--- product_id: 407081892 title: "ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell" brand: "aceirmc" price: "β‚©25196" currency: KRW in_stock: true reviews_count: 8 category: "Aceirmc" url: https://www.desertcart.kr/products/407081892-aceirmc-12pcs-1s-3-7v-4a-18650-charger-pcb-bms store_origin: KR region: South Korea --- # 4A max charge current 3.7V Li-ion battery support 4-layer multi-protection ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell **Brand:** aceirmc **Price:** β‚©25196 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Power up smart, protect smarter β€” never miss a charge! ## Quick Answers - **What is this?** ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell by aceirmc - **How much does it cost?** β‚©25196 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/407081892-aceirmc-12pcs-1s-3-7v-4a-18650-charger-pcb-bms) ## Best For - aceirmc enthusiasts ## Why This Product - Trusted aceirmc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Energy-Efficient Design:** Low standby current thanks to MOS transistor control maximizes battery life and reduces waste. - β€’ **Long-Lasting Durability:** Engineered for over 50,000 hours of reliable operation, built to keep your devices powered without fail. - β€’ **Ultimate Battery Safety:** Integrated overcharge, over-discharge, short circuit, and overcurrent protections guard your investment 24/7. - β€’ **Versatile Compatibility:** Perfect for 3.7V lithium batteries in massagers, solar lights, LED backups, and moreβ€”one board fits all. - β€’ **Precision Power Management:** High-accuracy voltage detection ensures your batteries charge safely and efficiently. ## Overview The ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board is a high-precision, durable battery management system designed for single-cell lithium-ion batteries. It features multi-layer safety protections including overcharge, over-discharge, short circuit, and overcurrent safeguards, ensuring optimal battery health. With low standby current and compatibility across various 3.7V battery applications, this board delivers reliable, long-lasting performance for professional-grade power solutions. ## Description desertcart.com: ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell : Electronics Review: Works as intended, but no overcurrent protection - Keep in mind these are to protect from over or under charging, but do not have overcurrent protection. I burned a couple out this way, that was my fault. Review: First-rate, Effective, Inexpensive - Super little boards. Grab your nickel strip spot welder and get to work! ## Features - HIGH-ACCURACY, HIGHLY DURABLE: High-accuracy voltage detection circuit, fine workmanship and durable, Effective life greater than 50000 hours. - MULTIPLE PROTECTION: Over-discharge protection, overcurrent protection, overcharge protection, short circuit protection; A combination of 4 safety features that work together to provide ultimate protection - LOW STANDBY CURRENT: MOS transistor can control the battery charge and discharge, low standby current consumption. - WIDELY APPLICATIONS: Use for variety of capacities and various shapes 3.7V lithium batteries,Massager battery pack, LED light backup power supply, solar street light battery pack, monitor standby power supply, etc. - ATTENTION: Strictly according to the diagram wiring: B+: connected battery positive, B-: connect to battery negative, P+: connection charge / discharge positive, P- connection charge / discharge negative, Otherwise it will cause damage to the chip. After connection,it need to first charge activation, then will have the output. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09B1VY1BY | | Best Sellers Rank | #136,135 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #557 in Power Converters | | Brand | ACEIRMC | | Color | green black | | Customer Reviews | 4.8 out of 5 stars 47 Reviews | | Input Voltage | 3.7 volts | | Manufacturer | ACEIRMC | | Model Number | 4fba7e28-a726-4f73-9e65-03b31eec2a50 | | Output Voltage | 4.2 volts | | Plug Format | Type B | | Plug Type | Type B | | UPC | 701715479210 | | Unit Count | 12 Count | | Warranty Description | 1 | ## Product Details - **Brand:** ACEIRMC - **Color:** green black - **Input Voltage:** 3.7 Volts - **Output Voltage:** 4.2 Volts - **Plug Format:** Type B ## Images ![ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell - Image 1](https://m.media-amazon.com/images/I/71Qbm+N-BnL.jpg) ![ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell - Image 2](https://m.media-amazon.com/images/I/51RWB30NlmL.jpg) ![ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell - Image 3](https://m.media-amazon.com/images/I/61ONI72d3vL.jpg) ![ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell - Image 4](https://m.media-amazon.com/images/I/61y9+NclZ2L.jpg) ![ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell - Image 5](https://m.media-amazon.com/images/I/71s04UHb1ZL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as intended, but no overcurrent protection *by S***D on August 30, 2023* Keep in mind these are to protect from over or under charging, but do not have overcurrent protection. I burned a couple out this way, that was my fault. ### ⭐⭐⭐⭐⭐ First-rate, Effective, Inexpensive *by J***I on October 12, 2025* Super little boards. Grab your nickel strip spot welder and get to work! ### ⭐⭐⭐⭐ Does the job well if a bit different than advertised *by A***N on October 15, 2023* I'm using these on single 18650 cell lower powered solar project and they're been working great. I do notice it seems to cut them off more at 4.1v but that's perfectly fine with me. As others have noted there is no discharge protection as you have to pull your power right off the same pads as the battery. My panels are a bit oversized for the power I draw anyway so this hasn't been a problem most of the time. One unit has an esp32 though and it pulled it down to 1v in no time. Lesson learned but these definitely still have a place as cheap charging protection. ## Frequently Bought Together - ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell - KOOBOOK 10pcs 3A BMS Protection Board with Solder Belt for 1S 3.7V 18650 Li-ion Lithium Battery Cell Kit - Fafeicy Solar Module,1A 4.4-6.5V Input 4.2V Output LiPo Li-ion Lithium Battery Charger MPPT Solar Controller Module(Without Pin), Module --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kr/products/407081892-aceirmc-12pcs-1s-3-7v-4a-18650-charger-pcb-bms](https://www.desertcart.kr/products/407081892-aceirmc-12pcs-1s-3-7v-4a-18650-charger-pcb-bms) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-07-29*