All our cordless tools are DeWalt 18volt. Absolutely no problems. I am always amazed at the large amount of work we can do between charges. I do know DeWalt has 2 lines, one is not as heavy duty and the batteries are light duty too. The new Dewalts have a battery charger with a renew cycle that completely discharges and recharges over an extended period (up to 8hrs). I've been considering getting 12 volt ones for light assembly work and trim outs.
Now for corded tools all our big drills are Milwaukee
