Recommendation request: What is a good minimalist soldering iron setup for flashlight mods? - programming.dev

There are some great posts by experienced modders here. I’m not one, but I want to start making simple modifications beyond swapping reflectors. For example, swapping out a 5a linear driver for a 5a buck in a Convoy S6. For a simple job like unsoldering two wires then soldering them, is there a small usb or battery-powered iron that would do the job without spending too much on the initial investment? Any input is appreciated!