21700
Last Longer Than 18650s
Do you want a longer-lasting flashlight without the bulky weight of higher-powered batteries? If so, then 21700 flashlights may just be the right illumination tools for you! These premium LED lights are powered by 21700 Li-ion batteries, which are just slightly larger than the more commonly-known 18650 yet offer a higher energy density and capacity. This means your 21700 flashlights will last longer and will deliver brighter outputs, without having to require two hands for carrying or for operation.
More Energy Density
Oftentimes, with high-powered flashlights, you have to sacrifice portability, comfort, and convenience in order to maintain long run times and bright outputs. For example, the Acebeam EC65 is powered by one 21700 battery. When in its 20-lumen Ultra Low mode, this EDC flashlight lasts for up to four days! That's 96 hours of use at a pretty reasonable output level. The Nitecore P12 is a 1x18650 flashlight with an unbeatable runtime of 520 hours (over 21 days!); however, this is when the light is in its 1-lumen Firefly mode. If you are looking for a light that can still illuminate a room after a couple of days, then choose a 21700 flashlight.
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