I wanted a way to cut nylon rope that would seal the ends so I used some nichrome wire, a USB rechargeable battery, and some wires and put together something that works pretty well.
-Sketchup files: https://1drv.ms/u/s!AgRy1tCE6lTd-U4rqiM5z5J0_c1y?e=ClpuqQ
-Switches: https://amzn.to/3mk6Oau
-Batteries: https://amzn.to/3kpeHe9
-Wire: https://amzn.to/37DlPQy