EBC-A20 is a battery tester with recharge and discharge function, it can be used to test the capacity of lithium battery and leadacid battery (5A recharging, 20A discharge, the maximum power is 85W), support separate recharge and discharge and recharge-discharge-recharge test. It can be connected to the computers, can recharge and discharge repeatedly. Wiring : four-wire detection, voltage measurement and current channel separate wiring to Measurement accuracy LCD display: test data of voltage, current, capacity, time, power, energy, etc. Computer connection: dedicated USB to TTL serial cable. Computer control, drawing curves, calibrating measurement benchmarks, upgrading device firmware, Cycle charging and discharging, etc. Parameter: Power supply mode:DC 19V-24V, current 3.5A or more Voltage setting:0.00-30.00V, minimum step 0.01V (maximum voltage during charging is 18V) Current setting: Discharge:0.10-20.00A, minimum step 0.01A (automatic current limit when power exceeds limit) Charging:0.10-5.00A, minimum step 0.01A (maximum current limited by supply current) Discharge mode: -CC:constant discharge current, used to test battery capacity -CP:constant discharge power, used to constant power equipment -CV:constant current and constant voltage charging, supporting lithium battery and lead acid Automatic charge and discharge: support automatic "charge-discharge-charge" mode, test battery capacity Voltage measurement: 0.000-4.500V (low pressure), accurate to 0.003V, error +-0.5% 4.50V-30.00V (high pressure), accurate to 0.01V, error +-0.5% Current measurement: 0.10-20.00A, accurate to 0.01A, error +-0.5% Capacity measurement: Within 10Ah, resolution 0.001Ah 10Ah-100Ah, resolution 0.01Ah Above 100Ah, resolution 0.1Ah Plug Type:EU Plug,it applies to Indonesia, Germany, France, , Italy and so on. Voltage:AC100-240V Colour:Silver-Gray Material:Metal Size:15x12x12cm Package Contents: 1 * host 2 * test clamp cables 1 * USB to TTL serial port cable 1 * power cord 1 * 19V 4A power adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.