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

Lightweight and accurate tester....can test all batteries in seconds. Size of a adult hand

جهاز فحص بطارية قلوية منتج ممتاز جدا ننصح بشرائه

Fácil de usar, fiable y economico

What a great tool: simple, functional, always "just works". I've had it now almost 5 years, same model (t333, listed now as a "Amazon choice") and I'd bought it at same price shown now. That's sweet. If you need a battery tester, buy it, as it handles so many types-- even button ones, and is so easy. (Indeed, it takes one AAA battery, which I'd totally forgotten about until finding this listing again. I've not changed it since purchase! Of course, it may depend on how often you're testing: I might test a couple a month. But it's lasting.)

Good value for the price. Easy to use & is able to test a variety of sizes (even the round CR2032 for example) EXCEPT AAAA’s. We’re fairly confident it’s accurate.

Especially useful if you use smart home devices such as door/window sensor, zigbee buttons, bluetooth temperature sensor etc., that runs on a wide range of battery types. So you can check if the low battery warning is accurate before you change the battery.

It works as one would expect it to.