This item is a battery checker tester for 9V, D type, C type, AA, AAA, button battery. With it you can easily get the current volt of the tested battry, and know which batteries to keep and which to throw , place your battery between the of the battery tester, and the pointer display will indicate that whether there is a battery need to be replaced. Great tool to check power level of all 1.5V and 9V batteries. Features - A great gadget for instant testing for battery capacity - Portable, easy to use. Just place your battery between the of the battery tester, and the pointer will display the result. - Digital LCD display, Easy to read - Suitable for checking power level of all 1.5V disposable batteries and 9V rechargeable batteries, such as 9V, D type, C type, AA, AAA, and button battery. - With it you can easily get the current volt of the tested battry, and know which batteries to keep and which to throw . Warm tips: - The battery tester is activated by the battery being checked. Keep test times as short as possible, to avoid unnecessary battery drain. - If the pointer does not move, check that battery is touching both contacts before assuming. Specifications - Color: Black - Material: Plastic and metal - Product Size: 11.3 x 6.4 x 3cm - Applicable voltage: 1.5V, 9V - Applicable Battery Model: for 9V, D type, C type, AA, AAA, button battery Package list: 12 x Portable Battery Tester