Dr's Tip of the week...
Unless you have purchased a volt meter battery checker, knowing how much charge a double A, Triple A, C, or D-Cell battery has was always a challenge. With a 9 volt, you could stick it on your tongue and if received a minor shock, it was good.
Well, there is a way of telling when these batteries are bad without any diagnostic equipment. Simply drop the battery from 1/2" over a flat service several times. If the battery lands vertical and stays vertical, it is still good. Empty batteries will fall over every time. Try it!
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Joel Saltzman has over twenty years of wireless industry experience. He is currently CEO and Chief Wireless Analyst for Dr Wireless.