This is simple to use, can test most (all?) household type batteries, small form factor, and pretty inexpensive.I used it on the batteries we had used for Christmas; where before I would have thrown them out, I found that all had more than enough juice left. Further, I replaced our smoke detector 9Volts on New Years. In the past, I've simply thrown them away. But the ones I replaced had 90+ charge left. Good savings so far.Further evaluation necessary to confirm the actual charge remaining is accurately reflected by the tool but I'm pretty certain it will come out well.
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