2 Pack Battery Tester, Universal Battery Checker for AA / AAA / C / D / 9V / 1.5V Button Cell Batteries

Battery testers are very usable. I have one for home and 1. I keep it school. We have lots of batteries for the children's toys. This helps a lot

I was surprised that this worked exactly the way it’s supposed to. I experimented with it when I first got it, with New, used, and dead batteries, and it worked exactly as advertised.It’s been very handy rather than having to try out batteries in equipment to see if they have any juice in them, and still not knowing how much they have in them. It’s such a simple piece of equipment, I wish I’d purchased it a long time ago and I would definitely buy it again if my daughter steals mine lol.

Item came quickly, works good, great tester for the price! It's not as easy as some to use but it's fine.

Handy tools, work well

They arrived as described and I think they work? My smart lock stopped working and the key pad would not illuminate (hallmarks signal the batteries are dead) so I ordered these as I feel like I’m replacing the batteries fairly often. I test every battery and they all showed yellow, not red, despite being completely out of juice. I ordered these testers as they were inexpensive and I wanted to know whether the issue was with battery use or the keypad. I’m assuming it’s a battery issue. In terms of functionality, these worked okay… but they should have read in the red zone. I took one star off for that. I took another star off because they don’t feel very sturdy or durable. It served my need, but I wouldn’t buy these if I was going to need them often or in a bind. They just don’t seem overly accurate or reliable.Would in order them again? No. Would I recommend them? Depends.

It’s not the CADDILAC of battery charge checking equipment but does the job. Works as described for aaa, AA, and 9v batteries.

It was easy to use and just keeping it with the batteries to keep checking them!!’

I love these things. Inexpensive, cheap plastic, but they WORK. I got tired of throwing away batteries that I knew still had some juice in them. For example, I have a battery-operated motion light in my bathroom. Yesterday, the light was dim, indicating it needed new batteries. But after testing all four batteries in the unit, only one was dead. I would have replaced all four without this handy little gadget. I took away one star only because the design forces you to hold the battery in place while you slide the red knob. It's a little tricky, but could be designed better.