{"product_id":"4s-5a-active-balancer-lifepo4-cell-equaliser","title":"4S 5A Active Balancer - LiFePO4\/Li-ion Cell Equaliser","description":"\u003ch2\u003e4S 5A Active Balancer: Precision Cell Equalisation for LiFePO4 and Li-ion Battery Packs\u003c\/h2\u003e \u003ch3\u003eMaintain Peak Battery Performance with Capacitive Energy Transfer Balancing\u003c\/h3\u003e \u003cp\u003eThe \u003cstrong\u003e4S 5A Active Balancer\u003c\/strong\u003e is a high-efficiency \u003cstrong\u003ebattery equaliser\u003c\/strong\u003e designed to keep your \u003cstrong\u003eLiFePO4\u003c\/strong\u003e or \u003cstrong\u003eLi-ion\u003c\/strong\u003e cells in perfect balance. By actively transferring energy from higher-voltage cells to lower-voltage cells, it maximises usable capacity, extends cycle life, and prevents premature failure caused by cell imbalance. This module is an essential component for anyone managing 3S or 4S lithium battery banks in caravans, RVs, marine systems, solar storage, or off-grid power setups.\u003c\/p\u003e \u003cp\u003eUnlike passive balancing boards that waste excess energy as heat, this \u003cstrong\u003eactive balancer\u003c\/strong\u003e uses a capacitive energy transfer method to redistribute charge efficiently across the entire pack simultaneously. The result is faster balancing, less energy loss, and cooler operation, even under continuous use.\u003c\/p\u003e \u003ch3\u003eWhy Active Balancing Matters for Lithium Batteries\u003c\/h3\u003e \u003cp\u003eIn series-connected lithium battery packs, slight differences in cell capacity, internal resistance, or temperature can cause voltage drift over time. Without balancing, the weakest cell limits the entire pack's performance, leading to reduced runtime, premature low-voltage cutoffs, and accelerated degradation. An \u003cstrong\u003eactive cell balancer\u003c\/strong\u003e like this unit continuously corrects these imbalances, ensuring every cell reaches full charge and discharges evenly. This is particularly critical for \u003cstrong\u003elithium iron phosphate (LiFePO4)\u003c\/strong\u003e batteries, which have a very flat voltage curve and require precise balancing to maintain state-of-charge accuracy.\u003c\/p\u003e \u003ch3\u003eKey Features\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cstrong\u003e5.5A peak balancing current\u003c\/strong\u003e dynamically adjusts based on voltage difference, delivering rapid equalisation for large capacity packs (60-300Ah recommended)\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eCapacitive energy transfer\u003c\/strong\u003e technology shifts charge between all cells simultaneously, minimising energy loss and heat generation\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eUltra-precise balancing\u003c\/strong\u003e with voltage accuracy within 5mV, ensuring optimal cell matching and maximum pack capacity\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eWide compatibility\u003c\/strong\u003e with ternary lithium (NMC), lithium iron phosphate (LiFePO4), and lithium titanate (LTO) chemistries across a 2.7V-4.2V working range\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eUnder-voltage sleep protection\u003c\/strong\u003e automatically puts the balancer into a low-power state (\u0026lt;0.1mA) when cell voltage drops below 2.7V, preventing over-discharge\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eRobust construction\u003c\/strong\u003e with ultra-low resistance MOSFETs and a 2oz copper PCB for reliable, high-current operation and long service life\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eCompact and lightweight\u003c\/strong\u003e at just 66 x 46 x 16mm, easily integrated into existing battery enclosures or DIY power walls\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eEngineered for Australian Conditions\u003c\/h3\u003e \u003cp\u003eWhether you're building a \u003cstrong\u003e12V lithium battery balancer\u003c\/strong\u003e for your caravan, a \u003cstrong\u003e48V LiFePO4 battery balancer\u003c\/strong\u003e for an off-grid solar system, or maintaining a marine house bank, this module is built to perform. It requires no external power supply, drawing only about 13mA during operation and entering a deep sleep mode when cells are low. The wide operating temperature range (-10°C to 60°C) suits the diverse Australian climate, from cold highland mornings to hot outback afternoons.\u003c\/p\u003e \u003cp\u003eInstallation is straightforward: simply connect the balance leads to each cell in the correct order, and the board begins equalising automatically. The adaptive balancing current means it works efficiently with both small voltage differences (0.5A at 0.01V delta) and larger imbalances (up to 5.5A), making it suitable for both maintenance and initial top-balancing of new packs.\u003c\/p\u003e \u003ch3\u003eApplications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cstrong\u003eCaravan and RV lithium battery banks\u003c\/strong\u003e – keep your 12V LiFePO4 cells balanced for reliable off-grid power\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eMarine and boat electrical systems\u003c\/strong\u003e – maintain house battery health in saltwater environments\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eSolar energy storage\u003c\/strong\u003e – balance 24V or 48V battery stacks for maximum energy harvest and longevity\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eDIY power walls and e-bike\/e-scooter packs\u003c\/strong\u003e – ensure safe, even charging and discharging of series-connected cells\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eBackup and UPS systems\u003c\/strong\u003e – prevent cell drift that can cause unexpected shutdowns\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eProtect Your Battery Investment\u003c\/h3\u003e \u003cp\u003eDon't let cell imbalance silently reduce your battery's capacity and lifespan. Add the \u003cstrong\u003e4S 5A Active Balancer\u003c\/strong\u003e to your lithium battery system today and experience the benefits of precise, efficient equalisation. Whether you're upgrading an existing setup or building a new pack, this balancer delivers the performance and reliability needed for demanding Australian applications.\u003c\/p\u003e","brand":"Unbranded","offers":[{"title":"Default Title","offer_id":55056649781587,"sku":"Li-4S-5A-Bal","price":15.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1076\/9324\/4755\/files\/Li-4S-5A-Bal_65d3529f-792a-4424-b1e8-a767bc0f74b4.png?v=1790335832","url":"https:\/\/progradewarehouse.com\/products\/4s-5a-active-balancer-lifepo4-cell-equaliser","provider":"PRO GRADE WAREHOUSE","version":"1.0","type":"link"}