--- product_id: 558911656 title: "Replacement Battery Case Housing for Milwaukee M18 48-11-1865 18V – 10-Cell 21700 DIY Repair Shell Kit (Battery Not Included)" brand: "janllenton" price: "€ 90.34" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.it/products/558911656-replacement-battery-case-housing-for-milwaukee-m18-48-11-1865 store_origin: IT region: Italy --- # durable premium plastic case 10-cell 21700 battery config DIY repair & custom assembly Replacement Battery Case Housing for Milwaukee M18 48-11-1865 18V – 10-Cell 21700 DIY Repair Shell Kit (Battery Not Included) **Brand:** janllenton **Price:** € 90.34 **Availability:** ✅ In Stock ## Summary > 🔧 Power up your toolkit with smart, sustainable battery repair! ## Quick Answers - **What is this?** Replacement Battery Case Housing for Milwaukee M18 48-11-1865 18V – 10-Cell 21700 DIY Repair Shell Kit (Battery Not Included) by janllenton - **How much does it cost?** € 90.34 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/558911656-replacement-battery-case-housing-for-milwaukee-m18-48-11-1865) ## 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 - • **Eco-Friendly Fix:** Reduce waste by extending the life of your Milwaukee M18 power source - • **Empower Your DIY Skills:** Perfect for pros and enthusiasts ready to rebuild and customize - • **Robust & Reliable Housing:** Premium-grade plastic ensures long-lasting battery protection - • **Cost-Saving Battery Revival:** Upgrade or repair without the premium price tag of new batteries - • **Precision Fit for Milwaukee M18:** Seamlessly compatible with 48-11-1865 6.0Ah & 8.0Ah batteries ## Overview This Janllenton replacement case is designed for Milwaukee M18 18V batteries with 10-cell 21700 configurations, compatible with 6.0Ah and 8.0Ah models. Crafted from durable plastic, it enables DIY enthusiasts and professionals to repair or customize battery packs, offering a cost-effective and eco-conscious alternative to buying new batteries. Note: battery cells and welding tools are required separately. ## 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 Review: Fits perfect, functional as original. No problems. Review: We used this and some 21700 cells to craft a fully operational Milwaukee Tools 18V M8 battery. We tested it and it worked well and charged fine for routine work with a pole chainsaw and a leaf blower. The instructions were minimal, but if you are willing to do your own spot welds, the wiring diagram is probably enough for you. Some soldering is needed to attach the battery contacts to the BMS. The only challenge we had is that the terminal metal contacts were too thick to weld to one another with the small handheld portable spot welder we bought for purpose. The metal is pretty thick and Im not sure it is even nickel. We had to buy a more powerful spot welder to get that to work. At highest power, fully charged, it did the job. Spotwelding the batteries to the contacts was easier. We were new to this task. My son picked up the unit assembled with batteries but without the welds in place. One of the battery contacts shifted over and developed a short with the one next to it, quickly burning my son's hand. After a week he had recovered so we decided to spot weld the thing once piece at a time more methodically with some tape to hold lose bits in place and things went well. This was a fun and painful learning experience for my son. I'm sure he'd do it again. T'was but a flesh wound. ## 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CGN7DFFL | | Item model number | JYX-M18 | | Manufacturer | Janllenton, Inc | | Product Dimensions | 12.7 x 7.62 x 7.62 cm; 208.65 g | ## Product Details - **Battery capacity:** 6 Amp Hours - **Battery cell composition:** Lithium - **Brand:** Janllenton - **Number of batteries:** 1 Lithium Ion batteries required. - **Recommended uses for product:** Power Tool ## Images ![Replacement Battery Case Housing for Milwaukee M18 48-11-1865 18V – 10-Cell 21700 DIY Repair Shell Kit (Battery Not Included) - Image 1](https://m.media-amazon.com/images/I/61Vk-IYfLxL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***M on 25 September 2025* Fits perfect, functional as original. No problems. ### ⭐⭐⭐⭐ Review *by I***N on 11 April 2024* We used this and some 21700 cells to craft a fully operational Milwaukee Tools 18V M8 battery. We tested it and it worked well and charged fine for routine work with a pole chainsaw and a leaf blower. The instructions were minimal, but if you are willing to do your own spot welds, the wiring diagram is probably enough for you. Some soldering is needed to attach the battery contacts to the BMS. The only challenge we had is that the terminal metal contacts were too thick to weld to one another with the small handheld portable spot welder we bought for purpose. The metal is pretty thick and Im not sure it is even nickel. We had to buy a more powerful spot welder to get that to work. At highest power, fully charged, it did the job. Spotwelding the batteries to the contacts was easier. We were new to this task. My son picked up the unit assembled with batteries but without the welds in place. One of the battery contacts shifted over and developed a short with the one next to it, quickly burning my son's hand. After a week he had recovered so we decided to spot weld the thing once piece at a time more methodically with some tape to hold lose bits in place and things went well. This was a fun and painful learning experience for my son. I'm sure he'd do it again. T'was but a flesh wound. ### ⭐⭐⭐⭐⭐ Review *by V***R on 21 January 2026* Works --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.it/products/558911656-replacement-battery-case-housing-for-milwaukee-m18-48-11-1865](https://www.desertcart.it/products/558911656-replacement-battery-case-housing-for-milwaukee-m18-48-11-1865) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-09*