--- product_id: 527088701 title: "3S 4S 5A Active Equalizer Whole Group Balancer Lifepo4 Lipo Lto Lithium Active Battery Energy Transfer Equalization Capacitor + Test Board" brand: "cywhrvzsf" price: "£19.35" currency: GBP in_stock: true reviews_count: 8 category: "Cywhrvzsf" url: https://www.desertcart.co.uk/products/527088701-3s-4s-5a-active-equalizer-whole-group-balancer-lifepo4-lipo store_origin: GB region: United Kingdom --- # 0-5.5A equalizing current 60-300AH battery capacity range Sleep protection <3V 3S 4S 5A Active Equalizer Whole Group Balancer Lifepo4 Lipo Lto Lithium Active Battery Energy Transfer Equalization Capacitor + Test Board **Brand:** cywhrvzsf **Price:** £19.35 **Availability:** ✅ In Stock ## Summary > ⚡ Balance Smarter, Charge Stronger — Never Settle for Less! ## Quick Answers - **What is this?** 3S 4S 5A Active Equalizer Whole Group Balancer Lifepo4 Lipo Lto Lithium Active Battery Energy Transfer Equalization Capacitor + Test Board by cywhrvzsf - **How much does it cost?** £19.35 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/527088701-3s-4s-5a-active-equalizer-whole-group-balancer-lifepo4-lipo) ## Best For - cywhrvzsf enthusiasts ## Why This Product - Trusted cywhrvzsf brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Build Quality:** Features original ultra-low resistance MOSFETs and 2OZ copper PCB for superior durability and heat dissipation. - • **Smart Sleep Protection:** Automatically enters low-power sleep mode below 3V to safeguard battery health and extend lifespan. - • **Plug & Play with Test Board:** Includes a test board for easy setup and real-time balancing status via LED indicator—no external power needed. - • **Wide Compatibility Spectrum:** Supports 3S-4S Lithium Iron Phosphate, NCM Ternary Polymer batteries (1.8V-4.5V) with 60-300AH capacity. - • **Ultra-Efficient Active Balancing:** Balances lithium battery packs up to 5.5A for peak performance and longevity. ## Overview The 3S 4S 5A Active Equalizer is a cutting-edge capacitor-based battery balancer designed for 3 to 4 series lithium battery packs (LiFePO4, NCM Polymer) with capacities from 60 to 300AH. It actively transfers energy between cells without external power, ensuring uniform voltage and maximizing battery lifespan. Equipped with ultra-low resistance MOSFETs, a thick copper PCB, and intelligent sleep protection, it safeguards batteries from damage while delivering up to 5.5A balancing current. The included test board and LED indicators simplify installation and monitoring, making it an essential upgrade for professionals demanding reliable, high-performance battery management. ## Description Product Describtion: Model:3S-4S Suitable : Lithium Iron Phosphate, NCM Ternary Polymer,(Not Fit Lithium Titanate)Voltage is 1.8 V-4.5V Quiescent Current: 12mA Suggest Battery Capacity: 60-300AH Working Temperature :-20 degrees to +60 degrees Sleep Protection:voltage<3V, enter the sleep,standby power consumption is less than 0.1mA,to reduce the damage to the battery. Safety Information：Before connecting the equalization board, check whether each piece of wiring is correct, and do insulation work to prevent burnout,This is very important, please pay attention. NOTE: If the LED indicator is always on, it means that the capacitor plate has been running in a balanced manner. When a fault occurs, the LED indicator will go out. Package Included:1*3S 4S 5A Active Equalizer Lifepo4 Lipo Lto Lithium1*Test Board Review: Balances fast and good value - Bought some 200AH LIFEPO4 drop in batteries (non-smart) and had issues reaching above 13.8v during charge, with more than half of them... I had some suspicions one cell or more were reaching 3.65v before the rest. They still pulled capacity so support wasn't much help. After cracking one open, I confirmed the imbalance. This balancer worked perfectly, and was able to sort out the imbalance in a few hours of on/off tinkering. Just make sure you wire it up right. I'm cautious so I monitor that no cell goes over 3.65v (LIFEPO4) and let it get to work. Now I can charge to the proper 14.2-14.6v on these batteries. Many cheap drop in batteries have a BMS that either doesn't balance, or if it does, it's at a pathetic rate of 30ma or so. This seems to be good quality including the case and 18awg balance leads. Highly recommend this active balancer with case! Only wished they also included a small wiring diagram in box. Saved screenshot from desertcart, so wasn't an issue, but it's my only complaint. Review: Holy crap does this work well! - I mean it's simple electrical theory - this balancer should work well. I just didn't think it would work THIS well....especially for the price. I have 16 * 300Ah 3.2v cells that were pretty out of balance, and this balancer got them balanced within a few days! The battery bank is on a Daly BMS which is *supposed* to have balancing, but clearly was not effective. I put this balancer on top of it, and all cells are now almost perfectly balanced. ## Features - [Product Information]: Before connecting the equalization board, check whether each piece of wiring is correct, insulation between the bottom board and the battery connection terminals is required to prevent burnout.Model:3S-4S Suitable : Lithium Iron Phosphate, NCM Ternary Polymer,(Not Fit Lithium Titanate) ,Voltage is 1.8 V-4.5V ,Suggest Battery Capacity: 60-300AH. - [Capacitance Principle]: No external power supply is required,The working principle is Capacitor fit transfers the charge transporter, use the internal energy transfer of the battery to transfer and balance the entire battery pack.the equalization board can be connected to the battery to start the equalization work. - [Protection switch]: With sleep protection, when the voltage is lower than 3V, it will automatically stop and enter the sleep state to reduce the damage to the battery. - [Original Design]:using the original ultra-low internal resistance MOS, 2OZ copper thickness PCB, equalizing current 0-5.5A, The more balanced the battery, the lower the current. - [Satisfactory Service]: We Provide 24-hour online service,If you encounter any problems, Please email SELLER SUPPORT (Not desertcart support), we will give you a perfect solution. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BYFB7YY9 | | Best Sellers Rank | #215,559 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #24,104 in Electrical Equipment | | Brand | Cywhrvzsf | | Color | black | | Customer Reviews | 4.5 out of 5 stars 291 Reviews | | Input Voltage | 4.5 Volts | | Manufacturer | Cywhrvzsf | | Model Number | 3S-4S | | Output Voltage | 4.5 Volts | | Plug Format | Type A | | Plug Type | Type A | | Warranty Description | 1YEAR | ## Product Details - **Brand:** Cywhrvzsf - **Color:** black - **Input Voltage:** 4.5 Volts - **Output Voltage:** 4.5 Volts - **Plug Format:** Type A ## Images ![3S 4S 5A Active Equalizer Whole Group Balancer Lifepo4 Lipo Lto Lithium Active Battery Energy Transfer Equalization Capacitor + Test Board - Image 1](https://m.media-amazon.com/images/I/71-B+225MKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Balances fast and good value *by J***N on January 13, 2024* Bought some 200AH LIFEPO4 drop in batteries (non-smart) and had issues reaching above 13.8v during charge, with more than half of them... I had some suspicions one cell or more were reaching 3.65v before the rest. They still pulled capacity so support wasn't much help. After cracking one open, I confirmed the imbalance. This balancer worked perfectly, and was able to sort out the imbalance in a few hours of on/off tinkering. Just make sure you wire it up right. I'm cautious so I monitor that no cell goes over 3.65v (LIFEPO4) and let it get to work. Now I can charge to the proper 14.2-14.6v on these batteries. Many cheap drop in batteries have a BMS that either doesn't balance, or if it does, it's at a pathetic rate of 30ma or so. This seems to be good quality including the case and 18awg balance leads. Highly recommend this active balancer with case! Only wished they also included a small wiring diagram in box. Saved screenshot from Amazon, so wasn't an issue, but it's my only complaint. ### ⭐⭐⭐⭐⭐ Holy crap does this work well! *by C***K on July 21, 2025* I mean it's simple electrical theory - this balancer should work well. I just didn't think it would work THIS well....especially for the price. I have 16 * 300Ah 3.2v cells that were pretty out of balance, and this balancer got them balanced within a few days! The battery bank is on a Daly BMS which is *supposed* to have balancing, but clearly was not effective. I put this balancer on top of it, and all cells are now almost perfectly balanced. ### ⭐⭐⭐⭐⭐ Does work well. *by S***R on September 14, 2025* These cell balancers do work very well when carefully installed. ## Frequently Bought Together - 3S 4S 5A Active Equalizer Whole Group Balancer Lifepo4 Lipo Lto Lithium Active Battery Energy Transfer Equalization Capacitor + Test Board - 10pcs 2 Awg - 3/8" (M10) Sanuke Wire Lugs Ring Terminal Connectors Ends, UL Listed Heavy Duty for Battery Cable Lug Wire Electrical Eyelets with 3:1 Dual Wall Adhesive Heat Shrink - TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing --- ## 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.co.uk/products/527088701-3s-4s-5a-active-equalizer-whole-group-balancer-lifepo4-lipo](https://www.desertcart.co.uk/products/527088701-3s-4s-5a-active-equalizer-whole-group-balancer-lifepo4-lipo) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-27*