2 Pack Battery Tester, Digital LCD Universal Battery Checker for AA AAA C D 9V 3.7V 1.5V Button Cell Household Batteries

These battery testers show the remaining voltage of a variety of common battery types including 9V and button batteries. As opposed to a dial-type meter, these have a digital read-out and a chart imprinted on the tester to show acceptable voltage ranges for each battery type. They feel a bit cheaply made but work well. Buying them in bulk (10-packs) lets you hand them out as useful gifts. Everybody needs a battery tester these days.

Bought a 4pk of this PRO model for me & the normal BT-168 model for my mom. This is better value because it can test more battery types including 3-3.7V lithiums but the regular version is better for users not familiar with what batteries operate at what voltage. This gives numerical voltage whereas the regular BT-168 gives red, yellow, & green ranges Cost is very close between the two. I'd suggest this one for users who know the voltages & suggest the regular version for non-technical users who just want/need a use or don't use indicator. Both battery testers use battery being tested for power source.

Updated:I ordered these because I got tired of digging out a multimeter when I wanted to know the actual voltage remaining in an old battery.I originally reported that the battery tester stopped displaying at voltages below 1.2v. That bothered me though so I decided to retest to see if I received defective battery testers. It turns out that the problem was not with the battery testers but with a new multimeter that I used during the test.I got replacement batteries for an old, proven Radio Shack multimeter and used it for the retest. It showed that my AA test batteries only had 0.3v remaining; they were dead batteries. My new multimeter incorrectly reported the voltage as 1.2v. Based on this, the blank screen is the correct behavior for the battery tester because they powered by the voltage of the battery being tested.As verification, I also tested the old button batteries from the RS multimeter. Both the battery tester and the RS multimeter both reported an appropriate 1.1v while my new multimeter provided a more creative voltage reading. Apparently my new multimeter is not very accurate at low voltages.In the end though, my rating remains the same. If you want to see the remaining voltage of a battery, these battery testers are accurate enough and quicker to use than finding and using a multimeter.Most of the time though, you just want to know if a battery is still good and usable. That check can be made quicker and easier with the version of this tester that has an analog dial display.

After little use the wire attached to the red slider broke off internally and it stopped working. Poorly made product the looks good.

This little tester will test about every battery around the house and shop. from 1.2v Ni-Cd to 9v including Li-ion 4.2v.The handiest test I've owned short of a multimeter.Get ya a couple and you won't be sorry

I got this to test various battery types. I like the digital display so I can get a better feel for battery voltages. The lack of spring takes a little more work for single batteries, but is great for testing a bunch, so you don't have to keep opening the spring for every one. Display is readable at any angle.To properly test a battery a load needs to be put on it, especially for older batteries. This only puts a 1mA load, not enough for any battery type. I'll be adding a 50 or so ohm resistor inside of mine.Testing these, the main area can measure 0.5-4.7V (didn't test higher). The 9V terminals can measure 3-9.6V (didn't risk higher). Accuracy was within 0.05V of a power supply. I noticed that it holds the voltage after initial reading, so it won't jump around as you read it.