--- product_id: 241205835 title: "2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell (8pcs)" brand: "aceirmc" price: "71.57 DT" currency: TND in_stock: true reviews_count: 8 category: "Aceirmc" url: https://www.desertcart.tn/products/241205835-2s-7-4v-8-4v-8a-18650-charger-pcb-bms store_origin: TN region: Tunisia --- # 50,000+ hours lifespan 8A high current rating Supports 2S 7.4V/8.4V Li-ion packs 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell (8pcs) **Brand:** aceirmc **Price:** 71.57 DT **Availability:** ✅ In Stock ## Summary > 🔋 Charge smarter, last longer — power your projects with confidence! ## Quick Answers - **What is this?** 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell (8pcs) by aceirmc - **How much does it cost?** 71.57 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/241205835-2s-7-4v-8-4v-8a-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 - • **Endurance You Can Trust:** Engineered for over 50,000 hours of reliable operation—built to outlast your projects. - • **Versatile Compatibility:** Perfect for 3.7V lithium cells in massagers, solar street lights, UPS systems, and more—future-proof your power solutions. - • **Compact Precision Engineering:** Ultra-small 0.31" PCB with high-accuracy voltage detection fits seamlessly into any custom battery pack. - • **Powerhouse 8A Current Control:** Delivers robust 8-amp charging and discharging for high-performance battery management. - • **Comprehensive 4-in-1 Safety Shield:** Integrated overcharge, over-discharge, overcurrent, and short circuit protections keep your devices safe and sound. ## Overview The ACEIRMC 2S 7.4V/8.4V 8A BMS Protection Board is a compact, high-accuracy battery management system designed for 2-series Li-ion 18650 cells. It features an 8-amp current rating, over 50,000 hours of durability, and four critical safety protections (overcharge, over-discharge, overcurrent, short circuit). Ideal for DIY battery packs powering everything from solar street lights to Raspberry Pi UPS setups, this PCB ensures efficient, safe, and long-lasting battery performance. ## Description Buy ACEIRMC 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell (8pcs): Battery Chargers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: tiny and very very good - 12/27/24: I tried non-constant-current supplies but the 8A capability of these bms’ is too much for the 3000mah Samsung 30Q batteries I’m using (which spec 1.5a nominal charge and 4a quick charge. Two in series is double the volts @ same amps so I have to limit the charge current to 4a or less and I’m choosing to set it at 3a so it can drive the pi’s and router when 12v is available.) There is no interruption in supply power when the 12v input is cut off, only a slight change in the voltage from the charger’s 9v down to the batteries 8.4v. orig: These are very small, a little over 1” long. The solder pads are very nice and quite easy to get at with a solder tip plus they take solder very nicely. The two I set up so far worked perfectly. I put them on the back side of 2x battery holders and the solder pads were perfectly positioned to take the wires from the holders tabs in straight runs. Even charging at 8a these only get slightly warm, I didn’t run them longer than maybe 10 min but if they were going to get HOT they would have by then. I’m impressed. I’m using these to make a UPS for two pi02 raspberry pi’s and a Slate router. I feed it from a constant current Drok 5a variable DC-DC converter and this works perfectly. The bms’ sense the battery voltage and apply a charge if needed automatically shutting off once the voltage rises. I am experimenting with what regulator to use to feed the battery voltage to the USB sockets for the rpi’s and the router - a cheap 3a unit may run hot at the ~2a I expect will be needed. Another Drok 5a converter would work but might be overkill. I could not be happier with these. Review: works well - works very well and has survived in an outside solar panel enclosure ## Features - HIGH-ACCURACY, HIGHLY DURABLE: High-accuracy voltage detection circuit, fine workmanship and durable, Effective life greater than 50000 hours. - 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. - Over-discharge protection, overcurrent protection, overcharge protection, short circuit protection; A combination of 4 safety features that work together to provide ultimate protection for your devices. - MOS transistor can control the battery charge and discharge, low standby current consumption. - ATTENTION: Strictly according to the diagram wiring: B+: Battery V+ Positive, B-: Battery V- Negative, P+: Output / Charging V+, P-: Output / Charging V-, MB: The connection point between the batteries.Otherwise it will cause damage to the chip. Do not mix the good battery and poor battery to use. The internal resistance of 3 battery capacity are closer will be better. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08HLQQCQJ | | Amperage | 8 Amps | | Battery Charge Time | 50000 Hours | | Best Sellers Rank | #205,221 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #826 in Power Converters | | Brand | ACEIRMC | | Color | 8PCS | | Connector Type Used on Cable | Battery Connector | | Current Rating | 8 Amps | | Customer Reviews | 4.4 out of 5 stars 66 Reviews | | Input Voltage | 8.4 Volts | | Item Dimensions D x W x H | 0.09"D x 0.31"W x 0.31"H | | Item Weight | 0.01 Kilograms | | Manufacturer | ACEIRMC | | Number of Ports | 2 | | Output Voltage | 8.4 Volts | | Product Dimensions | 0.09"D x 0.31"W x 0.31"H | | UPC | 701715445611 | ## Product Details - **Brand:** ACEIRMC - **Color:** 8PCS - **Output Voltage:** 8.4 Volts - **Input Voltage:** 8.4 Volts - **Charging Time:** 50000 Hours ## Images ![2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell (8pcs) - Image 1](https://m.media-amazon.com/images/I/712nBYZ1qtL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ tiny and very very good *by P***R on December 23, 2024* 12/27/24: I tried non-constant-current supplies but the 8A capability of these bms’ is too much for the 3000mah Samsung 30Q batteries I’m using (which spec 1.5a nominal charge and 4a quick charge. Two in series is double the volts @ same amps so I have to limit the charge current to 4a or less and I’m choosing to set it at 3a so it can drive the pi’s and router when 12v is available.) There is no interruption in supply power when the 12v input is cut off, only a slight change in the voltage from the charger’s 9v down to the batteries 8.4v. orig: These are very small, a little over 1” long. The solder pads are very nice and quite easy to get at with a solder tip plus they take solder very nicely. The two I set up so far worked perfectly. I put them on the back side of 2x battery holders and the solder pads were perfectly positioned to take the wires from the holders tabs in straight runs. Even charging at 8a these only get slightly warm, I didn’t run them longer than maybe 10 min but if they were going to get HOT they would have by then. I’m impressed. I’m using these to make a UPS for two pi02 raspberry pi’s and a Slate router. I feed it from a constant current Drok 5a variable DC-DC converter and this works perfectly. The bms’ sense the battery voltage and apply a charge if needed automatically shutting off once the voltage rises. I am experimenting with what regulator to use to feed the battery voltage to the USB sockets for the rpi’s and the router - a cheap 3a unit may run hot at the ~2a I expect will be needed. Another Drok 5a converter would work but might be overkill. I could not be happier with these. ### ⭐⭐⭐⭐⭐ works well *by J***Y on December 17, 2025* works very well and has survived in an outside solar panel enclosure ### ⭐⭐⭐⭐⭐ Working perfectly. *by M***R on June 5, 2025* So far these are great little protection boards. No problems at all. Easy to solder to. ## Frequently Bought Together - ACEIRMC 2S 7.4V 8.4V 8A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell (8pcs) - 15pcs 5V 1A TP4056 Charging Module Type-C USB 18650 Lithium Battery Charger Board with Protection (Type-C USB) - ACEIRMC 12pcs 1S 3.7V 4A 18650 Charger PCB BMS Protection Board for Li-ion Lithium Battery Cell --- ## 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/241205835-2s-7-4v-8-4v-8a-18650-charger-pcb-bms](https://www.desertcart.tn/products/241205835-2s-7-4v-8-4v-8a-18650-charger-pcb-bms) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-31*