I also have this flashlight.
Immediately after delivery, I contacted BG with the LED not centered and the hotspot containing artifacts. The lamp is of very low quality. There was no response from the seller.
Do not complain. I know that shopping in Chinese shops is a risk.
These traders cannot be trusted and rely on honesty.
BG is one of the better ones.
Although I recently bought a USB charger from them that caused a fire and damaged the installation in the apartment a few minutes after connecting to 230V. They continue to sell this life-threatening thing and have not published a review that describes this product.
For these traders, the one-time profit from the deal comes first. Decent behavior or responsibility is the last.
I know it and it depends on me whether I will take this risk.