The 28V Milwaukee still outperforms the M18 range, it's a great shame they are not developing it any more. Deals like this help to keep the tools performing as intended. Don't bother with the clones, they don't give the same current and high power tools just break them in short order. If you are a doubter then just compare the m28chpx against the m18chpx on the job, the 28v hits way harder and these batteries just keep on going. I know the specs are close but in the real world there is no comparison.