I second the Nitecore MT22A, a very high quality, tiny, robust and lightweight torch, though not conforming to some popular opinions of LED tint, CRI or UI. I like and trust this beyond almost any of my other torches. A couple of Eneloops, or better still Energiser lithium AAs and you are good to go.

Otherwise maybe consider a good head torch, more useful in my usage, such as one of the Petzl Tactikkas, running off x3 AAA of any description, or even a lithium rechargeable pack, made in France, to similar standards.

I carry both on my long distance hikes, if I run out of power (unlikely) I can pick up some alkalines at any shop, garage etc.

Frankly anything using rechargeable lithium cells is not suited to my application, much as I love them when not in the wilderness for several days.

Polycarbonate is a more rugged and much lighter material for this sort of device than boring cylindrical aluminium tubes. Only used when tooling charges can be amortised, instead of just sending a CNC program to the lowest bidder, and waiting for the copies and counterfeits to emerge.

When I want to carry such a device and weight, performance and reliability is important I also have a Nitecore with die-cast magnesium alloy body taking x2 18650 (or x4 CR123) side by side. They also do one which takes x4 AAs. The Jetbeam PA40 is also an oldie x4 AA but still great, in this form-factor, polycarbonate body too.

These are all pricey, reflecting quality and excellence, but substantial discount codes are often available here.