In the past week I picked up a Warsun T7 pocket sized flat flashlight from Amazon. It's a handy little light for when you need to get some work done and don't need or want something super bright.
It charges via USB-C and has multiple modes, all controlled with a single button.
The case is made from aluminum. One end has an LED while the opposite end has a magnet so you can hang it to provide area illumination, e.g., under the hood of a car.
Here are some pictures showing its size, next to a quarter for reference.
Not counting the pocket clip, it's 0.30" thick, 4.4" long, and about 0.95" wide. It slips comfortably in a pocket like a thin pocket knife.
It's plenty bright for walking around in the dark. Today I took advantage of the side light while working to clear a slow drain. It was perfect for illuminating under a bathroom vanity.
I can't comment yet on run time but it should be at least a few hours when used on low. If I have one criticism it's that it relies on one button to cycle through all the modes, and I'd just assume that it didn't have a strobe mode for the side LED. But for $12 on Prime (or $23 for a two pack) I can't complain.