Specification: Item Type: Battery Capacity Tester Material: ABS Weight: Approx. 130g/4.6oz Product Size: Approx. 11 x 6 x 2.5cm/4.3 x 2.4 x 1in Function: Almost All 1.5V Batteries and 9V Batteries and Button Batteries Can Be Tested Test environment: 0-40 ℃, 25%-80%RH Comparison of Remaining Battery Capacity and Voltage: 9V Battery: The full voltage of NiMH, Lithium and Alkaline is different, but it must be above 8V, and generally below 7V when the battery is out 1.5V Disposable Batteries (Including 1.5V Alkaline Button Batteries): about 1.6V when completely charged, and about 1.0V when the battery is out; 1.2V Ni-MH, Ni-Cd Rechargeable Battery: about 1.3V when completely charged, about 1.0V when the battery is out Package List: 2 x Battery Capacity Tester Note: 1. Please allow 0‑2 cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. The digital display of the test result can test 1.5V or 9V batteries and quickly measure the battery voltage. You can quickly test your battery, let you know whether to charge the battery to extend the battery life. Suitable for home use, this small tool can prompt you whether the battery is in good condition or needs to be replaced. Simple and effective small battery detector detector, compact size, light weight, easy to carry. The shell is made of high‑quality ABS material, wear‑resistant and waterproof, not easy to damage, and long service life.