Best dog Clipper

My dog clipper broke down four months ago, and I want to trim my dog, for he is getting very uncomfortable lately. The first clipper started humming in loud noise and also stopped cutting the dog coat. To make matters worse, it stopped charging, and I that when I decided to buy another clipper. Right now, the dog coat is thick and needs cutting immediately, which is the best clipper that can give me a longer time service?