--- product_id: 568742880 title: "4 pcs 3S 40A PCB Protection Board 18650 Lithium Battery Protection Board Li-ion Lithium Battery Charger PCB BMS 11.1V 12V 12.6V with Balance Charging with Nickel strip" brand: "youmile" price: "88.26 DT" currency: TND in_stock: true url: https://www.desertcart.tn/products/568742880-4-pcs-3s-40a-pcb-protection-board-18650-lithium-battery store_origin: TN region: Tunisia --- # 40A max continuous discharge current Supports 3S Li-ion battery packs (11.1V - 12.6V) Multi-layer protection: overcharge, overdischarge, overcurrent, short circuit 4 pcs 3S 40A PCB Protection Board 18650 Lithium Battery Protection Board Li-ion Lithium Battery Charger PCB BMS 11.1V 12V 12.6V with Balance Charging with Nickel strip **Brand:** youmile **Price:** 88.26 DT **Availability:** ✅ In Stock ## Summary > 🛡️ Power up with confidence — your battery’s ultimate guardian! ## Quick Answers - **What is this?** 4 pcs 3S 40A PCB Protection Board 18650 Lithium Battery Protection Board Li-ion Lithium Battery Charger PCB BMS 11.1V 12V 12.6V with Balance Charging with Nickel strip by youmile - **How much does it cost?** 88.26 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/568742880-4-pcs-3s-40a-pcb-protection-board-18650-lithium-battery) ## Best For - youmile enthusiasts ## Why This Product - Trusted youmile brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Compatibility:** Works seamlessly with lithium-ion, ternary, manganese acid, and cobalt acid batteries - • **Balance Charging Mastery:** Ensures balanced charging across all 3 cells, extending battery lifespan and reliability - • **Precision Voltage Control:** Maintains safe charging voltage between 12.6V and 13.6V for optimal battery health - • **Comprehensive Safety Suite:** Built-in overcharge, overdischarge, overcurrent, and short circuit protections to prevent costly failures - • **Powerhouse Current Handling:** Handles up to 40A continuous discharge for high-performance battery packs ## Overview The Youmile 3S 40A PCB Protection Board is a compact, high-performance battery management system designed for 11.1V lithium-ion packs. It delivers up to 40A continuous discharge current with precise voltage regulation and multi-layer safety protections including overcharge, overdischarge, overcurrent, and short circuit prevention. Featuring balance charging and broad battery chemistry compatibility, it ensures safer, longer-lasting battery operation for professional-grade applications. ## Description 4 pcs 3S 40A PCB Protection Board 18650 Lithium Battery Protection Board Li-ion Lithium Battery Charger PCB BMS 11.1V 12V 12.6V with Balance Charging with Nickel strip ## Features - 【What it does】: The 3S 40A protection board can effectively prevent various problems encountered when charging the battery and avoid accidents. - 【Multiple protection】: The protection board has precise overcharge protection, over discharge protection, overcurrent protection, short circuit protection and other protection functions. - 【Current and voltage】: Charging voltage: DC 12.6V~13.6V;Continuous discharge current: maximum 40A (if the heat dissipation environment is not good, please reduce the load current);Continuous charging current: maximum 20A. - 【Note】: Do not mix good batteries and bad batteries together, and new and old batteries can't be used together.Strictly according to the diagram wiring，0V/4.2V/8.4V/12.6V. - 【Scope of application】: The protection board is suitable for lithium-ion batteries, and can also be used for ternary batteries, manganese acid batteries, and cobalt acid batteries. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Youmile | | Part number | JK-YM-689 | | Item Weight | 50 g | | Product Dimensions | 45 x 45 x 45 cm; 50 g | | Item model number | JK-YM-689 | | Colour | green | | Specification met | CE | | Batteries included? | No | | Batteries Required? | No | ## Product Details - **Brand:** Youmile - **Colour:** green - **Output voltage:** 13.6 Volts (DC) - **Specification met:** CE - **Input voltage:** 13.6 Volts (DC) ## Images ![4 pcs 3S 40A PCB Protection Board 18650 Lithium Battery Protection Board Li-ion Lithium Battery Charger PCB BMS 11.1V 12V 12.6V with Balance Charging with Nickel strip - Image 1](https://m.media-amazon.com/images/I/818HcwDkeHL.jpg) ## Frequently Bought Together - Youmile 4 pcs 3S 40A PCB Protection Board 18650 Lithium Battery Protection Board Li-ion Lithium Battery Charger PCB BMS 11.1V 12V 12.6V with Balance Charging with Nickel strip - Aideepen 3PCS 3S 20A Li-ion Lithium Battery Charger Board PCB BMS 12.6V Cell Module Overcharge Overcurrent Short Circuit Protection - Nickel Strip,0.15 * 27mm 10M 2P Nickel Strip for 18650 Battery Spot Welding Tape Ni Plate,Used for 2 Parallel 18650 Batteries Spot Welding DIY 18650 Battery Pack, 20.25mm Spacing --- ## 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.tn/products/568742880-4-pcs-3s-40a-pcb-protection-board-18650-lithium-battery](https://www.desertcart.tn/products/568742880-4-pcs-3s-40a-pcb-protection-board-18650-lithium-battery) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-08*