Feature:1. Power Checker: Can be applied for the test of current, power, dynamic test, ageing, etc. of various DC power supplies.2. Practical Use: Also can be used to test the discharge time, capacity and internal resistance of a variety of batteries.3. Clear Display: LCD screen display, human computer interaction interface and true 4 wire measurement ensure high accuracy.4. Reliable Work: Comes with power down memory, over voltage protection, over current protection and so on for safer working.5. Easy to Operate: Having been connected to computer through USB cable, the monitor allows you to query historical curves.Specification:Item Type: Battery TesterMaterial: IronFunction: Intelligent battery power comprehensive tester. ModelMD150MD250Power Supply ModeDC 12V 2AConstant Discharge Current Adjustment Range0.1-20AMaximum Discharge Current Error0.01AMaximum Discharge Power150W250WDischarge VoltageDC 0.5V-30VDischarge ModeConstant Current (CC) Constant Voltage (CV)Constant Resistance (CR) Constant Power (CP)Dynamic Load Test (DS)Constant Current Resistance Range0.1-30Discharge Current Adjustment Accuracy0.1AInternal Resistance Range1mR-500mRMaximum Discharge Capacity99999mAHMaximum Discharge Time99: 99: 99sReverse Polarity Protection+-Over Voltage Protection OVPStop Working When Greater Than 30VOver Current Protection OCPStop Working When Greater Than 10AStop Working When Greater Than 20AOver Power Protection OPPStop Working When Greater Than 150wStop Working When Greater Than 250wBuilt In Over Temperature Protection OTPStop Working Above 75.Package List:1 x Battery Tester1 x Testing Line (1 Set)1 x USB Data CableNote:1. It is shipped without power supply, and the power supply needs to be purchased separately.2. Please use it within the proper current and voltage range.