--- product_id: 92152674 title: "2Pcs 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board" brand: "daier" price: "558027ā‚«" currency: VND in_stock: true reviews_count: 8 category: "Daier" url: https://www.desertcart.vn/products/92152674-2pcs-3s-11-1v-12-6v-25a-w-balance-18650 store_origin: VN region: Vietnam --- # Max 25A continuous current 3S 11.1V Li-ion battery balance Over-voltage & short circuit protection 2Pcs 3S 11.1V 12.6V 25A W/Balance 18650 Li ion Lithium Battery PCB Protection Board **Brand:** daier **Price:** 558027ā‚« **Availability:** āœ… In Stock ## Summary > šŸ› ļø Balance your power, boost your build ā€” never settle for less! ## 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?** 558027ā‚« with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/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€¢ **Safety First Design:** Built-in short circuit and over-discharge protection for worry-free use. - ā€¢ **Compact & Lightweight:** Slim 56x45x1.2mm PCB weighing just 12g fits seamlessly into DIY projects. - ā€¢ **Power-Packed Performance:** Handles up to 25A continuous current for robust battery management. - ā€¢ **Precision Voltage Control:** Maintains safe voltage range with 4.25-4.35V overcharge cutoff. - ā€¢ **Ultimate Battery Longevity:** Balances 3-series 18650 cells to extend battery life and efficiency. ## Overview This 2-piece 3S 11.1V lithium-ion battery protection board expertly balances and safeguards 18650 cells with up to 25A continuous current capacity. Featuring precise over-voltage and over-discharge cutoffs, short circuit protection, and ultra-low quiescent current, it ensures optimal battery performance and longevity in compact form factor. Ideal for DIY battery packs and professional-grade power solutions. ## 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 Review: Great BMU! It works a long time in my battery pack I've made. - Inexpensive BMU (battery management unit) that works and manages batteries to charge and discharge when in use. I've purchased other BMU's for different voltages, using 18650 batteries that I've recycled from old laptop batteries. Review: DIY 12V Li-ion Battery built of 3S4P configuration - This PCB is installed with 18650 cells in a 3S4P configuration for a 12V portable system. This model was placed in a dead HECO 58V lithium battery and fits perfectly. Charged battery recorded 12.3V dc and discharged to read 10.1V dc. I would Continue to monitor for performance on the build-up and report any update. Beside, seems to work within anticipated parameters. It's important to note that, this board is not a BMS - but a balancer, and therefore selecting the charging source should not be far greater that 13V to get the battery possibly fully charge. At best use a 12V dc charger, will possibly provide a decent control and prevent over charging. If a charging source is solar, bear in mind that Li -ion charging settings are strongly required if buck converter is being used. If a charging source is via BMS, Li-ion setting is a must-have! Don't just fault the balancer, when preliminary settings on the user are not appropriate. ## 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 | #229,453 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #927 in Power Converters | | Brand | daier | | Color | green black | | Customer Reviews | 4.3 out of 5 stars 713 Reviews | | Input Voltage | 3.7 Volts | | Item Weight | 12 Grams | | Manufacturer | daier | | Mfr Part Number | Z370*2 | | Model Number | Z370*2 | | Output Voltage | 4.35 Volts (DC) | | Plug Format | 2 Pin | | Plug Type | 2 Pin | ## Product Details - **Brand:** daier - **Color:** green black - **Input Voltage:** 3.7 Volts - **Item Weight:** 12 Grams - **Output Voltage:** 4.35 Volts (DC) ## 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) ## 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. ## Customer Reviews ### ā­ā­ā­ā­ā­ Great BMU! It works a long time in my battery pack I've made. *by K***R on May 2, 2024* Inexpensive BMU (battery management unit) that works and manages batteries to charge and discharge when in use. I've purchased other BMU's for different voltages, using 18650 batteries that I've recycled from old laptop batteries. ### ā­ā­ā­ā­ā­ DIY 12V Li-ion Battery built of 3S4P configuration *by C***. on October 27, 2021* This PCB is installed with 18650 cells in a 3S4P configuration for a 12V portable system. This model was placed in a dead HECO 58V lithium battery and fits perfectly. Charged battery recorded 12.3V dc and discharged to read 10.1V dc. I would Continue to monitor for performance on the build-up and report any update. Beside, seems to work within anticipated parameters. It's important to note that, this board is not a BMS - but a balancer, and therefore selecting the charging source should not be far greater that 13V to get the battery possibly fully charge. At best use a 12V dc charger, will possibly provide a decent control and prevent over charging. If a charging source is solar, bear in mind that Li -ion charging settings are strongly required if buck converter is being used. If a charging source is via BMS, Li-ion setting is a must-have! Don't just fault the balancer, when preliminary settings on the user are not appropriate. ### ā­ā­ā­ā­ā­ Good Quality 18650 Li ion Lithium Battery protection board! *by B***S on September 16, 2019* This is a 3S 12V 18650 Li-ion Lithium Battery 25A Battery management system board (BMS) which is a *must* to have if you are building your own Li-Ion battery packs. This one is needed for "over-voltage protection" of your 3S battery pack. The over voltage protection ranges between 4.25~4.35V Ā± 0.05V, Also, this BMS prevents over discharge of your battery pack when the individual cell group voltage ranges between: 2.3~3.0V Ā± 0.05V. So what does actually BMS portion of this board actually do?, Well the so called "balancing" is handled by the BMS circuitry of this board, remember your 12v battery charger sends out constant voltage & current especially if you have dumb charger. So, when the first cell group reaches full capacity, the BMS cuts off the charger and drains the highest cell group(s) slowly using its on-board resistors. Once its lower, it allows the charger to turn back on. It repeats until all cell groups are full and are at the same levels as the other groups in the (|3S|) configuration it supports. It does offer short circuit protection (The main reason why you must have this) I did try it and it worked but just because short circuit protection is there do not try to deliberately short circuit too often as it does provide up-to 25A and it does self recover after a temporary short circuit and protects the battery from overheating and catching fire when there is deliberate permanent short circuit at the output terminals. This alone is worth having this board. FYI, Just like any other DIY battery pack do's and don'ts you must adhere to rules and make sure that when the batteries are connected in series with 3 groups (|3S|) please ensure that the voltage of each battery is the same. If not the same swap out the batteries and ensure all the batteries are of same voltage in the group this will ensure better balancing operation. The life of a this DIY rechargeable battery pack using this 18650 Li ion Lithium Battery PCB Protection Board can be further extended through the use of an intelligent charging system at the battery terminals but that generally costs a lot of money. Rating the product with five stars! ## 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.vn/products/92152674-2pcs-3s-11-1v-12-6v-25a-w-balance-18650](https://www.desertcart.vn/products/92152674-2pcs-3s-11-1v-12-6v-25a-w-balance-18650) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-18*