The one above the rest
I reviewed many cordless clippers.  Many had similar features and excellent reviews so it was challenging to make a choice.  I finally decided on the Hatteker brand because they sell many hair trimmer products, while the rest appeared to sell only one.  This made me think that Hatteker was more focused than the other brands on developing hair-clipper products.  Additionally, 1) the Hattekeker cordless hair-clipper is rechargeable via USB which means it can be charged anywhere in the world as long as you have access to a USB port; 2) two replaceable and rechargeable batteries are included with the kit, each having 2.5 hours of run-time - longer than some name brand clippers; 3) the clipper is completely waterproof; and 4) a tiny bottle of lubricant is included with several other accessories shown in the description.
Rating: 5 stars