Astrolux FT03 - which 26650 battery to use and will my USB adapter work?

I ordered a Astrolux FT03 875m, but I don’t know what kind of 26650 battery would be best or where to buy. I am very worried about battery safety, so I want to make sure the store is 100% legit and has a great reputation. Secondly, how do I know if the cable adapters I have here at home will be safe/optimal to use with this light (USB-C)? I don’t plan on using a separate charger. The whole mA and volts adapter aspect is confusing to me. Thanks!

Where do you live?

Depending on where you live, your battery choices may vary slightly.

Also, use any USB-C cable you can find. The light is limited to draw 2A, and will not draw any more.

I live in eastern US.

How do I know if it’s a C adapter? Or cable? I have many adapters and many cables lol

This guide should help

Thank you! I’m going to assume I don’t have one of these. It’s been a good few years since I bought anything electronic, other than an e-reader. I’ll check its charger out.