I just carry one of a hundred different flashlights in my laptop bag, like a Fenix PD35. If not carrying my laptop bag. I carry an Olight i5T (EOS) or about any other single AA light) or a single CR123 light.
I highly recommend not getting an Olight S1R II. They like to stop charging.
I highly recommend not getting an Olight S1R II. They like to stop charging.