This Makita hammer drill uses chucks with a keyless system. It runs on a rechargeable battery, so it's completely cordless.
From Data Powertools
Makita DHP486RTJ 18V LXT Brushless Combi Drill With 2x 5Ah Batteries
Tools4trade
Makita DHP486RTJ 18V Brushless Combi Drill with 2 x 5.0Ah Batteries Charger & Case - 18V