It was a gift for my partner and not being at all handyman, I have long hesitated between a model 18 V and 14.4 V. Wondering if there was a real difference. And I can tell you that this tool is very powerful. I do not regret this purchase. My companion is very satisfied. The battery takes still some time before discharge, which an asset and more. But we still took a aprt battery more, just in case.