I have been using SKIL cordless tools with 20v for most of this year The charger has autopwrjump function. I like its small, compact design for ease of use and storage. Although it has a jump function as a battery booster, I haven't used it. Charges the battery by 25% in 5 minutes. I prefer that a full charge takes about 30 minutes. I also just discovered that it has notches on the bottom so it can be hung on the wall. Nice. I think the only thing that could be better is a beep when charging is complete. Maybe I and most people are used to this, but it's a nice touch.