Features:  Quick Test the condition of your battery in seconds.  Has a movable arm to accommodate the battery.  Test different sizes of batteries in only one unit.  This gadget really works when you don 't know which batteries to keep  And which to throw away. Place a battery between the two points of the battery tester  And it will make the right decision for you in seconds.  Universal Battery Volt Tester AA AAA C D 9V Button Cell    Descriptions:  Portable handheld design with compact size and light weight  Used to test the following sizes: 9V Batteries / 1.5V Button cells / 1.5V Regular or rechargeable batteries, such as AA, AAA, C, D  Easy-to-read color-code scale indicates power level.    Specifications:  Model: BT806  Material: Plastic  Color: Black  Size: 54.8*52.8*23.4mm  Net Weight: 31g    Package Included:  1 x Battery Tester (Battery not included)