The massive leap in capacity between 18650 and 21700 is very appealing, and what gives the 21700 enough power to act as a powerbank. Powerbank charging from a torch isn’t something I’d ever do though, I’d prefer to carry something separate. I’ve got a couple of lights that use 21700, a Wurkkos TS30 throw nutter is one that is suited to it.
To me, and it’s just my usage, 18650 in a multifunction torch/worklight is just about right. I never run an 18650 right down and reckon it’s an easier size to carry.
There is flashing red on the IF24, there’s flashing every colour, the fun factor of the RGB lights is much improved. And you can set the rotary switch rather than lots of tippy tapping the side switch and then having the thing come on in turbo
Oh yeah, Olight. Yes, they’re very pushy with their advertising and give away lots of lights for reviews. The torches are pretty good but expensive for what they are, and you’re buying into a brand that often has proprietary batteries, built in batteries, or a unique charging system. You won’t find much love for Olight amongst enthusiasts.