Review on GOBOT Cordless Electric Mop: Dual Spin Mopheads, Spray Water Tank, LED Headlight - Ideal for Hardwood & Tile Floors by Billy Balwin

I ordered one of these and it didn't work so I called Revain. They happily refunded my money or sent me another one. I really wanted this product to work so I asked them to send me another one. The second one didn't work either, so I figured there must be something to it. I started scouring the internet for more information and found that the pen has a battery. When I replaced the battery everything worked. The instructions say nothing about the battery in the handle, although looking at the mop made me wonder how the on/off switch would work as there are no wires in the handle to connect to power.