The Milwaukee 18V M18 2x3.0Ah RED LI-ION HIGH OUTPUT Battery/Charger Kit 4933471072 is an ideal kit for all trade professionals as well as DIYers. The battery packs provides up to 50% more power when compared against an M18 REDLITHIUM-ION battery pack. The Charger charges 2.0Ah, 4.0Ah, 5.0ah, 6.0Ah and 9.0Ah battery packs and can charge an M12 and M18 at the same time. This kit includes two 3.0Ah Batteries and a charger.