--- product_id: 92152674 title: "2Pcs 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board" brand: "daier" price: "R387" currency: ZAR in_stock: true category: "Daier" url: https://www.desertcart.co.za/products/92152674-2pcs-3s-11-1v-12-6v-25a-w-balance-18650 store_origin: ZA region: South Africa --- # Max 25A continuous current 3S 11.1V Li-ion battery support Built-in PCB protection & balance 2Pcs 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board **Brand:** daier **Price:** R387 **Availability:** āœ… In Stock ## Summary > šŸ› ļø Power your projects with smart, safe, and balanced energy! ## Quick Answers - **What is this?** 2Pcs 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board by daier - **How much does it cost?** R387 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/92152674-2pcs-3s-11-1v-12-6v-25a-w-balance-18650) ## 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 - ā€¢ **Balance Like a Pro:** Integrated balance function ensures even charging across 3 cells - ā€¢ **Plug & Play Peace of Mind:** Short circuit protection with delayed self-recovery for hassle-free use - ā€¢ **Precision Voltage Control:** Over-voltage cutoff at 4.3V Ā±0.05V keeps your batteries safe - ā€¢ **Durability Meets Efficiency:** Ultra-low quiescent current (<30ĀµA) extends battery life - ā€¢ **Power Through with Confidence:** Handles up to 25A continuous current for demanding projects ## Overview This 2-pack of 3S 11.1V lithium-ion battery protection boards offers robust 25A continuous and up to 40A transient current handling, precise over-voltage and over-discharge safeguards, and integrated cell balancing. Designed with ultra-low quiescent current and short circuit protection, these compact PCB modules ensure optimal battery performance and longevity for professional-grade power management. ## Description Product Description Features: 100% Brand New and High Quality Strictly according to the diagram wiring: 0V(B )3.7V(B1)7.4V(B2)11.1V(B+), Do not deliberately short circuit. After the line is connected, Need to charge first, then have output. When the battery is connected in series with 3 groups, Please ensure that the voltage of each battery is the same. If not same, please fill in each set of batteries and then use. Do not mix the good battery and the battery. The capacity of the battery internal resistance is closer will be better. Attention: Do not mix the good battery and poor battery to use. The internal resistance of 3 battery capacity are closer will be better. Please buyers know the professional knowledge of this module before buying. Specification: Over voltage range: 4.25 4.35vĀ”ƀ0.05v Over discharge voltage range: 2.3 3.0vĀ”ƀ0.05v Maximum operating current: 0 25A Maximum transient current: 34 40A Quiescent current: less than 30uA Internal resistance: less than 100m? Working temperature: 40 +50? Storage condition: 40 +80? Effective life: more than30000h Short circuit protection: Yes, delayed self recovery Size: 56mm*45mm*1.2mm(LXWXH) Material: PCB Color: Green Quantity: 1 PC Net Weight: 12g Note: Lighting, display and other factors may cause COLOR SHADING, please comprehensive pictures and text descriptions to determine! Package Includes: 2 x Battery Protection Board ## Features - Over voltage range: 4.25-4.35v Ā± 0.05v; Over discharge voltage range: 2.3-3.0v Ā± 0.05v - Maximum operating current: 0-25A ;Maximum transient current: 34-40A - Wiring:(please check the picutre 3 wiring diagram)Strictly according to the diagram wiring: 0V(B )3.7V(B1)7.4V(B2)11.1V(B+), Do not deliberately short circuit. After the line is connected, Need to charge first, then have output. - When the battery is connected in series with 3 groups, Please ensure that the voltage of each battery is the same. If not same, please fill in each set of batteries and then use. Do not mix the good battery and the battery. - Attention: 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 | B07JMY631D | | Best Sellers Rank | #334,967 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,439 in Power Converters | | Brand | daier | | Color | green black | | Customer Reviews | 4.4 4.4 out of 5 stars (716) | | Input Voltage | 3.7 volts | | Item Weight | 12 g | | Manufacturer | daier | | Mfr Part Number | Z370*2 | | Model Number | Z370*2 | | Number of Items | 2 | | Number of Packs | 2 | | Output Voltage | 4.35 volts_of_direct_current | | Plug Type | 2 Pin | | Power Source | battery | | Unit Count | 2 Count | ## Product Details - **Brand:** daier - **Color:** green black - **Input Voltage:** 3.7 volts - **Item Weight:** 12 g - **Output Voltage:** 4.35 volts_of_direct_current ## Images ![2Pcs 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board - Image 1](https://m.media-amazon.com/images/I/71o3GVWmqlL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: If a single cell drops below 2.3V will the entire battery pack be disconnected? It appears that all three cells need to drop below 2.3V.** A: Calling this tiny board "BMS" is overkill, This is more of a simple "Battery Protection board" with little bit of so called "BMS" thingy. This BMS won't cut on discharge until at least one "cell-group" has dropped to a dangerously low voltage.. Since you see the arrangement is 3S and with 5 x 18650 in parallel, one of such cell-group developing an internal fault and dropping to a dangerous low level of 2.3 while the rest of the cells in the 3S configuration having more than 4.0 is very rare and if that ever happens, it better that the BMS disconnects that cell-group to save the other two groups. To answer your question: - Yes! if single cell drops below 2.3v it does have a potential for the entire battery pack to be disconnected from the output terminal by design. **Q: One you build the battery, i assume you need a 12v dc charger. anyone have any reccomendations for chargers?** A: find something at 12.6v - there is a company called talentcell on amazon that sells some already put together batteries using 3s 18650 cells at various parallel configs to give different capacity. They do sell their 12.6v chargers separately - but keep in mind they are designed for 3s2p or 3s3p levels of setup - i think 1 or 2 amp - so depending on how big your build is - these may not work for you. I have in the past gone with 12.6 volts and used 1 amp for every parallel set of cells. so for a 3s5p battery i had a 12.6v 5a charger - lots of those on here too. **Q: When using a 12v power supply to charge the battery, will the BMS automatically shut off, or can it be overcharged?** A: For this item the max voltage that should be put into it for standard max voltage 4.2v 18650 batteries is 12.6v (4.2v x 3s). Any more than that and you risk overcharging (damaging) your batteries. For the longest life for the batteries over time 12v should be most optimal (ends up being about 8-10% under max capacity of most batteries). **Q: What thermocouple is needed for these boards?** A: There is no capability for temp monitoring on this board that I have seen. ## Frequently Bought Together - 2Pcs 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board - SHONAN Pure Nickel Strip 99.6% Nickel, 2 Inches Nickel Strips, 0.15x6x50mm Soldering Tabs for High Capacity 18650 Lithium Battery Pack, Li-Po, NiMh and NiCd Battery Pack and Spot Welding, 50 Pcs - 200mm(7.9in) Width PVC Heat Shrink Wrap Tube 18650 21700 26650 Lithium Battery DIY Battery Pack 3M(9.9ft) Length Blue --- ## Why Shop on Desertcart? - šŸ›’ **Trusted by 1.3+ Million Shoppers** ā€” Serving international shoppers since 2016 - šŸŒ **Shop Globally** ā€” Access 737+ million products across 21 categories - šŸ’° **No Hidden Fees** ā€” All customs, duties, and taxes included in the price - šŸ”„ **15-Day Free Returns** ā€” Hassle-free returns (30 days for PRO members) - šŸ”’ **Secure Payments** ā€” Trusted payment options with buyer protection - ā­ **TrustPilot Rated 4.5/5** ā€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/92152674-2pcs-3s-11-1v-12-6v-25a-w-balance-18650](https://www.desertcart.co.za/products/92152674-2pcs-3s-11-1v-12-6v-25a-w-balance-18650) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-29*