• Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
  • Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
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Klarus 21GT-50 21700 5000 mAh Rechargeable Battery

$35.00
$43.25
$35.00
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Fenix HP12R-T rechargeable LED headlamp with 1300 lumens brightness for running, work, and outdoor activities
Shipping information

🇨🇦 Shipping Policy – Canada

✅ Free Shipping on orders over $150 CAD (before taxes) within most regions of Canada.

📦 For orders under $150 CAD, we charge a flat shipping rate of $13.75.

🚫 Please note: Free shipping does not apply to orders shipped to Nunavut, Northwest Territories, or Yukon.
For these regions, a flat shipping rate starting at $18.95 CAD will apply, depending on package weight and dimensions.

We always aim to process and ship your order quickly and efficiently, with tracking included on all shipments within Canada.
Returns policy

If you wish to return a product, you must first contact our customer service team for return authorization. Please email us at support@flashlightworld.com with your order details, and we will guide you through the return process.

You may return new, unused, and unopened items within 10 days of delivery for a refund. Returned products must be in perfect, resalable condition, including all original packaging and accessories.

🔹 Initial shipping fees are non-refundable.
🔹 If your order originally qualified for free shipping, but you return an item and the remaining total falls below $150 CAD, the original shipping fee will be deducted from your refund.
🔹 All returns must be pre-approved by our team via email before being sent back.

For assistance, please reach out to:
📧 support@flashlightworld.com

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Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices
Klarus 21GT-50 21700 5000mAh rechargeable Li-ion battery for flashlights, headlamps, and other high-performance electronic devices

Product Details

PRODUCT DESCRIPTION

Using professional 21700 5000mAh cell core

  • 21GT-50 Battery
  • A quality, reliable, high performance cell
  • Capacity up to 5000 mAh, max discharge current up to 15A
  • Built-in short circuit protection
  • Rating voltage: 3.6V
  • Rating capacity: 5000 mAh
  • Charge/discharge lifespan: 500 times

The voltage of full charge and ischarge is 4.2V and 2.75V

SPECIFICATIONS

  • Brand: Klarus
  • Size: 21700
  • Capacity: 5000mAh
  • Discharge Rating: 15A
  • Nominal Voltage: 3.63V
  • Rated Capacity: 4.90Ah
  • Wh Rating: 17.787Wh
  • Terminal Type: Button Top

Reccomended battery for the Klarus XT21X

We are unable to accept returned batteries once they have been opened, so please ensure they are the correct cell for your device before ordering.

Delivery Information

🚚 Order Processing & Shipping Timeframes

We take pride in getting your order out quickly and efficiently.
* Orders are shipped within 24 to 48 business hours after payment confirmation.
* Our fulfillment center is located in the Province of Quebec, Canada.

📦 Standard Shipping:
Estimated delivery within 1–7 business days, depending on your location in Canada.

⚡️ Express Shipping:
Estimated delivery in 2–3 business days.

You’ll be able to choose the best shipping option for your needs at checkout, where real-time rates and estimated delivery times are shown based on your delivery address.

Customer Service

Happy to chat! Feel free to contact us using our form or chat service. Our hours of operations are from 10:00 am to 3:00 pm Eastern Time, Monday to Friday, not including Holidays.

What People Are Saying

Fenix HMR65R-T V2.0 Review

Super stoked on the new V2.0 version of this headlamp. The new ratchet system is a great improvement. The update headband is fantastic. And the purple colour scheme is super cool. I’ve owned multiple Fenix lights over the past few years and I won’t consider any other brand for future purchase. Happy customer.

Mitchel K.
Love my Nitecore Tini 3!

V-Awesome ‘lil keychain flashlight !!
Intuitive.
Very functional.
More than just a trinket ‘keychain flashlight’.
Nitecore quality.

—‘FLASHLIGHT WORLD’ is reputable, service oriented & is a decent vendor.. ..Kudos!!

Martin H.
Pocket size protection

There are five reasons why I purchased this Klarus XT1C flashlight. It can be programmed for one button instant strobe. One,Defense from bears or people. Two, Offence, red light keeps you hidden at night. Three, USB-c battery usually an upgrade. Four, small pocket sized and five, Klarus is a good brand name.

Rob M.
Acebeam P20

Amazing quality. A powerful robust flashlight that suits my needs in the field of hunting and outdoor survival. Flashlight world were friendly and answered all my questions promptly. Great service.

Claudio C.
Another first time customer

Fenix ARB-L21-5000U Li-ion Rechargeable 21700 Battery with USB-C Charging Port.
I bought two of these batteries to add to the one that came with my flashlight.
Very happy with the original so I expect these will be the same.
Good customer service and quick delivery. Happy customer. Thanks.

Derek R.