Fenix ARB-L21-5000 V2 rechargeable 21700 battery provides the voltage and power needed for extended runtime and higher lumen capacities. The ARB-L21 comes with all the bells and whistles of high-quality Fenix batteries, including protective circuits inside the anode and up to 500 charging cycles. Also included are the three sets of overheat protection: pressure relief, microporous, and PTC cathodal block. Don't run out of light; pick up a spare 21700 battery today!
Price is for ONE battery.
COMPATIBLE CHARGERS ARE THE ARE-A2, ARE-A4, ARE-D1, OR ARE-D2. This battery does not have a USB port for direct 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 common.
Overall rating: 4.8254366 / 5 from 401 reviews.
The Fenix ARB-L21-5000 V2 rechargeable battery is praised for its long-lasting power, high-quality construction, and excellent service. Customers appreciate its ability to hold a charge, versatile light settings, and outstanding performance. Shipping times may be longer due to lithium-ion regulations.
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"I have used this battery (currently have three of them!) for over 10 years, recharging about every two weeks, after nearly constant use on a daily basis. You cannot buy a better battery, period!"
"Fenix Li-ion batteries are truly exceptional and reliable. The ARB-L21-5000 V2 Rechargeable 21700 Rechargeable Batteries hold their charge for extended periods and also recharge quickly. Perfect for my working, EDC and biking needs."
"A great battery, plenty of reserve power. Holds up in my flashlight for an extended period of time, very useful when staying out for days at a time, no need to recharge as often."
"Great quality, for spare or replacement."
"Received ARB-L21-5000 V2 battery and failed within 1 month. Using the provided USB type C charging cable that came with my HM70R headlamp to a customer provided Apple charging block & anker charging block the battery failed to charge. Fenix then wants customer to further invest $ to buy another after market charging block. This is the second battery failure. There are better headlamps on the market with better customer service. I will not buy another Fenix product."
"Works great, long hours. Strong light output. Sometimes too much light. Great battery."
"Love these flashlights. Quick delivery and customer service."
"Havent had it long enough to give a reciew but the flashlight it came in was great so ill give it a thumbs up until i know better."
"The Fenix ARB-L21-5000 V2 Battery last long charge fast and handle the use of being run on the highest output for the hours needed at least for myself. In real world experience."
"Perfect fit"
