14500 Batteries
Rechargeable 14500 Batteries are lithium-ion cells similar in size to AA batteries but delivering higher 3.7V power for high-performance flashlights. These batteries deliver consistent performance through hundreds of charge cycles, providing reliable power day in and day out.
Is a 14500 right for your light?
A 14500 matches the AA size but works on different terms. It is a rechargeable lithium-ion cell that drives more output than a standard AA, which makes it a fit for compact flashlights designed to take advantage of the extra power, and it recharges rather than getting replaced each time it runs down.
The thing to get right is voltage. A 14500 runs at 3.7 volts against the 1.5 volts of the AA it resembles, and putting one in a light not rated for it can damage the light, so confirm your flashlight lists 14500 support before using one.