I've only got the 18 volt stuff. The impact driver has 2.0 amp batteries which reduces the weight but not the performance except for how long a battery will last. I find their tools to be top notch but there are others who only run yellow stuff. I will say this though. In cordless impact wrenches Milwaukee put's the other's to shame. This is based on real world experience on heavy equipment. They are a close second to only air powered tools. Battery powered tools aren't the answer in every situation but they continue to get better and better all the time.