I carry a powerbank and various USB C adapters so if someone’s device dies I can help them out. It is a lot cheaper and smaller than carrying around seven different cables.
On top of that I carry Tylenol and bandages.
I used to carry a full first aid bag but kept forgetting to restock on supplies.
I like my reg surefire, but I have a headband with a flashlight loop. It is perfect for my needs, which is mostly handheld to search bags and such, but gives a near zero space headlamp as well.