ZUFECY Battery Tester Checker, Universal Battery Tester for AA AAA C D 9V 1.5V, Small Volt Checker for All Batteries - Orange Color

Simple, digital battery tester that works perfectly. It's very easy to use this to test many common size batteries. The digital readout shows the exact remaining voltage, so it's easy to determine if a battery is good, mid-life, or almost dead. It's better than an analog meter, since I can see the actual voltage at up to 2 decimal places. You can quickly compare the reading to the value listed on the battery, so you'll know how to close to it's intended voltage it produces. Special note for button batteries: you can usually tilt the battery so the + and - ends for smaller batteries will still touch the contacts, so you can see those results too. I had a dozen batteries that I wasn't sure about, so this tester resolved my confusion quickly. It let me eliminate more than half of those batteries since they were just too low. For car remotes, this is just wonderful. It saved me money since it easily verified that the remote itself was a problem instead of the battery.

Bad: AAA slot is a fraction of a millimeter too small so I have to jam AAAs into the slot with more force than I like. Build quality feels cheap but what can you expect for $5? I hope this isn't an issue long term... Good: Exact voltage readout, no battery required - it runs on the battery you're testing, orange color makes it easy to find, did I mention it's cheap? I tested about 20 batteries yesterday of all types and it was relatively quick and easy to see which batteries were fresh, worn, or dead. Much faster than using a multimeter. At this price, it's a great value and easy product to recommend.

Works fine.

FANTASTIC! MUCH EASIER TO USE/READ THAN TESTERS WITH MOVING NEEDLES SINCE WITH MOVING NEEDLES YOU NEED TO BE IN A GOOD LIGHT TO SEE AND GUESS WHERE IT POINTS.

I've had a few of these over the years, starting with the one that used a battery but this one reads the voltage instead of the stack of small bars and doesn't need a battery to operate.

I ordered Feb 15, 2026... Today is April 25, 2026. So that's 70 days. YUP it no longer works. What a CROCK! Of course the window is 60 days on Amazon to claim a defect. It wasn't a lot of money but do NOT waste your money. It did work for the first 2 months but now in month 3 it is kaput! It was a bit tight fitting some batteries in between contacts. The display was legible. It looked like it COULD have been a good tester... BUT like so many other things from CHlNA it's JUNK!

I purchased this because it was cheap. It is cheap. It takes a lot of force to get AAA & AA batteries into contact with the measurement terminals. The measurement (as compared with two Fluke multimeters) was a tenth of a volt low. I could not get button batteries (2032, 2016) to be measured at all. On batteries that were nearly dead, it didn't read at all. I think this is because the power to operate it comes from the battery under test. With some force it works. But I wish I'd spent a few more bucks and got something with a little more quality.

Seems very accurate and easy to read and use, would definitely buy again!