Features: Ensure best battery Protections and extend life with our Lithium Iron Phosphate Protections Board, designs to support Multiple lithium battery packs with a maximums continuous current of 20A. Featuring overcharge, over discharges , and short Circuits Protections, this board intelligently balances Voltages for enhances battery pack stability. Ideal for electronic engineers, electric vehicle enthusiasts, and battery pack users who prioritize safety and Performances. Perfectly suited for applications in electric bicycles, power tool , and energy storage devices where stable power management is vital . This Protections board is crafted from plastic, making it a reliable choice for those search efficient power solution in demanding environment . Specifications: Material: plastic Size: about 5x5cm/1.97x1.97inch Type: 4S20A/4S30A(optional) Package Includes: 1xBattery Protections Board note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.