--- product_id: 742604485 title: "Carbon Battery 6K Kit Headlamp Runtime Extender for NU40, NU43, NU45, NU50, and HC65 UHE Headlamps" brand: "nitecore" price: "21685 kr" currency: ISK in_stock: true reviews_count: 5 category: "Nitecore" url: https://www.desertcart.is/products/742604485-carbon-battery-6k-kit-headlamp-runtime-extender-for-nu40-nu43 store_origin: IS region: Iceland --- # Up to 3x runtime boost Lightweight 3oz carbon fiber Rear red safety signal light Carbon Battery 6K Kit Headlamp Runtime Extender for NU40, NU43, NU45, NU50, and HC65 UHE Headlamps **Brand:** nitecore **Price:** 21685 kr **Availability:** βœ… In Stock ## Summary > πŸ”¦ Power through the night with runtime that won’t quit! ## Quick Answers - **What is this?** Carbon Battery 6K Kit Headlamp Runtime Extender for NU40, NU43, NU45, NU50, and HC65 UHE Headlamps by nitecore - **How much does it cost?** 21685 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/742604485-carbon-battery-6k-kit-headlamp-runtime-extender-for-nu40-nu43) ## Best For - nitecore enthusiasts ## Why This Product - Trusted nitecore brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Featherlight Carbon Design:** Just over 3 ounces for balanced, all-day comfort without the bulk. - β€’ **Plug & Play USB-C Charging:** Fast, universal charging with included USB-C cable for hassle-free power-ups. - β€’ **Triple Your Adventure Time:** Doubles or triples your Nitecore headlamp runtime for unstoppable illumination. - β€’ **Safety First, Even in the Dark:** Integrated rear red light ensures you're visible during night runs or outdoor work. - β€’ **Seamless Quick-Release Connection:** Secure, tangle-free cable clip keeps your setup sleek and reliable. ## Overview The Nitecore Carbon Battery 6K Kit is a lightweight carbon fiber runtime extender designed for select Nitecore headlamps (NU40, NU43, NU45, NU50, HC65 UHE). It doubles or triples your headlamp’s battery life by powering the light first from its high-capacity lithium-ion battery. Featuring a quick-release cable, USB-C charging, and a rear red safety light, this kit balances comfort and performance for professionals and outdoor enthusiasts who demand extended illumination without compromise. ## Description The Nitecore Carbon Battery 6K runtime extender Kit can double or triple the runtime of Nitecore headlamps such as the NU40, NU43, NU45, NU50, and HC65 UHE. By connecting directly to the headlamp, the Carbon 6K Battery Kit activates the headlamps' Performance Mode, ensuring long-lasting illumination and stronger brightness. It first draws power from the battery kit, maximizing its runtime before utilizing the headlamp's internal battery. Weighing just over three ounces, its well-balanced design offers optimal weight distribution for a comfortable and secure wearing experience.The Carbon Battery 6K Kit features a USB-C port for easy connection and charging, along with a quick-release clip that ensures a secure connection between the charging port, headlamp, and battery, guaranteeing reliable charging. To check the remaining power, simply short-press the Power Button to illuminate the three red power indicators. Additionally, for added safety, the kit includes a rear red light that serves as a signal light at night. Review: I think I've just come to enjoy this brand for the function, value and overall aesthetic of the system. Here is a headlamp system (battery + headband) which I gladly purchased (twice now) to outfit two, HC65 UHE headlamps I bought earlier. One headlamp is my back-up... as some of us search-and-rescue folks tend to like reliable gear (in pairs). I don't have a longevity review yet... But I will add that extra bit of information as more time passes and I've used the system under a variety of situations. I can say though, after at least 2-months of regular use (both short and extended) that I like it. The standard set up for the HC65 UHE is great. No complaints. Battery life is wonderful (providing bright, adjustable light and reliability). But just knowing that I'm drawing from the extra battery on the backside of this kit (FIRST) gives me great piece-of-mind when I'm out at night and need to illuminate an area hands-free... while on extended walks or runs. Having a fresh, primary battery inside the light itself just feels right. I've used this extra battery system in rainy, chilly autumn downpours and I'm still grinning ear-to-ear at the value this system provides me (and my dog) as we're out and about in unlit (and occasionally sketchy) areas. The connectors are solid. I've not had any issues with them coming loose at all, whether I've tossed this system in a tightly-compressed dry bag or a loose bag with other items bouncing around with it. The simple headband adjustability, forehead slipstrip and general headband aesthetic remain (as it should). The battery itself is very long lasting (more info to come there with longevity testing). I do love the red charging indicator (4 leds) that give you feedback on the staus of your charge. This doubles as a rear, blinking, caution light (or guide light if you're in a group)... Or you can opt out of that feature entirely and turn that part off. Nice. Nitecore, have you done it again? At least for THIS guy you have. Yes, you have. Thank you! Review: I've owned several headlamps and this is finally the best i have found. The battery life is great and it will stay on the high mode and not fade out after time. It's got good range and we love it for razor clam digging. Definitely work the money and buy the extra battery pack. ## Features - DOUBLES OR TRIPLES RUNTIME - When connected to the headlamp, the Nitecore Carbon 6K Kit significantly extends the run time of Nitecore Headlamps such as NU40, NU43, NU45, NU50, and HC65 HUE. - SECURE CONNECTION - Comes with a quick-release cable, reliably connecting the kit and headlamp, and clips to tuck the cable neatly around the headband. - LIGHTWEIGHT - Weighing just over three ounces, carbon 6K fits easily on the back of the headband for a balanced weight distribution and comfortable wearing experience - RED SAFETY LIGHT - A rear red light serves as a signal light at night, perfect for night runners or outdoor workers - CONTENTS - Carbon Battery 6K, Headband, Bracket, USB-C to USB-C charging cable, Nitecore Sticker ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D1HDS2K8 | | Batteries are Included | Yes | | Battery Description | Lithium-Ion | | Battery Type | Lithium Polymer | | Best Sellers Rank | 128,088 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 689 in Camping & Hiking Headlamps | | Brand Name | Nitecore | | Colour | Black | | Customer Reviews | 4.3 4.3 out of 5 stars (44) | | Finish | Polished | | Fixture Features | Adjustable Strap, Lightweight | | Included Components | Battery, Charging Cable, Clip, Head Band | | Item Dimensions D x W x H | 2.3D x 9W x 2.3H centimetres | | Item Dimensions L x W x H | 9L x 2.3W x 2.3H centimetres | | Item Shape | Headlamp Shape | | Item Type Name | headlamp runtime extender | | Item Weight | 100 g | | Light Output Maximum | 2000 Lumens | | Light Source Special Features | Performance Mode | | Manufacturer | Sysmax Innovations Co. | | Manufacturer Part Number | Carbon Battery 6K | | Material | Carbon Fiber | | Model Number | Carbon Battery 6K | | Mounting Type | Head Mount | | Number of Batteries | 1 Lithium Ion batteries required. (included) | | Number of Lights | 1 | | Power and Plug Description | Battery Powered | | Recommended Uses For Product | Extending the runtime of Nitecore headlamps | | Set Name | Kit | | Style | Modern | | Type of Bulb | LED | | Water Resistance Level | Water Resistant | | Wattage | 21.6 Watt-hours | | White Brightness | 2000 Lumens | ## Product Details - **Colour:** Black - **Light source type:** LED - **Material:** Carbon Fiber - **Power source:** Battery Powered - **Special feature:** Adjustable Strap, Lightweight ## Images ![Carbon Battery 6K Kit Headlamp Runtime Extender for NU40, NU43, NU45, NU50, and HC65 UHE Headlamps - Image 1](https://m.media-amazon.com/images/I/71L3BJXg05L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by 3***2 on 6 December 2025* I think I've just come to enjoy this brand for the function, value and overall aesthetic of the system. Here is a headlamp system (battery + headband) which I gladly purchased (twice now) to outfit two, HC65 UHE headlamps I bought earlier. One headlamp is my back-up... as some of us search-and-rescue folks tend to like reliable gear (in pairs). I don't have a longevity review yet... But I will add that extra bit of information as more time passes and I've used the system under a variety of situations. I can say though, after at least 2-months of regular use (both short and extended) that I like it. The standard set up for the HC65 UHE is great. No complaints. Battery life is wonderful (providing bright, adjustable light and reliability). But just knowing that I'm drawing from the extra battery on the backside of this kit (FIRST) gives me great piece-of-mind when I'm out at night and need to illuminate an area hands-free... while on extended walks or runs. Having a fresh, primary battery inside the light itself just feels right. I've used this extra battery system in rainy, chilly autumn downpours and I'm still grinning ear-to-ear at the value this system provides me (and my dog) as we're out and about in unlit (and occasionally sketchy) areas. The connectors are solid. I've not had any issues with them coming loose at all, whether I've tossed this system in a tightly-compressed dry bag or a loose bag with other items bouncing around with it. The simple headband adjustability, forehead slipstrip and general headband aesthetic remain (as it should). The battery itself is very long lasting (more info to come there with longevity testing). I do love the red charging indicator (4 leds) that give you feedback on the staus of your charge. This doubles as a rear, blinking, caution light (or guide light if you're in a group)... Or you can opt out of that feature entirely and turn that part off. Nice. Nitecore, have you done it again? At least for THIS guy you have. Yes, you have. Thank you! ### ⭐⭐⭐⭐⭐ Review *by A***. on 5 November 2025* I've owned several headlamps and this is finally the best i have found. The battery life is great and it will stay on the high mode and not fade out after time. It's got good range and we love it for razor clam digging. Definitely work the money and buy the extra battery pack. ### ⭐⭐⭐⭐⭐ Review *by R***2 on 8 March 2026* Fantastic upgrade for my Nitvor HC65 UHE. Very easy to use. Not too heavy on the head. Seems like it's durable and will last. So far, no issues ## Frequently Bought Together - Nitecore Carbon Battery 6K Kit Headlamp Runtime Extender for NU40, NU43, NU45, NU50, and HC65 UHE Headlamps - Nitecore NU53 1800 Lumen Headlamp, USB-C Fast Charging Long Runtime Lightweight Designed for Industrial uses with Auxilary White and Red Light Sticker - Nitecore NU43 Rechargeable Headlamp, 1400 lumens USB-C Bright Lightweight for Camping, Running, or Working, with Spotlight, Floodlight, Red Light, Including NitecoreS Sticker --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/742604485-carbon-battery-6k-kit-headlamp-runtime-extender-for-nu40-nu43](https://www.desertcart.is/products/742604485-carbon-battery-6k-kit-headlamp-runtime-extender-for-nu40-nu43) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-05-23*