--- product_id: 459368354 title: "6PCS 2S 7.4V 8.4V 8A 18650 Battery Protection Board PCB BMS Protection Module for Li-ion Lithium Battery Cell" brand: "daier" price: "AR$34090" currency: ARS in_stock: true reviews_count: 5 url: https://www.desertcart.com.ar/products/459368354-6pcs-2s-7-4v-8-4v-8a-18650-battery-protection store_origin: AR region: Argentina --- # 8A max continuous current 2S 7.4V / 8.4V battery support 4-layer multi-protection system 6PCS 2S 7.4V 8.4V 8A 18650 Battery Protection Board PCB BMS Protection Module for Li-ion Lithium Battery Cell **Brand:** daier **Price:** AR$34090 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Power your projects with precision and protection β€” don’t get left in the dark! ## Quick Answers - **What is this?** 6PCS 2S 7.4V 8.4V 8A 18650 Battery Protection Board PCB BMS Protection Module for Li-ion Lithium Battery Cell by daier - **How much does it cost?** AR$34090 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/459368354-6pcs-2s-7-4v-8-4v-8a-18650-battery-protection) ## Best For - daier enthusiasts ## Why This Product - Trusted daier brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Wiring Made Simple:** Clear, diagram-based wiring instructions ensure hassle-free installation and prevent damage. - β€’ **Compact & Efficient:** Slim 41mm x 8mm x 2.2mm PCB fits seamlessly into your battery packs without bulk. - β€’ **Safety First, Always:** Integrated overcharge, over-discharge, overcurrent, and short circuit protection for ultimate device security. - β€’ **Universal Compatibility:** Designed for 2S 7.4V/8.4V Li-ion batteries, perfect for massagers, solar lights, and more. - β€’ **Power Up with Confidence:** Handles up to 8A continuous and 16A instantaneous current for robust performance. ## Overview This 6-pack of 2S 7.4V/8.4V 8A Battery Protection Boards offers advanced multi-layer safety features including overcharge, over-discharge, overcurrent, and short circuit protection. Compact and compatible with various 3.7V lithium battery configurations, it supports up to 16A instantaneous current, making it ideal for DIY battery packs in massagers, solar street lights, and backup power supplies. Strict wiring adherence ensures optimal performance and longevity. ## Description Specifications: Charging Voltage: 8.4V Overcharge Voltage Range: 4.28V plus or minus 0.05V Overpressure Voltage Range: 2.3V-2.9V plus or minus 0.05V Upper Limit Operating Current: 8A Upper Limit Instantaneous Current: 16A Quiescent Current: less than 30uA Size: 41mm x 8mm x 2.2mm/ 1.61β€³ Γ—0.31β€³Γ—0.09β€³(L x W x H) Overcharge protection, over discharge protection, short circuit protection, overcurrent protection. Welding Point Description: B + battery anode; B - connect battery negative terminal; MMB connect battery 1 to battery 2; P + charging/discharge correct poles (charging end/discharge end sharing); P - charging/discharge terminal negative terminal (charging end/discharge end sharing). Wiring: B+ : Connect to battery positive. B- : Connect to battery negative. MB: Connection point between battery 1 and battery 2. P+: Positive pole for charging/discharging (common at charging/discharging end). P- : Negative pole for charging/discharging end (common at charging/discharging end). 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. Tips: the product must be connected to a 8.4V charging voltage through p+ and p- before it will create voltage on pads.Or you can activate this BMS by momentarily shorting b- and p-. ## Features - Overcharging Range: 4.25 Β± 0.05V to 4.35V; Over Voltage Range: 2.3 Β± 0.05V to 3.0V; Maximum working current: 8A; Maximum instantaneous current: 16A. - Useful: 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. - 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 for your devices. - 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. - Package Includes:10PCS 2S 7.4V 8.4V 8A Lithium Battery Protection Board. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B09WN3GGM8 | | Best Sellers Rank | #941,152 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #4,315 in Power Converters | | Brand | daier | | Color | blue | | Customer Reviews | 4.4 4.4 out of 5 stars (12) 4.4 out of 5 stars | | Input Voltage | 8.4 volts | | Item Weight | 0.01 kg | | Manufacturer | daier | | Mfr Part Number | E1269 | | Model Number | E1269 | | Number Of Items | 6 | | Number Of Packs | 10 | | Output Voltage | 8.4 volts_of_direct_current | | Plug Type | Micro USB | | Power Source | rechargeable battery | | Unit Count | 6 | | Warranty Description | Strictly according to the diagram wiring;Do not mix the good battery and poor battery to use. | ## Product Details - **Brand:** daier - **Color:** blue - **Input Voltage:** 8.4 Volts - **Item Weight:** 0.01 Kilograms - **Output Voltage:** 8.4 Volts (DC) ## Images ![6PCS 2S 7.4V 8.4V 8A 18650 Battery Protection Board PCB BMS Protection Module for Li-ion Lithium Battery Cell - Image 1](https://m.media-amazon.com/images/I/81a063MN4BL.jpg) ![6PCS 2S 7.4V 8.4V 8A 18650 Battery Protection Board PCB BMS Protection Module for Li-ion Lithium Battery Cell - Image 2](https://m.media-amazon.com/images/I/511KI5tlEFL.jpg) ![6PCS 2S 7.4V 8.4V 8A 18650 Battery Protection Board PCB BMS Protection Module for Li-ion Lithium Battery Cell - Image 3](https://m.media-amazon.com/images/I/71Jo1Hwce5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good *by on Reviewed in the United States July 16, 2025* Good product for the price, excellent seller, fast shipping and delivery, 100% recommended seller and product ### ⭐⭐⭐⭐⭐ Very small and good value *by on Reviewed in the United States January 7, 2024* I built a few 7.8V 2S1P packs from salvaged chromebook batteries. Seem to work fine for the low power usage. Very small and easyto package. ### ⭐⭐⭐⭐⭐ Seems to work *by on Reviewed in the United States August 2, 2023* Nothing has burned down or shorted, so I am guessing they work. ## Frequently Bought Together - daier 6PCS 2S 7.4V 8.4V 8A 18650 Battery Protection Board PCB BMS Protection Module for Li-ion Lithium Battery Cell - Comidox 3S 12V 10A 18650 Lithium Battery Protection Board BMS Li-ion Charger Protection Module Anti-Overcharge/Over-Discharge/Over-Current/Short Circuit 3Pcs - Dorhea MT3608 DC-DC Step Up Boost Power Converter 2A Module Adjustable Step Up Voltage Regulator Board Voltage 2-24V to 5V-28V Output Voltage Mico USB Compatible with Ardu ino (Pack of 10) --- ## 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.com.ar/products/459368354-6pcs-2s-7-4v-8-4v-8a-18650-battery-protection](https://www.desertcart.com.ar/products/459368354-6pcs-2s-7-4v-8-4v-8a-18650-battery-protection) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-08-24*