Home Power Batteries Fenix 21700 5000 mAh Li-ion Protected Battery (ARB-L21-5000 V2)
1 6
Fenix  |  ARB-L21-5000

Fenix 21700 5000 mAh Li-ion Protected Battery (ARB-L21-5000 V2)

£26.95 £28.95
7% off
Important Notice: Batteries cannot be returned once they have been opened for reasons of safety and resale. Therefore please ensure you are buying the correct batteries for the intended purpose. If you need assistance prior to purchase then please do get in touch.

The Fenix ARB-L21-5000 V2 is a premium quality high capacity 21700, 5000 mAh lithium-ion battery specifically designed for high intensity torch use and is the perfect companion for a range of Fenix torches, including the PD40R V3.0, PD36R or TK22 V2.0.

Please note: This battery is larger than an 18650 battery and cannot be used in standard 18650 sized torches.

Product Features

7.5 A maximum discharge current
High capacity (5000 mAh), great reliability and compact design
Recommended 1 A charging current, 5 A maximum
Protection circuit built into positive 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

Battery Charger Information:
You will need to purchase a suitable battery charger if you do not have one, please see the related products. This battery not compatible with the X and C series of Fenix chargers, but can be used with the ARE-A2, ARE-A4, ARE-D1 and ARE-D2.

Pack Information
Batteries per Pack: 1
Weight: 72.5 grams per battery
Details for Fenix ARB-L21-5000 21700 Protected Li-ion Battery
Battery Technology: Lithium-ion (Rechargeable)
Diameter: 21.5 mm
Height: 76 mm
Voltage: 3.6 V
Capacity: 5000 mAh
Charging Current: Recommended 1 A, Maximum 5 A
Maximum Discharge Current: 7.5 A

Important Safety Information

Lithium-ion batteries should never be left charging unattended under any circumstances. The user must have knowledge of how to charge and discharge Li-ion batteries before using them - for more information please click here. Always use a charger that is designed to recharge the particular lithium-ion cell that you wish to recharge. Never use a DC adaptor to charge Li-ion batteries. We are NOT responsible for any damage that is caused by the misuse of lithium-ion batteries. We recommend charging any lithium-ion cell on a metal surface or other non-flammable surface.

Packaging and Contents

Supplied in retail pack and contains:
Fenix 21700 3.6 V, 5000 mAh V2 rechargeable lithium-ion protected battery x 1

Let customers speak for us

from 3743 reviews
Great Headlight

I love everything about it. Perfect for late night walks or runs, or spying on foxes and badgers. The warm light is massively underrated too. My partner when on dog walks really appreciates not getting flashed in the face by 5000k+ white light when I look at her.

Samuel C.
Fenix HL18R-T V2 Trail Running Rechargeable LED Head Torch
Quality

I like the build quality and it appears to be quite robust, but the the fact I can change the battery unlike my two olight balder pro r was the deciding factor.

Alan H.
Fenix GL23R Tactical Rail Light
Excellent batteries, not cheap, but think will pay for themselves

I used AI to look for rechargable batteries for my Quest 3 controller as the ones I had were not lasting at all. It turns out I was using the wrong voltage ones. These batteries in particular were recommended because of their inovative design and features. These are directly charged via USB-C, with the port built into the battery. The pack comes with a charger, which is a single USB-A with four USB-C off of that. These batteries also feature an onboard chip which directs the battery to always supply the full 1.5v and always shows 100% (on my Quest 3) until the battery reaches 10%, at which point it indicates it needs recharging. So far this has worked exactly as described. These will pay for themselves easily within 6 months versus non rechargables, and for the features and the quality of these batteries, I am more than happy to pay the up fron premium. With respect to buying from Torches direct, I did so because even with Amazon Prime, I would not have recieved the batteries for several weeks due to holiday period. The battery price on Torch direct was comparable with Amazon, the only difference was I paid for the delivery, which cam the next working day after I ordered. Very happy with both the product and the service

Mark M.
Xtar AA 1.5 V, 2450 mAh USB-C Rechargeable Lithium-ion Protected Battery (4 Pack)
EDC37 Led Torch

Small but powerful torch. Long battery life when used in normal torch mode and has that powerful burst of light for as and when you need it. It is well constructed and feels good in your hand. It can get a little warm when used in high output but thats no bad thing in the winter.

Roy W.
Nitecore EDC37 Rechargeable LED Torch
An excellent versatile product

An excellent versatile product and well worth the cost.
This was bought to replace an aging, rubber coated version, as the rubber had deteriorated and become sticky and unpleasant.
The metal Torch Directversion is a far superior product. With the options of single beam, strip light or red strip light it is most versatile.

David M.
Core Lighting CL400 LED Work Light
Nice tiorch

This is a lovely torch well designed and able to chose light types warm to cool very pleased with it handy to keep in pocket

Brian
Nitecore TUP2 MCT Rechargeable LED Key Ring Torch

I work in the railway industry, as onboard traincrew.
My company issued lamp, while it serves its purpose and I still carry it in my bag, is very bulky.

While you wouldn’t be using the TX12 to carry out emergency protection, it is ideal to have on your keyring or in its holster to use during dispatch procedure for example.

Great product, would recommend. And the white light is quite bright!

Tom
Coast TX12 Tri Colour LED Torch
Beast of a torch 🔦

I’ve always used fenix headlamps for years because I do a lot of fishing and need quality gear that won’t let me down I bought this torch for something to use quickly the quality is there same as fenix headlamps when it comes to lighting for outdoors fenix are at the top of the market I paired it with 2 fenix 18650 4000ah batteries because I wouldn’t use any other battery in a fenix light people may think that it’s a lot of money for a torch and batteries the fenix headlamp I use cost over £200 and are used by search and rescue fenix supply the military and emergency services with there gear thats all I can say torch direct where prompt with delivery it’s an absolute beast of a torch pretty much bomb proof worth every penny

Mr J.M.
Fenix TK35 UE V2.0 LED Torch
Light and versatile

Bought for a friend who wanted something light and versatile for walking/camping trips. Great range of settings; very useful hands-free setting (switch on and off by waving hand — discovered this setting by accident!), nice removable head strap and USB charging function. Excellent value and arrived very quickly.

Rhiannon P.
Nitecore NU11 Rechargeable LED Head Torch & Clip Light
Great little Torch.

Good website, prompt delivery. The torch is light enough for a key ring, with one triple A battery. Easy to replace, simple to operate. Made by good company Fenix whom make tough stuff. Good buy.

John T.
Fenix E01 V2.0 LED Key Ring Torch
Top quality

Have used it a couple of times and although worried when I opened the box that’s bulkier than I was expecting it sits well on your forehead, is not at all heavy and works well.

Alan K.
NEBO Transcend 1500 Rechargeable LED Head Torch
brilliant edc

delivery and service was fantastic and the little edc is also fantastic, more than bright enough for an everyday carry.

steven e.
Nitecore EDC31 Slim Rechargeable LED Torch

Great quality torch
Good strong beam
Easy to use

Georgina S.
Maglite ML25LT 2 C Cell LED Torch
It's a Torch - but it's 'Top Dog!'

1. Light and compact.
2. Good that you can use both 'battery' [aaa] and 'battery pack'
3. For what it is, it comes at a reasonable price.
4. Many features regarding 'light type', but you'll probably, in the end, choose one.
5. First time that I have used/bought Nitecore and even though I am in no way an expert in 'head torches' it is damn good

stephen m.
Nitecore UT27 MCT Rechargeable LED Head Torch
Great touch for aviation.

I bought this torch as a present for my daughter who is a pilot,
It’s a great touch for doing her pre flight checks and general pilot duties.
Nice and bright and compact enough to fit in her flight bag.

Jude
Coast TX12 Tri Colour LED Torch