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

I had one of these for years. It was very convenient and easy to use to test the batteries I use the most. I also own a very expensive tester which tests a lot more kinds of batteries under loads. It requires its own internal batteries to operate. Because I use it infrequently I don’t keep batteries which could leak in it. So, it takes longer to load the batteries, use it, and unload the batteries. I had a few guests and my first one of these disappeared. Disappointed, I ordered this two pack. These are fast to use. They are a basic go/no-go test which is perfect most of the time. I have lost a lot of items which use these most popular batteries due to damage caused by battery leakage. Replacing them is expensive. Having this kind of tester allows me to quickly test. It’s easy to take a moment to check the batteries in multi battery devices to spot the battery going bad before it leaks. A lot of new batteries from top manufactures leak very early in life. One manufacturer replaced an eight pack of a new model AA battery in the month they were introduced. I opened the pack and one was already leaking. I tested the rest. Over half were failing. I sent them a video. They replaced them and because over half of them were bad I now never use that model. Testing batteries before they fail also saves me money by finding batteries that can still be used. It is a best practice to always replace all batteries at once in any multi-battery device. My kitchen sink faucet uses 6 AA. It starts to fail when a single battery goes bad. I replace them all. I keep the used batteries separate and I am able to reuse them in other devices. Having this kind of tester and reusing still good batteries has dramatically reduced my battery purchases. Because I ordered the two pack I was curious if the measured every battery the same. They do. I recommend these testers because they save a lot of money. They pay for themselves by avoiding damage to battery using devices and by allowing better battery use management to get the best use of every battery.

Worked well, Nice design, Good Price

These Value Priced Battery Testers Are Simle To Operate Covering The Common Batteries For HouseholdUnits, Plus The Tiny Button Batteries. The Reason Five Stars Are Not Given Is That: NO INSTRUCTIONSARE PROVIDED. Having used these types of testers before, a simple one sentence instruction could have been provided. THE POSITIVE (+) END(RED TERMINAL) OF THE BATTERY MUST FACE THE RED SLIDE OF THE BATTERY TESTER AND A SIMPLE PUSH GIVES AN ACCURATE READING.

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.

This tester is fundamentally a voltmeter. It is innovatively designed in a caliper style, which allows the caliper jaws to slide to fit 1.5 volt batteries of different types and sizes, even button batteries. Labels on the scale indicate the manufacturers code designations for each size of battery. It can also read rectangular 9 volt cells.The meter scale does not read in volts however - it has only red, yellow and green zones to indicate the battery's condition, the crossover points for which are embossed in a table on the unit's back.The biggest limitation is that the tester cannot differentiate between standard alkaline and rechargeable batteries, but reads both equally, which gives accurate voltages but inaccurate ranges. It also applies only a 4 ohm resistance to all 1.5 volt batteries while testing, which will tend to give false satisfactory readings on some rechargeables. The first rechargeable NiMH AA cell I tested showed green for voltage, but fails to perform when installed under a load. Since many 1.2 volt rated NiMH and Lithium rechargeables are commonly in use today, I have described this voltage-only tester as being just marginally helpful.

Works well

These work great. They are made as cheaply as possible but they work. Don’t know how long they will last but so far so good. It is nice to confirm a battery is dead before you throw it away

Conclusion: $5 for two of these things you pretty much can't lose. Great for quick tests!Pros:- Lightweight. Great for quick tests without pulling out a more accurate tester with long tangley test leads.I had a small pile of batteries to go through and it made the task quicker and easier.- Nice range of typical home batteries testable.- Straightforward operation.Cons:- Lightweight and not terribly durable feeling. But unless you mistreat it or leave it loose amongst a bunch of other tools, it likely won't break. The slider feels like it will eventually wear out and break with high enough frequency of usage so definitely not BIFL but you shouldn't expect that for the price. With good treatment it should last well enough.- I recommend running the slider back and forth a few times to loosen it up otherwise you can't really operate it with one hand as easily as is intended.- I was expecting it to be spring loaded so you only had to press in one direction to close the gap and test a battery but it's all manual which is a little cumbersome.- Accuracy could be better. With my nicer tester a bunch of batteries that were barely in "Good" range from some prior usage tested well into the "Good" range on this thing. Fully Charged Batteries will be completely to the right in the "Good" range. Keeping that in mind you can assess them correctly despite the lower accuracy.