Sharper Image Deep Tissue Massage Gun(Battery not charging)Direct wire solution

My massage gun stopped working, is a few years old and I didn't want to send it off or anything so I found a quick solution.
This video shows a solution to a non working battery.
Open the gun disconnect both wiring harnesses. Clip the harnesses off leaving as much wire possible.
Next strip enough wire coatingb away from the blacks, reds, and blue wires.
Next twist together reds and blacks and then twist the blue wire into the twisted black wires.
If your issue is the same as mine then this will get your deep tissue massage gun working again but only while it is plugged up to the wall. There will also be no speed control and no power control#MOONTECH

[@Tchor.eth_]

Mine doesn't turn on. I bought it at a flea market. I put it to charge and all the green bulbs come on, but the machine doesn't turn on at all when I press "On". Do you know what it could be?