Gadget
There is a small gadget you can buy that tests all batteries. Is about the size of a large cigarette lighter. Indicates condition of the battery on a scale from good to dead, so you can put aside part-used batteries for future use in clocks, etc. It cost about a fiver. I think I bought it in McQuillans or some similar type DIY store. Is a great thing, I use it at least once a week.
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