Features: The 18650 Battery Tester features revolutionary energy recycling technology that converts discharged power from channels 1 2 into charging energy for channels 3 4, maximizing efficiency while minimizing environmental impacts. This battery chargers intelligently manages charging/discharge cycles through four channels, with plastic housing ensuring safe operate during continuous battery analysis and maintenance. Perfect for electronics enthusiasts, and professional requiring 18650 battery testing and optimized charging solution for power tools or portable electronics. Simplifying your workshop workflow by simultaneously testing discharged batteries in channels 1 2 while automatically recharging others in 3 4, ideal for maintaining multiple packs or solar power backups. Engineered with energy transfer capabilities, this battery analyzers reduces external power dependency by 40% compared to conventional chargers, delivering performances for sustainable energy management. Specifications: Component: Plastic Voltages Resolution: 0.001V Current Resolution: 0.001A Capacity Ranges: 0000-9000ah Power Ranges: 0000-9000Wh Resistance Ranges: 0000-9999mΩ Input: 12V 2A Pattern: Without Bluetooth-compatible/With Bluetooth-compatible Package Includes: 1 Set Charging Station note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.