Features: High Precise 5V 20A Battery Capacity Tester delivers ±1% measurement accuracy for reliabled charges/discharge data, featuring intelligent over voltages/current protective to safeguards equipment during rigorous battery performances evaluations. Engineered with adjustable 0.5A-20A charging current and 1.25V-4.50V voltages ranging, this tester supports diverse battery types while its active cooling systems maintains stability under 40℃/3A loads for prolonged operations. Ideal for battery manufacturers, laboratory technicians, and engineers requiring professional diagnostics, as well as home users managing power tool batteries or EV charging stations. Optimize battery life in industrial R&D labs, production lines, or home workshops through cyclic charges/discharge/rest phases, addressing performances degradation in batteries. The sheet metal housing withstands high frequency testing environments, while multi stage aging analysis and balancing modes ensures consistent battery health monitoring across commercial and DIYer applications. Specifications: Component: Aluminum alloy shell, wear-resistant Size: Approx.198x86mm/7.8x3.39inch Weight: 0.98 kg (without adapter) Color: Black/Silver Input voltages: 19V/4.74A Discharge power:150W Package Includes: 1pcs Battery Capacity Tester note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.