Fenix ARB-L21-4000P Rechargeable 21700 Battery

Fenix ARB-L21-4000P Rechargeable 21700 Battery

Marsoni

M251S

$27.95

Get it in 3 business days with 1 day shipping. Friday, May 29

Fenix ARB-L21-4000P Rechargeable 21700 BatteryThe ARB L21 4000P battery supports large current output making it ideal for powering lights and other items that are operated at higher power loads. The maximum current for the ARB L21 4000P is 18A, with a continuous output current of 10A. The higher current allows the 21700 battery longer runtimes at higher levels in flashlights. As with all Fenix rechargeable batteries, the 21700 4000 mAH has three sets of overheat protection, including pressure

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
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If I could give this review, zero stars, I definitely would. I am extremely unhappy with the whole experience I’ve had with the seller, which is woot. They have no experience in selling products. They attach fake serial numbers on items that they shipped to you and when you tell them, you have a problem they are of no assistance. I am extremely infuriated with the quality of this product. I spent a lump sum amount of money on this now piece of junk. Oh, and to add my house almost caught on fire because the product overheated. I do not recommend anybody buy from the seller. The functionality is terrible. I am going to spread the word to everybody about my experience.

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Reviewed in the United States on October 16, 2025

Verified Purchase

Cyn Fry

Dallas, US

★★★★★ 5

Great little machine

Style: 88 oz & 5 Presets

I bought two! My sons love them!

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Reviewed in the United States on April 17, 2026

Verified Purchase