--- product_id: 166027929 title: "10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery | Solder Belt,Silk-Screened PCB Labels (B+,B-,P+,P-),for Building Custom Battery Packs Garden Solar Lights and on-the-go Power" brand: "koobook" price: "9820CFA" currency: XOF in_stock: true category: "Koobook" url: https://www.desertcart.sn/products/166027929-10pcs-3a-bms-protection-board-for-1s-3-7v-18650 store_origin: SN region: Senegal --- # 2A continuous current limit 4.2V precise charging voltage Multi-layer battery protection 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery | Solder Belt,Silk-Screened PCB Labels (B+,B-,P+,P-),for Building Custom Battery Packs Garden Solar Lights and on-the-go Power **Brand:** koobook **Price:** 9820CFA **Availability:** ✅ In Stock ## Summary > 🛠️ Build smarter, power safer — never miss a charge! ## Quick Answers - **What is this?** 10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery | Solder Belt,Silk-Screened PCB Labels (B+,B-,P+,P-),for Building Custom Battery Packs Garden Solar Lights and on-the-go Power by koobook - **How much does it cost?** 9820CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/166027929-10pcs-3a-bms-protection-board-for-1s-3-7v-18650) ## Best For - koobook enthusiasts ## Why This Product - Trusted koobook brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Versatile:** Slim 30x3.7x2.2mm PCB fits seamlessly into custom 1S 18650 battery builds. - • **Power with Precision:** Engineered for exact 4.2V charging to maximize battery life and performance. - • **Safety First, Always:** Integrated overcharge, overdischarge, short circuit, and overcurrent protections keep your battery pack secure. - • **Plug & Play Confidence:** Silk-screened PCB labels (B+, B-, P+, P-) ensure foolproof wiring every time. - • **Bulk Ready for Builders:** Pack of 10 boards to power up multiple projects or scale your solar and portable power solutions. ## Overview The KOOBOOK 10pcs 3A BMS Protection Board is a compact, reliable battery management system designed for 1S 3.7V 18650 Li-ion batteries. Featuring precise 4.2V charging, 2A continuous current handling, and comprehensive safety protections including overcharge, overdischarge, short circuit, and overcurrent safeguards, it ensures optimal battery performance and longevity. Ideal for custom battery packs in garden solar lights and portable power devices, this set of 10 boards comes with clear silk-screened PCB labels for easy installation and stable, low current consumption operation. ## Description Specifications: Over charge release voltage: 4.23±0.05V Over charging voltage range: 4.25±0.05V Over discharge voltage range: 2.45±0.1V Upper limit continuous current: 2A Overcurrent detection current: 2.5A Charging voltage: 4.2V IC component: DW01+8205A Size: approx.30*3.7*2.2mm Connection description: B+ connect to battery+ B- connect to battery- P+ for battery output input+ P- for battery output input- Note: Manual measurement, with small error. Please check size in detail before purchase. Real colors may slightly differ from the pictures, as it depends on specific monitor settings and light brightness. We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Includes: 10Pcs ## Features - With over charge, over discharge, short circuit, over current protection function, for a variety of different shapes of 3.N capacity lithium batteries. - Suitable for many requirements of high integration, low cost occasions. - Can meet the performance requirements of many aspects, to ensure, the absolute safety of the battery group. - Low current consumption,stable performance. - Strictly follow the diagram wiring, do not intentionally short-circuit! After the line is connected, you need to charge first, then there will be output. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07W75BQWW | | Best Sellers Rank | #53,670 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #37 in Lab Power Supplies #71 in Life Science Supplies | | Brand | KOOBOOK | | Color | Green | | Customer Reviews | 4.4 4.4 out of 5 stars (150) | | Input Voltage | 3.7 volts | | Item Weight | 0.01 kg | | Manufacturer | KOOBOOK | | Mfr Part Number | KB457 | | Model Number | KB457 | | Number of Items | 10 | | Number of Outlets | 10 | | Output Voltage | 3.7 volts | | Plug Type | Type A | | Power Source | rechargeable battery | | UPC | 797805999058 | | Unit Count | 10 Count | ## Product Details - **Brand:** KOOBOOK - **Color:** Green - **Input Voltage:** 3.7 volts - **Item Weight:** 0.01 kg - **Output Voltage:** 3.7 volts ## Images ![10pcs 3A BMS Protection Board for 1S 3.7V 18650 Li-ion Battery | Solder Belt,Silk-Screened PCB Labels (B+,B-,P+,P-),for Building Custom Battery Packs Garden Solar Lights and on-the-go Power - Image 1](https://m.media-amazon.com/images/I/61qawjMYboL.jpg) ## Questions & Answers **Q: How do I connect these for 24 volts using 14 18650 batteries? 7 in series, 2 groups in parallel.** A: I recommend to use 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board Know as a BMS. search for DIY 18650 battery pack **Q: What is the max input voltage? Would 5v be ok** A: 5v input should be fine. The battery will be allowed to charge till a battery measure of 4.25 is reached, then the circuit will disconnect your 5v input from the battery. ## Frequently Bought Together - KOOBOOK 10pcs 3A BMS Protection Board with Solder Belt for 1S 3.7V 18650 Li-ion Lithium Battery Cell Kit - RAKwireless WisBlock Meshtastic Starter Kit US915 Base RAK19007 + Core RAK4631 - 18650 Battery Case Holder, 4 Pcs 2 Slots x 3.7V DIY Battery Storage Box, in Parallel Black Plastic Batteries Case for 2 x 18650 Ltvystore --- ## 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.sn/products/166027929-10pcs-3a-bms-protection-board-for-1s-3-7v-18650](https://www.desertcart.sn/products/166027929-10pcs-3a-bms-protection-board-for-1s-3-7v-18650) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-08-21*