Nearly every major power tool brand has an large selection of battery packs to go with its products. Some even have multiple battery systems intended for different use cases. For example ...

"Love these for their size and weight. Small and light but also very powerful. Brushless technology is awesome." ...

Milwaukee’s Gen II M12 Stubby impact wrench ... That’s thanks to the 12-volt battery compared the DeWalt’s 20-volt. Will the Gen II M12 Stubby impact replace your full-size 1/2-inch impact?