---
product_id: 463459761
title: "Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor"
brand: "fenix"
price: "¥4535"
currency: JPY
in_stock: true
reviews_count: 5
url: https://www.desertcart.jp/products/463459761-fenix-alf-18-battery-holder-18650-to-21700-adaptor
store_origin: JP
region: Japan
---

# Copper-plated contacts for max conductivity Converts 18650 to 21700 Durable PC & ABS plastic build Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor

**Brand:** fenix
**Price:** ¥4535
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your gear, don’t get left behind!

## Quick Answers

- **What is this?** Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor by fenix
- **How much does it cost?** ¥4535 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/463459761-fenix-alf-18-battery-holder-18650-to-21700-adaptor)

## 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

- • **Trusted by Pros:** Join thousands of users enjoying a 4.4-star rated, reliable battery adapter from Fenix.
- • **Compact Convenience:** Slim, retail-packaged design fits perfectly in your gear bag for on-the-go power solutions.
- • **Lightweight & Durable:** Crafted from premium PC and ABS plastics, built to withstand daily hustle at just 10 grams.
- • **Effortless Conductivity:** Copper-plated contacts ensure lightning-fast energy transfer for peak performance.
- • **Universal Power Upgrade:** Seamlessly use your trusted 18650 batteries in 21700 devices without missing a beat.

## Overview

The Fenix ALF-18 Battery Holder adapts 18650 lithium-ion batteries for use in 21700-sized devices, featuring copper-plated contacts for superior conductivity and a durable PC/ABS plastic construction. Weighing only 10 grams, it’s a lightweight, reliable solution favored by professionals and outdoor enthusiasts alike.

## Description

See Below

## 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 |
|---------------|-------|
| Antenna Location | Outdoor activities, emergency preparedness, household tasks |
| Asin | B08YMHM43S |
| Battery Cell Type | Lithium Ion |
| Best Sellers Rank | #77,801 in Electronics (See Top 100 in Electronics) #130 in Household Battery Holders |
| Brand | Fenix |
| Customer Reviews | 4.4 4.4 out of 5 stars (115) 4.4 out of 5 stars |
| Included Components | Retail Packaged Fenix ALF-18 21700 / 18650 Battery Adapter |
| Item Type Name | Battery adaptor |
| Item Weight | 10 Grams |
| Manufacturer | Fenix |
| Model Name | Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor |
| Model Number | ALF-18 |
| Unit Count | 1.0 Count |

## Product Details

- **Battery cell composition:** Lithium Ion
- **Brand:** fenix
- **Model name:** Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor
- **Recommended uses for product:** Outdoor activities, emergency preparedness, household tasks
- **Unit count:** 1.0 Count

## Images

![Fenix ALF-18 Battery Holder 18650 to 21700 Adaptor - Image 1](https://m.media-amazon.com/images/I/51zhfWr7TmL.jpg)

## Customer Reviews

### ⭐ Did not work
*by  on Reviewed in Sweden 12 May 2024*

Did not work with 21700

### ⭐⭐⭐ Çok pahalı
*by  on Reviewed in Turkey 19 August 2024*

Ürün iş görüyor, sorun yok. Çok çok basit bir ürün. Ama gerçekten çok pahalı. Bu fiyata 3-4 adet 18650 pil alınır yada 2 tane 21700 pil alınır. Almış bulunduk bir kere.

### ⭐⭐⭐ 18650が21700として使用できました。
*by  on Reviewed in Japan 23 May 2026*

電池のストックを減らすために18650を21700として使用するために購入。ランタイム減少とと接触不良の危惧は有りますが使用できました。TK20R V2.0とTK25Rの2機種で使用中です。数量限定?廃盤?の可能性があります。必要なら早めに購入をお勧めします。

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**Shop now:** [https://www.desertcart.jp/products/463459761-fenix-alf-18-battery-holder-18650-to-21700-adaptor](https://www.desertcart.jp/products/463459761-fenix-alf-18-battery-holder-18650-to-21700-adaptor)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-29*