RC3563 Battery Tester High Accuracy Handheld Battery Internal Resistance Tester with LCD Display Screen Item Type: Battery Internal Resistance Tester Material: ABS Rated Operating Conditions: Working Environment: -10℃ To +40℃ Relative Humidity <80% Storage Environment: -20℃ To +80℃ Relative Humidity <80%. Technical Specifications: Basic Accuracy Of Resistance: 0.5% Basic Accuracy Of Voltage: 0.5% Resistance Measurement Range: 1uΩ-200Ω Voltage Measurement Range: 0.0001V To ±100VDC Test Signal Frequency: AC 1KHz Test Signal Current: 2mΩ 20mΩ 50mA 200mΩ 2Ω Gear 5mA 20Ω 200Ω Stages 0.5mA Serial Port: Need To Be Opened In The Machine To Communicate With The Computer, The Default Is Closed, Baud Rate Of 115200 Resistance Range: 6 Ranges Automatically And Manually. Voltage Range: 3 Ranges Automatically And Manually Display Update: 5 Times Per Sec Resistance Calibration: Each Range Individually Calibrated Manually, Do Not Affect Each Other Calibration XY Calibration: Belong To The Resistance Calibration Range, Recalibrate, Enter Into The Resistance Calibration, Press The Setup "SET" Key, Enter Into The Calibration. CALXY Calibration, At This Time, You Must Clamp The Calibration Resistor Around 20mΩ, Long Press The R Key, X, Y Calibration Results, Calibrate In The Same Number For Many Times Is Good Voltage Calibration: Each Range Is Calibrated Manually Without Affecting Each Other. Factory Settings: Save The Factory Information, One Key Can Restore The Factory Status. Backlight Control: Enter The Setting Menu To Turn Off And On. Energy Saving Settings: 20 Minutes Delay, No Operation Automatically Shutdown Charging Power: 5V 1A Charging, Suitable For Android Phone Charger (Not Included) Built In Lithium Polymer Battery: 1000mAh