2Pcs Battery Tester Checker, Universal Battery Checker for AA AAA C D 9V 1.5V Button Cell Household Batteries Smal Electrical Monitor Meter Equipment (Requires No Battery for Operating)

It's a good buy especially for the price. I have so many batteries and sometimes the good one get mixed with the bad one and I hate throwing good ones out. The product is a little cheap but works and can't beat the price. Gave the second one as a stocking stuffer gift to my dad and he also loves it.

No home should be without one of these, and they're inexpensive. If the batteries you check are in the yellow and especially in the red zone, replace them. They could cause permanent damage to what you're trying to protect. I have radio-controlled (commonly known as atomic clocks) clocks, thermometers, etc., around the house. If the battery leaks severely, the item will be junk. I also use a self-stick label to label the item with the month and date changed.

Simple design to check battery power without having to put batteries in the flashlight and close it. Sadly, I have had to throw away a lot of popular brand batteries because they fail years before the printed date. Saves time by not having to open/close flashlights, tv controls, etc.

Works well. Just make sure you put the battery in the correct direction and directly in the center of both ends. Easy to use and such a simple way to take the guess work out of whether to keep or dump a battery. Also love the versatility for all the types of batteries you can easily test with the same gadget.

Bought this to test my batteries and it has saved me a lot of money. Easy to use. Compact so it’s easy to store

Works well, but can be difficult or awkward to use for those who have arthritis or less than average use of hands. Holding the battery between the terminals can almost be a physical dexterity test for some people. Older people or those that trouble with precise use of their hands may be better off with a type of tester where the batteries are tested with wire leads, or have a secure way of placing the batteries in a molded slot for testing. For all others who don't mind a bit of awkward handling of the battery while testing, this is a low cost tester that works well.

works great checking older batteries

Nothing fancy but is a handy battery tester, good price and gets the job done.