Is 800 lumens realistic for this light?

Treat the figure with caution. A 500mAh battery and a small COB panel cannot sustain that output for long, and the brightest mode will dim quickly. Expect useful light closer to a standard keychain flashlight.

How long does the battery last?

Shein does not publish runtimes. On low it should last a few hours; on the brightest mode expect well under an hour before output drops. Recharging is by USB-C from any phone charger.

Does the magnet hold it securely?

It sticks well to bare steel such as a fridge or a car body panel. It will slide on painted, curved or thin metal, so test it before relying on it overhead.

No water-resistance rating is listed. Keep it out of rain and don't drop it in water. It is fine for damp hands but not for outdoor use in wet weather.

What comes in the box?

One COB keychain flashlight and one USB-C charging cable. No wall adapter is included, so use a standard phone charger.

How does it compare with a branded keychain light?

It is smaller and cheaper-feeling than lights from Olight, Nitecore or Fenix, with no published runtime or water rating. The magnet and USB-C are useful, but buy a branded light if you need reliable output.