This is my cordless Milwaukee grinder. It cost $150 Canadian, and came with a 4 amp hour battery and charger.
It is an exceptionally easy tool to use. The on/off switch fits the hand perfectly.
I use it for sharpening everything from shovels to Sawzall blades. For the Sawzall blades, a thin cutting wheel is used.
Today, I used it to cut staples that were sticking from recycled engineered flooring. On the test block shown, there were 20 staples. I used the stopwatch on my phone and determined that I could do it in 38 seconds. If I wasn't timing, it probably would have taken 45 or 50 seconds. Much faster than extracting the staples by any other means. I tried my pneumatic denailer, and it was not effective. These skinny staples, bent and did not shoot out, like nails do.
The battery
lights indicate how much charge is left, and how recharging is progressing.
A very useful tool for cutting and sharpening. I'm able to achieve speeds that would not be possible if a cord where dragged around.