New rechargeable battery using advanced lithium ion technology to produce 3.7 volts for 1200 mah.
Great choice to power your flashlights and other electronics that are rated for the 3.7 volts.
The 14500 size is the same as an AA battery.
Important: Check you product documentation before trying this battery if it did not come with a rechargeable battery. It is absolutely essential, that the device that is intended to be powered by a 14500 cell, be able to accept a 3.7 volt battery. Most primary AA cells are 1.5 volts and your device may not be able to handle the increased voltage. We will not be held responsible if you ignore this advice. Many, if not most flashlights that run on ONE AA cell, can also accept a 14500 lithium battery. MOST flashlights that use TWO AA cells, CANNOT accept 14500 batteries. This is because the voltage of the light will typically not go above 4 volts. Ergo, ONE 3.7 volt battery is okay, but TWO of them, is TOO MUCH voltage! It would physically kill your flashlight to feed it that much power!
For a 2xAA flashlight to be able to run on two 14500ís, the light would need to be able to accept up to 8 volts.
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