Features: 1SAFE 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. 2LIGHTWEIGHT AND PORTABLE Simple and effective small battery detector detector compact size light weight easy to carry. 3EASY TO USE You can quickly test your battery whether to charge the battery to extend the battery life. 4PERFECT BATTERY TESTING TOOL It needs to be used regularly and the digital display of the test result is convenient for observation. 5WIDE RANGE OF APPLICATIONS The battery capacity tester can test 1.5V or 9V batteries and quickly measure battery voltage. Specification: Item Type: Battery TesterMaterial: ABSWeight: Approx. 45g / 1.6ozProduct Size: Approx. 11x6x2.5cm / 4.3x2.4x1.0inFunction: Almost all 1.5V batteries and 9V batteries and button batteries can be testedComparison 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 AAAHP6MN2400RO3AAHP7MN1500UM3CHP11MN1400UM2DHP2MN1300UM1Buttons 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 Package List: 1 xBattery Tester Note: 1. Please allow 1‑2cm 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.