Just need to know what most blenders use Thanks
Most blenders have brush-type motors that look like they could run on DC, but they can't; they run on AC only. Check the ratings on the bottom of the housing of any given blender to find out for certain. I would normally expect to see the words AC only there.
If you plug it into a wall it is an AC motor unless you are in a DC part of Europe. It maybe a dc compatible AC motor if it is variable speed, but basically it is AC. If it is used in your car it may be DC.