This battery tester is good to have when you're in the store buying batteries.
Sometimes they are bad when you buy them. If you have your tester with you, you can check each one of them before you buy them.
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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