--- product_id: 460025222 title: "Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor, Copper" brand: "fenix" price: "64.45 DT" currency: TND in_stock: true reviews_count: 11 category: "Fenix" url: https://www.desertcart.tn/products/460025222-fenix-alf-18-battery-holder-18650-to-21700-adaptor-copper store_origin: TN region: Tunisia --- # Copper-plated contacts for max conductivity Converts 18650 to 21700 size Durable PC & ABS plastic build Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor, Copper **Brand:** fenix **Price:** 64.45 DT **Availability:** βœ… In Stock ## Summary > πŸ”Œ Power up smarter: adapt, save, and never run out! ## Quick Answers - **What is this?** Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor, Copper by fenix - **How much does it cost?** 64.45 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/460025222-fenix-alf-18-battery-holder-18650-to-21700-adaptor-copper) ## Best For - fenix enthusiasts ## Why This Product - Trusted fenix brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Lightweight & Durable:** Crafted from robust PC and ABS plastics, weighing just 10 grams for easy portability. - β€’ **Optimized Conductivity:** Copper-plated contacts ensure efficient power transfer and minimal energy loss. - β€’ **Ready for Any Adventure:** Perfect for outdoor activities, emergency kits, and household tasksβ€”power on demand. - β€’ **Cost-Effective Power Solution:** Extend the life of your existing battery stash and save money by avoiding new 21700 batteries. - β€’ **Universal Battery Compatibility:** Seamlessly use your 18650 batteries in 21700-powered devices without extra purchases. ## Overview The Fenix ALF-18 Battery Holder is a precision-engineered adapter that allows 18650 lithium-ion batteries to fit and function in 21700 battery-powered devices. Featuring copper-plated contacts for superior conductivity and a durable PC/ABS plastic shell, this lightweight 10-gram adapter offers a cost-effective and reliable power solution for outdoor enthusiasts, emergency preparedness, and everyday use. Batteries not included. ## Description From the manufacturer Fenix ALF-18 18650-21700 Adaptor The Fenix ALF-18 battery adapter allows the use of 18650 batteries in 21700 battery powered torches. Made from PC and ABS plastics this adapter is the size of a 21700 battery and its internal bore fits the smaller 18650 battery. The adapter features copper plated contacts for excellent conductivity. Please note that as 18650 batteries have lower capacity than 21700 batteries run times in your application will be correspondingly shorter. Batteries are not supplied in this product. Review: Spot on - I was dubious about purchasing this as I didn't think it would work at all and surprisingly it does, it sits perfectly in my Perun 2 OLIGHT head torch as I only had 1 21700 battery which is on it's way out and had a stash of 18650's from a previous head torch, this converts my 18650s with ease and saves me having to buy yet more batteries for my head torch and the batteries i have are high capacity and will ensure longevity Review: Good fit - Very pleased can use smaller battery now , money saving. ## Features - Battery Adapter - Fits 21700 sized torches - Holds 18650 sized batteries - Batteries are not included - Made from PC and ABS plastics. The adapter features copper plated contacts for excellent conductivity. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08YMHM43S | | Antenna Location | Outdoor activities, emergency preparedness, household tasks | | Battery Cell Type | Lithium Ion | | Battery cell composition | Lithium Ion | | Best Sellers Rank | 53,136 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 49 in Battery Racks & Boxes | | Box Contents | Retail Packaged Fenix ALF-18 21700 / 18650 Battery Adapter | | Brand | fenix | | Brand Name | fenix | | Country of Origin | China | | Customer Reviews | 4.3 out of 5 stars 112 Reviews | | Item Type Name | Battery adaptor | | Item Weight | 10 Grams | | Item weight | 10 Grams | | Manufacturer | Fenix | | Model Name | Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor | | Model Number | ALF-18 | | Model name | Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor | | Product Warranty | 1 year manufacturer. | | Recommended uses for product | Outdoor activities, emergency preparedness, household tasks | | Unit Count | 1.0 count | | Unit count | 1.0 count | ## Product Details - **Special feature:** 18650 Battery Adapter for 21700 Flashlights - **Colour:** Copper - **Power source:** Battery Powered - **Light source type:** LED - **Material:** PC and ABS plastics ## Images ![Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor, Copper - Image 1](https://m.media-amazon.com/images/I/51zhfWr7TmL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Spot on *by D***N on 11 January 2024* I was dubious about purchasing this as I didn't think it would work at all and surprisingly it does, it sits perfectly in my Perun 2 OLIGHT head torch as I only had 1 21700 battery which is on it's way out and had a stash of 18650's from a previous head torch, this converts my 18650s with ease and saves me having to buy yet more batteries for my head torch and the batteries i have are high capacity and will ensure longevity ### ⭐⭐⭐⭐⭐ Good fit *by J***C on 28 August 2024* Very pleased can use smaller battery now , money saving. ### ⭐⭐⭐⭐ Check before buying. *by P***L on 6 October 2023* Doesn't always work with every torch,so check before buying.Used this adapter with a Sofirn brand torch and Flat top 18650 batteries and worked fine.Not so with Olight,so check before purchase. --- ## 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.tn/products/460025222-fenix-alf-18-battery-holder-18650-to-21700-adaptor-copper](https://www.desertcart.tn/products/460025222-fenix-alf-18-battery-holder-18650-to-21700-adaptor-copper) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-28*