The Fenix ARB-L21-6000 21700 rechargeable Li-ion battery has a capacity of 6000mAh, providing the necessary voltage and power for long-lasting use and increased lumen capabilities. With the same features as other high-quality Fenix batteries, such as internal protective circuits and up to 500 charging cycles, the ARB-L21-6000 can ensure extended runtime and consistent performance. It also offers three sets of overheat protection - pressure relief, microporous, and PTC cathodal block - to maintain the battery's safety and stability. Never be without light; order a spare 21700 battery today.

THIS BATTERY IS NOT AN 18650, AND IT IS NOT COMPATIBLE WITH 18650 FLASHLIGHTS OR OLDER-STYLE CHARGERS (such as the ARE-C1 and other "C Series" chargers). COMPATIBLE CHARGERS ARE THE ARE-A2, ARE-A4, ARE-D1, OR ARE-D2. This is not the version of the battery with direct USB charging.

Shipping Note: Lithium ion batteries are considered "dangerous goods" per US transportation regulations and can often only be transported via ground shipment. Orders containing loose batteries will typically take much longer than predicted to be delivered. Delivery times of 14+ days are not uncommon.