Great capacity
"Huge capacity. I use this in CL27R lantern and it works great."
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The ARB-L21-6000 is a high-capacity 21700 Li-ion rechargeable battery engineered to deliver exceptional power and extended runtimes for your devices. With a massive 6000mAh capacity and a 10A maximum output, this battery ensures your gear stays powered up for longer, even under demanding conditions. Built-in protection circuitry prevents short circuits, overcharging, and overheating, while pressure relief vents ensure added safety. Even after 500 charge cycles, this robust battery maintains 75% of its original capacity, guaranteeing reliable power for years to come.
Please note that the ARB-L21-6000 battery does NOT have the capability of being used as a power bank. The power bank capability is ONLY available in the ARB-L21-6000B battery
This battery is NOT compatible with lights that use an 18650 battery, and older chargers including the Fenix ARE-A2, ARE-A4 and ARE-X1 2.0. It is compatible with the Fenix ARE-D1 and ARE-D2 chargers.
Additionally, this battery is NOT compatible with the Fenix E35R purchased prior to 2025.
For commercial orders and large purchases, contact us at (888) 775-9996 x6 or GET A QUOTE
WARNING. Be aware of counterfeit Fenix merchandise in the U.S. marketplace. READ MORE >>
Please note that the ARB-L21-6000 battery does NOT have the capability of being used as a power bank. The power bank capability is ONLY available in the ARB-L21-6000B.
Overall rating: 4.6857142 / 5 from 35 reviews.
Review topics: ["battery","capacity","upgrade","service"].
"Huge capacity. I use this in CL27R lantern and it works great."
— Leithen (5/5)
"The batteries arrived with a small amount of charge and took over 12 hours to fully charge but they seem to be doing alright."
— Gene M. (5/5)
"I use this battery in a PD40R flashlight. I would typically use this light inside very dark power generating plants while inspecting equipment, so long battery life is critical."
— Robert A. (5/5)
"Great product. Better than expected. Fast, friendly customer service."
— David F. (5/5)
"Love the capacity and the upgrade from the 5000mah battery."
— Rich B. (5/5)
"Outstanding"
— Rolando (5/5)
"I like it"
— Cristian O. (5/5)
"This battery powers my TK17 to perfection."
— Billy C. (5/5)
"These batteries work fantastic and hold their charge for my new Fenix LR35R PRO."
— Thomas F. (5/5)
"Replaced original battery with the 6000. Definitely happy I did. Last much longer than original battery."
— Glenn T. (5/5)
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