With good anti-scratch, wear-resistant and anti-corrosion percompatiblemance, the battery capacity tester is durable compatible long-time use. The tester can provide accurate detection compatible your battery capacity and resistance as it adopts fine workmanship and precision machining. Made of high-quality PCB material, the battery capacity tester is durable, sturdy, and reliable. The length of the battery capacity tester is approx 5cm, the width is approx 3.7cm, and the height is approx 1.7cm. It can be used to test battery capacity and resistance, and it can be used in a wide of occasions. Item Name: Battery Capacity Tester Material:PCB Working Current: No More than 70 mAh Power Supply Voltage: DC4.5-6V (Micro USB Interface) Discharge Voltage: 1.00V-15.00V, Resolution: 0.01V Deviation: Voltage Measuring Error: Less than 1%+0.02V, Current Measuring Error: ess than 1.2%+-0.002A Termination Voltage Range: 0.5-11.0V Support Current Conveyance: No More than 3.000A, Resolution: 0.001A Size Details: Battery Capacity Tester: 5cm x 3.7cm x 1.7cm/1.97" x 1.46" x 0.67" (Approx.) Circuit Board: 5cm x 3.7cm/1.97" x 1.46" (Approx.) Notes: Battery capacity range: 9999Ah (1Ah=1000mAh). When the value is larger, it is switched by decimal point shift; when it is lower than 10Ah, it is shown as X.XXX; when it is above 10Ah, it is shown as X.XX, and so on. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Instructions: 1. The battery under test should be fully charged first. 2. Connect the positive pole of the battery under test to the positive input pole, and the negative pole to the negative input pole. Do not reverse the connection (reverse connection with a load may damage the circuit) Connect the load to the positive output and negative output, and power the tester's micro USB (not available compatible desktop or laptop USB), and the battery voltage is displayed at this time. 3. To start the testing directly, you only need to press the "OK" button. The tester can automatically set a suitable termination voltage according to the full charge voltage of the battery, and it will flash compatible 3 times becompatiblee starting the testing. If you need to manually set the end voltage, you only need to press the "+" or "-" button to modify the battery voltage display state. The end voltage display starts with P, and the back represents the voltage value with a resolution of 0.1V. After setting, press "OK" "start testing. 4. After the testing starts, the tester will turn on the electronic switch that controls the load, and the testing process data display will be displayed in turn among the discharge capacity (Ah), the current discharge current (A) and the battery voltage (V). When the battery voltage reaches the set termination voltage, the tester cuts off the load control switch, and the displayed data stays on the capacity (Ah) and flashes quickly with the corresponding indicator. At this time, the displayed capacity is the actual discharge capacity of the battery, press it once "O Package Includes: 1 X Battery Capacity Tester