Specification: Item Type: Battery Capacity Tester Material: Cold Rolled Steel Plug Attributes: 100-240V AC Power Supply Mode: DC 19V-20V, Current 3.5A Discharge Voltage: 0.00-30.00V, The Minimum Step is 0.01V Charging Voltage: 0.10-18.00v, The Minimum Step is 0.01V Discharge Current: 0.10-20.00A, The Minimum Step is 0.01A (The current is automatically limited when the power exceeds the limit) Charging Current: 0.10-5.00A, The Minimum Step is 0.01A (The maximum current 10V is less than the power supply current) DSC-CC Mode (Constant Current Discharge): constant discharge current, used to test battery capacity. DSC-CP Mode (Constant Power): The discharge power is constant, used to simulate constant power equipment. CHG-CV Mode (Constant Voltage Charging): Constant current and constant voltage charging, supporting lithium battery and -. Automatic and Discharge: Support Automatic "-Discharge-" Mode Voltage Measurement: 0.000-4.500V (Low Voltage Range), Accurate to 0.003V, Error ±0.5%; 4.50V-30.00V (High Voltage Range), Accurate to 0.01V, Error ±0.5%. Current Measurement: 0.10-20.00A, Accurate to 0.01A, Error ±0.5% Capacity Measurement: Within 10Ah, The Resolution is 0.001Ah; 10Ah-100Ah, The Resolution is 0.01Ah; 100Ah, The Resolution is 0.1Ah. Wiring Mode: Four-Wire Detection Liquid Crystal Display: It can display test data such as voltage, current, capacity, time, power, and energy. Computer Connection Interface: Dedicated USB to TTL Serial Cable (MiniUSB Port, Not Ordinary USB Cable) Maximum Discharge Power: 85W, 20A within 4.2V, 10A within 8.4V, Less than 10A at Higher Voltage. Package List: 1 x Battery Tester 2 x Test Line 1 x USB to TTL Cable 1 x Adapter 1 x Power Cord 1 x Manual Note: This model product does not support Ni‑MH and Ni‑Cd charging.