I would not use a protected battery unless I had to. They tend to reduce turbo performance on these boost driven lights, are expensive, you have limited choices, you don’t always know what battery is under the wrapper and the extra length and width can make it too big to fit certain lights.
The protected Keeppower 6000mah is a good battery, but the protection circuitry limits it to 10A.
The protected Imalent MRB-266P45 4500mAh is good for 15A, but I don’t know what battery it uses.
The protected Orbtronic 26650 5200mAh is good for 15A, but I don’t know what battery it uses.