I tested these batteries on both a Dewalt 20v Chainsaw and a Dewalt 20v angle grinder. Both of those tools are really hard on batteries. I have the OEM 5ah batteries and these batteries worked just the same in every way. I have tried many generic batteries for the Dewalt now and these ones are the best so far. I really like the fact the Ah rating isn't over stated which is usually the case. These are an excellent value for the money and would highly recommend them.
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