Features The battery internal resistance tester can measure internal resistance and voltage of the battery at the same time The Kelvin four wire test clamp is adapted in order to better avoid the influence of contact resistance and wire resistance and more accurate measurement can be performed This product adopts intelligent control liquid crystal display and simultaneous insertion of Kalman filter mathematical algorithm which has the advantages of high precision high efficiency low cost light weight energy saving and environmental protection Built in 1000mAh lithium battery 5V charging Android mobile phone charger can be used which is very convenient This product is widely used in various battery production maintenance testing scientific research laboratories and other occasions It can also be used to measure AC resistance of capacitors and resistors with low resistance and high precision Specification Parameters AC resistance DC voltageAccuracy R 0 5 V 0 5 Measurement Range R 0 01m 200 V 0 001 V 75VDCVSignal Source AC 1kHz At 20m range 50mA At 200m 2 range 5mA At 20 200 range 0 5mARange R Automatic and Manual 5 ranges V Automatic and Manual 3 rangesSpeed 10 times secondAdjustment Correction for resistance and voltage separatelyFactory Setting Save factory information restore factory state with one keyBacklight Can turn it on off by entering setting menuEnergy Saving Settings 30 minutes delay it will be turned off automatically