---
product_id: 561780284
title: "Janllenton 18V 10-Cell 21700 Battery Replacement Case for Milwaukee M18 48-11-1865 - DIY Repair Kit for 6.0Ah and 8.0Ah Batteries (Battery Not Included)"
brand: "janllenton"
price: "€ 53.95"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.pt/products/561780284-janllenton-18v-10-cell-21700-battery-replacement-case-for-milwaukee
store_origin: PT
region: Portugal
---

# durable premium plastic case 10-cell 21700 battery config DIY repair & custom assembly Janllenton 18V 10-Cell 21700 Battery Replacement Case for Milwaukee M18 48-11-1865 - DIY Repair Kit for 6.0Ah and 8.0Ah Batteries (Battery Not Included)

**Brand:** janllenton
**Price:** € 53.95
**Availability:** ✅ In Stock

## Summary

> 🔧 Power up your Milwaukee M18 with DIY precision and durability!

## Quick Answers

- **What is this?** Janllenton 18V 10-Cell 21700 Battery Replacement Case for Milwaukee M18 48-11-1865 - DIY Repair Kit for 6.0Ah and 8.0Ah Batteries (Battery Not Included) by janllenton
- **How much does it cost?** € 53.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/561780284-janllenton-18v-10-cell-21700-battery-replacement-case-for-milwaukee)

## Best For

- janllenton enthusiasts

## Why This Product

- Trusted janllenton brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Empower Your DIY Skills:** Designed for pros and enthusiasts ready to take control of battery performance and longevity.
- • **Eco-Friendly & Cost-Savvy:** Repair instead of replace—save money and reduce electronic waste with this smart solution.
- • **Robust & Reliable Housing:** Premium-grade plastic ensures your battery cells stay protected and durable under pressure.
- • **Custom Battery Assembly Ready:** Build or rebuild your battery pack tailored to your power needs with this versatile case.
- • **Precision Fit for Milwaukee M18:** Seamlessly compatible with 48-11-1865 6.0Ah & 8.0Ah batteries for a perfect upgrade or repair.

## Overview

This 18V 10-cell 21700 battery replacement case is a durable, premium plastic housing designed specifically for Milwaukee M18 48-11-1865 batteries (6.0Ah and 8.0Ah). Ideal for experienced users, it enables cost-effective DIY repair or custom battery assembly, extending battery life and reducing waste. Battery cells are not included.

## Description

Plastic case and charging protection circuit board for broken Milwaukee M18 Li-ion batteries replacement.  (Battery not included)  The package includes the following items; Plastic battery replacement case housing PCB Circuit Board 9 Screws 6 Nickel Plates Stickers Compatible with most Milwaukee 18V Batteries and Milwaukee M18 Chargers. Please check your model number and the following compatible models;   Compatible Battery Pack Models;  48-11-1865 48-11-1880 Compatible Battery Charger Models;  48-59-1802 48-59-1806 48-59-1807 48-59-1808 48-59-1810 48-59-1811 48-11-1882

## Features

- Compatible Replacement for Milwaukee M18 Batteries: Specifically designed for 10-cell 21700 battery configurations, this plastic housing kit fits Milwaukee M18 models, including 48-11-1865 18V 6.0Ah and 8.0Ah batteries. (Battery cells not included.)
- DIY Battery Repair and Assembly: Ideal for repairing damaged battery cases or assembling custom battery packs tailored to your specific needs. Perfect for professionals and DIY enthusiasts.
- For Experienced Users: Recommended for individuals with knowledge of battery performance and practical experience in battery assembly to ensure safe and efficient use. (A welder is required.)
- Durable Plastic Construction: Crafted from premium-grade plastic for enhanced durability, providing reliable protection and a robust housing for battery cells.
- Cost-Effective Solution: Save money and reduce waste by repairing or upgrading your existing Milwaukee M18 battery instead of purchasing a new one.

## Product Details

- **Number of Batteries:** 1 Lithium Ion batteries required.
- **Brand:** Janllenton
- **Battery Cell Composition:** Lithium
- **Battery Capacity:** 6000 Milliamp Hours
- **Recommended Uses For Product:** Power Tool

## Images

![Janllenton 18V 10-Cell 21700 Battery Replacement Case for Milwaukee M18 48-11-1865 - DIY Repair Kit for 6.0Ah and 8.0Ah Batteries (Battery Not Included) - Image 1](https://m.media-amazon.com/images/I/61Vk-IYfLxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent addition to the workshop
*by L***S on June 20, 2025*

This is a great product, I had a number of 21700 cells in my shop, and with this kit put together a massive 8 amp hour battery for my Milwaukee drill. You need a spot welder to connect the batteries like this one: https://www.amazon.com/dp/B0BJPBC9WS?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1

### ⭐⭐⭐⭐ Best to use a spot welder otherwise Flux must be used to make solder stick
*by J***Y on October 5, 2024*

The product worked once I followed the youtube video, slowed it down to about 25% speed, and soldered the plates onto the batteries and connected them to the control board. A spot welder is not required but HIGHLY encouraged. Trying to solder onto lithium batteries (not included) can be very challenging. If you do not have rosin flux you will NEED to buy some or make your own. Solder will NOT stick to these batteries or the included plates without it. An easy home DIY recipe for soldering flux is to use a 1:1 mixture of rubbing alcohol and phosphoric acid which is the main ingredient in some rust stop and rust removers. Check the label to be certain it contains phosphoric acid. You can use Baking soda and water to stop the acid and clean it off afterwards. This is will allow your solder to stick to your battery ends. Set your solder iron to near maximum temperature (800-850F), use a wide/large tip and minimize the amount of time you apply heat to the batteries. No more than a 2-3 seconds at a time. Apply a thin layer of your flux solution to all metal you wish to solder onto and watch the video on assembly of the rebuild kit. There is a QR code included on the instructions. Take GREAT care not to touch groups of batteries to each other with your metal tools or the plates otherwise you will instantly burn up and ruin your project. You can purchase a simple spot welder on amazon for around $40 which will make the rebuild fast and easy. Good luck. I do recommend this product.

### ⭐⭐⭐⭐⭐ Great fitment
*by M***S on February 2, 2025*

For great shipped fast

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-01-23*