Tenergy T-333 Universal Battery Tester, LCD Display, Cell Checker, Multi-Purpose Small Battery Tester, for AA, AAA, C, D, 9V, CR123A, CR2, CRV3, 2CR5k CRP2, and Button Cell Batteries TEST VARIOUS SIZED BATTERIES - A versatile digital battery tester that works for a variety of sizes from AA, AAA, C, D, 9V, CR123A, CR2, CRV3, 2CR5, CR-P2, and even button cell batteries as well. BATTERY HEALTH - Quickly find out how much power is left in your battery. One of the few battery checkers with an easy to read metering LCD screen. Determine if your battery is poor, weak, or good. Get a longer battery lifespan by not overcharging partially full rechargeable batteries. SIMPLE AND ACCURATE - A precise universal battery checker that is easy to use. Place your test battery into the battery checker to quickly see how much power is left. The included battery provides a reliable and accurate source of energy to evaluate your test batteries. RELIABLE TOOL - The T-333 household battery tester is great for finding out if your everyday devices need new batteries, or if that device is faulty. Check your batteries for things like toys, cameras, camping electronics, remote sensors, flashlights, watches, and or smoke detectors. SAVE MONEY AND REDUCE WASTE - With Tenergy's battery health tester, you will no longer guess if a battery is in good condition. Maximize your battery usage by testing for dead batteries and reduce unnecessary waste. Includes one year warranty support. A variety of popular household battery types: AAA, AA, C, D, 9V and CR123A, CR2, CRV3, 2CR5, CR-P2, and various button cell batteries. 1x T-333 Universal Battery Checker 1x AAA battery