
Have been using similar ones for many years and the style has changed a bit but basically the same product. We have purchased several of these devices for our growing business to keep our devices from charging. I don't care what they say, our phone batteries last longer if you don't let them charge overnight. We also use them to turn off the charge on our Dewalt chargers after they have been charged for a few hours. This helps to save batteries and chargers and gives us peace of mind that after leaving the store there will not be a fire caused by faulty chargers. We got one that didn't work on the last order, but for the most part they seem like a pretty decent product so far. worth $$.

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