All of a sudden, my Kodak Easy Share digital camera would turn off as soon as it turned on. Or do nothing. Changing batteries didn't help. I even tested all the batteries on a battery tester. The tester was showing the batteries to be OK, when in fact, they were all subprime.
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I found a battery tester at the local Dollar Tree store. Manufacturer is Sunbeam, and it tests all 1.5V (AAA, AA, C and D) and 9V batteries. It shows you the charge level, from 20% to 100%.