--- product_id: 47156062 title: "12V 100A 4Series BMS Protection Board with Balancing with Overcharge/Overdischarge/Overcurrent/Short Circuit Protection for LiFePO4 Battery Pack" brand: "walfront" price: "116.98 DT" currency: TND in_stock: true reviews_count: 13 category: "Walfront" url: https://www.desertcart.tn/products/47156062-12v-100a-4series-bms-protection-board-with-balancing-with-overcharge store_origin: TN region: Tunisia --- # 100A max current handling 12V, 4-series LiFePO4 compatibility Multi-layer protection suite 12V 100A 4Series BMS Protection Board with Balancing with Overcharge/Overdischarge/Overcurrent/Short Circuit Protection for LiFePO4 Battery Pack **Brand:** walfront **Price:** 116.98 DT **Availability:** ✅ In Stock ## Summary > 🛡️ Power up smart, stay protected smarter! ## Quick Answers - **What is this?** 12V 100A 4Series BMS Protection Board with Balancing with Overcharge/Overdischarge/Overcurrent/Short Circuit Protection for LiFePO4 Battery Pack by walfront - **How much does it cost?** 116.98 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/47156062-12v-100a-4series-bms-protection-board-with-balancing-with-overcharge) ## Best For - walfront enthusiasts ## Why This Product - Trusted walfront brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Powerhouse Protection:** Safeguards your LiFePO4 battery pack from overcharge, overdischarge, overcurrent, and short circuits—because your energy deserves elite defense. - • **Plug & Play Convenience:** Comes with a 5P-250mm wire for seamless installation—get your system up and running without the hassle. - • **Precision Cell Balancing:** Equilibrium function ensures each cell stays perfectly balanced, extending battery life and maximizing performance. - • **Compact & Waterproof Design:** Durable build that fits discreetly into your setup and withstands environmental challenges—engineered for the modern professional. - • **Reliable Continuous Operation:** Supports charging and discharging simultaneously, proven to handle steady 40A loads with ease for your daily power needs. ## Overview This 12V 100A 4-series BMS board is a must-have for LiFePO4 battery packs, delivering comprehensive multi-protection and cell balancing to enhance battery longevity and safety. Designed for easy installation and reliable continuous use, it’s the trusted core component that keeps your energy system efficient and secure. ## Description Product description The protection board has various protective functions for charging and discharging, such as overcharge protection, over-discharge protection, short circuit protection and over-current protect. Choosing a protection board and applying it appropriately is vital to the longevity your batteries. It is ideal for home DIY work and school science project, wide used in battery protection work. Balance Function Balance function the board equipped ensures that each battery cell can be fully charged at the same time. Specifications Continuous Discharging Current: 100A(MAX) Instantaneous Discharge Current: 150A Charging Voltage: 15V Charging Current: 10A(MAX) Inner Resistance: ≤25mΩ Working Current: ≤20uA Sleep Current (when Over-discharge): ≤10uA Working Temperature Range: -30/+80℃ For 4 Series 12V LiFePO4 Batteries This product is a battery protection BMS board which is designed for 4 series 12V LiFePO4 batteries. Comes with 5P-250mm wire for convenient use. Package Includes 1×4S Battery Protection Board (not included LiFePO4 batteries) Multi-Protection Overcharge Protect Over-charge Detect: 3.75±0.05V, Protect Delay: 0.5S, Over-charge release: 3.65±0.1V, Detect Voltage: 3.60±0.05V, Release Voltage: 3.60±0.05V, Balance Current: 36±5mA Over-current Protect Detect Voltage:150mV, Detect Delay: 9mS, Current Detect: 200±10A, Release Condition: Cut Load Over-discharge Protect Over-discharge Detect: 2.0±0.1V, Over-discharge Detect delay: 0.1S, Release Voltage:2.25±0.1V Short-circuit Protect Protect Condition:Load Short Circuit, Detect Delay: 250uS, Release Condition: Cut Load Safety Can be used to avoid explosion, fire and damage of your battery pack, safe for use. It will protect battery pack from overcharging, over-discharging over-current and short circuit. Q: How can i wire this so that it’s a charging and discharging bms without having separate charging and discharging ports? A: Connect your charger directly over the battery terminals but make sure you use a charger designed for LiFePO4 batteries (LFP charge profile) . Then run your load through the BMS. Q: is there a diagram for wiring 4s2p? or does it follow standard wiring? A:Standard. Just wire the battery cells themselves in 4s2p. Q: how can this board supports 4 12volt batteries when you say 15 volts is max charge voltage, to charge 4x12v bat in series is 54volts A: This is a 4S BMS. Each LiFePO4 cell is 3.6v max which would give you 4 cells at 14.4v at full charge. !!! DO NOT USE 12v LED ACID BATTERIES WITH THIS BMS !!! Q: Can I tie the (output - ) and the ( charge - ) together and use this as drop in replacement for a lbacid cell? Can i then put 2bps in series for 24V? A: NO, it will damage the board Q: What gauge is 5P-250mm wire? I've searched everywhere and can't find it. A:5P is in reference to the total number of wires on this ribbon, 250mm is approximately 26 AWG gauge which can carry approximately 2.5 amps for short runs Q: I have 1 lifepo4 battery has 12 volts and 100 amps total has 8 terminals 4 cells is this bms compatible with my battery or do i need a different bms? A:Yes it will work since it changes 4 cells max which is what you have. note that it charges at 10Amps Q: Will this work with lithium polymer batteries and does it limit the voltage to 12v? (4.2x4=16.4) Answer:Yes, it is used for 4 series 12V LiFePO4 batteries, charging voltage is 15V. ## Features - Convenient to Operate: This Lithium BMS is designed for 4 series 12V LiFePO4 batteries, comes with 5P-250mm wire for convenient use - Essential Part for Circuit Board: Protection circuit board is the heart of battery pack, must to have to avoid battery pack from explosion, fire and damage - Multiple Protction Functions Allows Glossy Better Expeience: This Waterproof BMS Multiple protective functions including overcharge protection, overdischarge protection, overcurrent protection and short circuit protection - Balance Function: This lifepo4 bms lithium Balance Board is equipped with equilibrium function to keep each cell in balance and good service life ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07511RJ9S | | Battery Cell Composition | Lithium Ion | | Battery Type | Lithium Ion | | Best Sellers Rank | #270,046 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,127 in Power Converters | | Brand | Walfront | | Brand Name | Walfront | | Compatible with Vehicle Type | For LiFePO4 Battery Pack | | Customer Reviews | 3.7 out of 5 stars 154 Reviews | | Item Weight | 0.05 Kilograms | | Manufacturer | Walfront | | Manufacturer Part Number | Walfrontvth9zscx12 | | Model Number | 4330198367 | | UPC | 736691475918 | | Vehicle Service Type | For LiFePO4 Battery Pack | | Voltage | 12 Volts, 3.2 Volts | ## Product Details - **Battery Cell Composition:** Lithium Ion - **Brand:** Walfront - **Item Weight:** 0.05 Kilograms - **Manufacturer:** Walfront - **UPC:** 736691475918 - **Vehicle Service Type:** For LiFePO4 Battery Pack - **Voltage:** 12 Volts, 3.2 Volts ## Images ![12V 100A 4Series BMS Protection Board with Balancing with Overcharge/Overdischarge/Overcurrent/Short Circuit Protection for LiFePO4 Battery Pack - Image 1](https://m.media-amazon.com/images/I/61V6RMIiWwL.jpg) ## Questions & Answers **Q: Can this handle charging through the negative output instead of the charging negative pad?** A: You can't really do this, because you lose the charging protection. Essentially you will be able to charge at whatever the full output is... since you're using the same mosfets. I've tested this personally on this unit, and similarly-priced models from other vendors. It's a shame, because I'm trying to use this with an alternator and I am starting to think BMS is not possible. I will have to get a charge management controller. **Q: It specifies charge voltage of 15v. can i use an 18v dc? will it regulate it for proper charging voltage and current? thanks.** A: Hello~ You cannot use an 18 v dc, it's higher than 15 v, and may cause damage to the protection. It means that the max charging voltage is 15 v. Hope this could help you, and thank you for your support! **Q: how to wire up the separate port BMS to solar charge controller? Is there diagram?** A: solar positive and battery positive go together on the battery and solar ground goes to battery charge ground on the bms **Q: Hello, each of my four 12v 12ah lifepo4 batteries already have individual internal bms protection. would adding this unit make any sense? thx** A: It depends on you, and this protection circuit board helps protecting battery pack from overcharging, over-discharging over-current and short circuit. and it is designed with equilibrium function to keep each cell in balance and good service life. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***R on May 28, 2018* ### ⭐⭐⭐⭐ Review *by M***E on December 28, 2024* ### ⭐⭐⭐ Review *by E***S on April 7, 2024* ## Frequently Bought Together - 12V 100A 4Series BMS Protection Board with Balancing with Overcharge/Overdischarge/Overcurrent/Short Circuit Protection for LiFePO4 Battery Pack - DEWIN Pure Nickel Strip 99.6% Nickel, 1M 0.15 mm Soldering Tabs for High Capacity 18650 Lithium Battery Pack, Li-Po, NiMh and NiCd Battery Pack and Spot Welding --- ## 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/47156062-12v-100a-4series-bms-protection-board-with-balancing-with-overcharge](https://www.desertcart.tn/products/47156062-12v-100a-4series-bms-protection-board-with-balancing-with-overcharge) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-24*