For example, a fresh alkaline AA or AAA battery has an output voltage of 1.5 volts DC. If I recall correctly, a Nickel-Cadmium battery output is about 1.2 to 1.25 volts DC, and the Nickel-Metal Hydride output is about 1.2 volts DC. Hope this helps. j3h