The Amprobe BAT-250 Battery Tester is designed for one-handed, comfortable and reliable battery measurements. The uniquely designed tester offers an ergonomic slider and a v-shaped side cradle to better hold batteries in place during testing and a contoured case shape that fits neatly in your hand. Testing your batteries has never been easier. Quickly indicates if batteries are good, low or replace" Test standard and rechargeable batteries: 9V, AA, AAA, C, D, 1.5V button type Ergonomic design is easy to hold Side cradle holds batteries in place during testing No batteries required to operate Large, upright display is easier to read V-shaped cradle holds batteries securely in place during testing for consistently accurate results High-qualtity 9V Contacts Slider is shaped for easier operation and one-handed testing Case shape contours to your hand for easy operation Included accesories: User's manual