
Just received the 40-v two pack for my Black & Decker mower. The original batteries were worn out after four years of use. These showed up fast, charged quickly and seem to be stronger than the original batteries. I purchased these, rather than a different, cheaper pack based on reviews. I can't rate the longevity/battery life, etc. as these are so new. But they appear to be strong and I hope they last a while. My yard is a half acre and these do the job with the power I am looking for.

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