Using the 2 battery testers I already have, I couldn't reliably tell whether some button batteries were worth keeping or needed to be replaced. I decided to buy a different one and ordered this one. It is AMAZING. It seemed odd to put a battery in a battery tester in order for it to work, but that point aside it does a fantastic job. No matter what the household battery may be, this will accurately test it and give you a great read out to know exactly how strong it is. These might wind up in stockings this year for the holidays!
LCD Battery Tester For Universal Battery Types - AA, AAA, C, D, 9V, CR2032, CR123A, CR2, CRV3, 2CR5, CRP2, 1.5V/3V Button Cells With Included AAA Battery
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