Features: 4S 14.8V 20A Protections Board ensures precise overcharge/over discharge/short circuits protections for 14.8V Li batteries, featuring 16.8V charge voltages and ±0.05V voltages accuracy to optimizes 18650 battery performances. Builts with highly temperature resistant materials, this lithiums battery protections module operates at -40°C to +50°C, delivers 12A continuous current, and maintains low standby power consumption (<20μA) for stable energy management. Ideal for DIY electronics enthusiasts, remote model builders, and engineers designing drones, electric vehicles, or solar powered systems requiring reliable 4cell Li battery pack. Safeguards power tool, energy storage devices, or portable medicals equipment with its automatic load recovery function and balanced voltages monitoring across 4s 18650 batteries. Engineered for seamlessly integration, this module includes clear wiring labels (B , B1 B3, B+) and strict compatibility guidelines to prevent mismatched cell voltages in lithiums battery applications. Specifications: Component:Plastic Size:Approx.37x37x3.2mm/1.45x1.45x0.12inch Continuous working current:12A Working voltages:14.8V Supported battery count: 4section Charging Overcurrent Protections: 20A Applicable scenario:Electric car; Option Type:1pc,3pcs; Package Includes: Package A 1pc 18650 Battery Charge protections Board Package B 3pcs 18650 Battery Charge protections Board note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.