1、SAFE TO USE It is suitable for home use, the big small tool can tell you whether your battery is good, low, or needs to be replaced. 2、LIGHTWEIGHT AND PORTABLE Simple and effective small battery detector detector, compact size, light weight, easy to carry. 3、EASY TO USE You can quickly test your battery, whether to charge the battery to extend the battery life. 4、PERFECT BATTERY TESTING TOOL It needs to be used regularly, and the digital display of the test result is convenient for observation. 5、WIDE RANGE OF APPLICATIONS The battery capacity tester can test 1.5V or 9V batteries and quickly measure battery voltage. Item Type: Battery Tester Material: ABS Weight: Approx. 45g / 1.6oz Product Size: Approx. 11x6x2.5cm / 4.3x2.4x1.0in Function: Almost all 1.5V batteries and 9V batteries and button batteries can be tested Comparison of remaining battery capacity and voltage: 9V Battery: The full voltage of Ni-MH, Lithium, and Alkaline are different, but it must be above 8V, and generally below 7V when there is no electricity; 1.5V Disposable Batteries (including 1.5V alkaline button batteries): about 1.6V when fully charged, and about 1.0V when discharged; 1.2v Ni-MH, Ni-Cd Rechargeable Batteries: About 1.3V when fully charged, and about 1.0V without power Nominal battery voltage Battery model 1.5V AAA,HP6,MN2400,RO3,AA,HP7,MN1500,UM3 C,HP11,MN1400,UM2,D,HP2,MN1300,UM1 Buttons, small batteries Discrimination 1.28~1.50-9V good 1.15~1.27V bad 1.14V replacement 9V 6F22 ,PP3 ,MN1604 Discrimination 7.8~9V good 6~7.7V bad replace it below 5.9V 1 x Battery Tester