You might look at the [h=2]Astrolux FT03[/h]
It takes a 26650 battery that is rechargeable inside the light. You may get it with a battery, or you may have to buy the battery separately. Although it is a bit of the thrower, it does have a fair amount of spill, and for throwing at the beach from 100 feet away, the spot does spread out a bit.
OTOH, despite giving my grandson options when we go camping, he prefers a home depot defiant 3C triple LED light. They are only about $13 US. I have never run it on the C cells it comes with. I prefer to run it on a single 18650 LiIon battery with an adapter that I made for it fairly easily. The 18650 battery is about $8 a Liitokala charger for about $9 and the adapter made with a bolt cut to size and lots of duct tape can be made for about $5 ? The triple LED gives a broader spot so it is a bit more floody.
If you go the HD method, that opens you up to a myriad of 18650 lights that you can charge outside the light.