Where are you located? If in the US, you can get the same Panasonic/Sanyo protected cell for 1/3rd the price. Nitecore, Olight & Xtar don’t make batteries, they re-wrap Panasonic/Sanyo with their name on the wrapper, and charge an arm and a leg for it. If you are not in the US, then I have no idea where you can get them.
Example here, and if you want even a better one, here
Exactly, Keeppower, Orbtronic, Ewa, and Efest for that matter, don’t manufacture batteries. They re-wrap them. Panasonic/Sanyo doesn’t make a battery with a protection circuit, they are added by resellers. In the case of Liionwholesale, they add a Seiko protection circuit.