FREE UK Delivery on orders over £50

Fenix

18650 Fenix Battery - 4000 mAh

  • In Stock

  • £26.99


Fenix ARB-L18-4000 is a Premium Quality High Capacity 18650, 4000mAh Lithium - ion battery from Fenix, specifically designed for high intensity flashlight use and is the perfect companion for Fenix 18650 powered lights.

Battery Specs:

  • High capacity (4000mAh), great reliability and compact design
  • 7A maximum output current
  • Protection circuit built into 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
  • Diameter: 18.75 mm
  • Length: 69.2 mm
  • Weight: 55 g

Note! This is a 18650 battery. Other lamps may use a 21700 size battery - check your current battery carefully.

Questions & Answers

Question: Will this fit my [insert headlamp model]?

Answer: It's highly likely these will fit. They certainly fit any Fenix or Armytek lamp designed for this battery size.

Delivery Information

Products are shipped by UK courier from our Lancashire warehouse. Orders are dropped in the post each day 3pm Monday-Friday.

UK Standard Delivery

Delivery usually takes 2-3 working days. We mostly use Royal Mail Tracked 48 hour, bulkier orders may be sent by Yodel.

Orders under £50: £3.69
Orders over £50: FREE

UK Next Day Delivery

When available, orders placed by 3pm Mon-Fri will be shipped the same day by Royal Mail Tracked 24 hour. 

Cost: £4.99

Returns Information

Oversuit the wrong size? Bag bigger than you expected?

Not a problem, we're well aware of the unknowns of ordering gear online without seeing it in person first, or being able to try it on - we like to think we make the process as easy as possible.


If you've not used it yet and it's still in as-new condition, you can simply return it for either a refund or to swap for a different size.


Simply get in touch with us and let us know what the issue is, and we'll send you further details on sorting out your swap/refund.


Contact us to arrange swap/refund

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Tags: Lighting, Headlamp, Battery, 18650