Features: Ensuring safety of your lithium batteries with our 4S 18650 lithium batteries 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 enthusiasts, hobbyists, and professional 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 charging, this board ensures efficient and safe charging and discharging cycles for your devices. Perfect for safeguarding 4S lithium batteries packs in solar charging systems, electric scooters, portable electronics, or industrial equipment where stable electricity control is critical. Specifications: Component:Plastic Size:Approx. 72.2mm/2.84inch Overcharge: 4.25-4.35v±0.05v Overdischarge: 2.3-3.0v±0.05v Operating current upper limit: 4-5A Current: 6-8A Instantaneous current: 12A Working temperature: -40-50℃ Storage temperature: -40-80℃ Quiescent current: less than 6uA Life cycle: more than 50,000 hours Resistance: less than 45mΩ Charging: 16.8-17V Package Includes: 6Pcs 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.