As always. What you pay for is the robustness, which you may not care about, the quality of the build and mounts, which you may not care about, and the quality of the batteries, which you will care about when the recycled laptop batteries die a month after purchase, or explode due to lack of protection circuits or the charger blows up if not electrocutes you, due to lack of safety standards as you get in the EU.
If you’re okay with all that, chinese knock offs are fine for the price. Assuming the airline and/or courier doesn’t confiscate the batteries.
Note that I don’t knock the LEDs. They’re all generally good as cheap or not, they’re the same stuff and all good. The lumens quoted are however complete bollox. That doesn’t mean they aren’t stupidly bright though.