Olight 21700 5000 mAh Accu

This Olight 21700 5000 mAh rechargeable Li-ion battery is designed to keep your camp lights powered, whether you’re on a weekend backpacking trip or setting up base at a remote campsite. It serves as a reliable spare or replacement cell for a wide range of Olight flashlights and accessories.

Boasting a substantial 5000 mAh capacity, this battery delivers extended runtimes so you won’t be swapping cells as often. Its rechargeable Li-ion chemistry lets you recharge hundreds of times, cutting down on disposable batteries and extra weight. Compatibility spans popular Olight lines—including the Warrior, Seeker, Odin and Perun series—making it a handy addition to any kit that relies on dependable light output.

The “21700” label refers to the battery’s size: 21 mm in diameter and 70 mm in length. Compared with smaller cells, this format accommodates more active material, which is how it achieves its high capacity. In practical terms, that means longer burn times or sustained use of higher-power lighting modes before you need to recharge.