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I've used this on 9-volt, "AA," & "D" batteries. The "D" batteries are a bit fat for the space, but I still got an accurate reading. I found it helps to have the entire unit resting on a table when I test the battery. Otherwise, the battery tends to slip out. I got readings of "good," "fair," & "no good." All seemed accurate.
Verified purchase: Yes | Condition: New
Great little tool! Not just a "voltage" device - which is often very misleading; this Tester (just like the big professional units costing much more) also puts a test-load on the battery to mimic how the battery will perform in duty. If you use batteries, this will pay for itself quickly, and help eliminate guesswork.
Verified purchase: Yes | Condition: New
The perfect item to have in your box of spare batteries. It will check a battery quickly and effectively. So far, I have not had a good battery indicate that it is bad or a bad battery indicate that it is good. It is well made for the price and well worth it for the confidence it will give you that a battery indeed needs to be replaced. I recommend it.
Verified purchase: Yes | Condition: New
I like it ok it works but you have to hold batteries just right to make sure they are in place to be tested. I have another one I like better But yes this one does work.
Verified purchase: Yes | Condition: New
Great Little Handy Tester To Have In Ones Home. Works Like A Charm.
Verified purchase: Yes | Condition: New
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