Features: Ensuring safety of your lithium batteries with our 4S 8A Lithium Battery charging Protective Board, provide balance and Protective for 14.8V Cell Module. This Protective board features lightweight build, ensuring stable performances and durability for all your battery needs. Ideal for DIY enthusiasts, hobbyists, and professionals who work with lithium batteries, including 18650 and lithium batteries, without size limitations. With its low current consumption and multiple protections against over discharge, over current, and over charge, this board ensures efficient and safe charging and discharging cycles for your devices. Perfect for safeguarding 4S lithium battery packs in solar charging systems, electric scooters, portable electronics, or industrial equipment where stable electricity control is critical. Specifications: Size: Approx.52x18mm/2.05x0.71inch Continuous discharge current: 0.1~8A Discharge current: 16A Charging electricity (standard): 16.8V Charging current: 0.1~8A Overcharge detection electricity: 4.20±0.025V Overcharging protective delay: 0.2s Overcharge release electricity: 4.08±0.05V Overdischarge detection electricity: 2.50±0.05V Overdischarge detection delay: 0.1S Overdischarge release electricity: 2.9±0.1V Overcurrent detection electricity: 150mV Overcurrent detection delay: 9ms Overcurrent protective current: 20±5A Main circuit on internal resistance: ≤25mΩ Package Includes: 1Pc Protective Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.