Fenix ARB-L21-5000U USB-C 21700 Battery

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The Fenix ARB-L21-5000U is a top-of-the-line 21700 battery with a large 5000mAh capacity, featuring a USB-C rechargeable function and durable lithium-ion composition. It is expertly crafted for optimal use in powerful flashlights and is the ideal partner for Fenix's 21700 flashlights.

Features of the Fenix ARB-L21-5000U battery:

  • High capacity (5000mAh), great reliability and compact design
  • 8A maximum output current
  • USB-C fast charging port built into battery
  • 1A recommended charging current. 5A maximum (Charges up to 2A max via USB port)
  • A protection Camping Lights & Lanterns circuit built into the negative terminal for outstanding damage resistance
  • Triple overheat protection for safety and reliability
  • Built-in overcharge and over-discharge protection
  • Unique structural design for better impact resistance
  • Button top positive contact for greater versatility
  • Dia 21.5mm, Length 76mm

Please note that this item is larger than an 18650-sized battery and will not fit in products designed to take 18650 batteries
USB-C charge cable is not included.


Delivery Details

In-stock items are dispatched the same day if ordered before 2pm (Monday - Friday) or the next working day if ordered after 2pm or on a weekend.

Deliveries are normally next working day for orders over £60. If under £60, we sometimes use a 48 hour service. You will have the option to upgrade to a next day service at the checkout.

Special Order items are dispatched within the timescales displayed after selecting your size.

Most orders are dispatched using DPD Next Working Day.

We use Royal Mail 24 for the more remote parts of Scotland, the Channel Islands and Northern Ireland. Please allow a little extra time for delivery in these areas.

For orders under £60, we normally dispatch using Royal Mail 48 with delivery being made in 2 to 3 days. You will have the option to upgrade to a next day service in the checkout.

A tracking number will be emailed to you for all orders over £60 on the day of dispatch.

For orders under £60 dispatched using an untracked economy service, a reference number will be emailed, but you will not get full tracking, only confirmation once delivery has been attempted.

Other Questions

Sometimes you will see 'Special Order' when selecting your size. For these items, we will dispatch once we have received them from our supplier.

An estimated lead time will be displayed for Special Order items.

Yes, returns are accepted within 30 days of purchase so long as it is unused and still in it's original packaging*.

You can return for an exchange or refund.

Refunds are carried out immediately after receiving your item back. Return postage is at your own cost.

* for safety reasons, we do not accept the return of climbing equipment or underwear once it has been tried on.

All items sold come with a minimum 12 month warranty that covers defects in materials or workmanship.

Certain brands offer an additional warranty. You can find this information on the brands own website, or you can contact us for additional information.

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