Is the VEVOR 52cc trimmer good for thick brush?

Yes. The 52cc engine and 17-inch swath handle tall grass, weeds and light brush that battery trimmers bog down on. It is not a replacement for a brush cutter on saplings.

What fuel mix does it need?

It is a two-stroke engine, so it runs on gasoline mixed with two-stroke oil, typically at a 1:40 to 1:50 ratio. Check the manual for the exact ratio and use fresh mix.

How does it compare with a battery trimmer?

It has more torque and unlimited runtime, but it is louder, heavier and needs fuel mixing and engine upkeep. Battery trimmers are cleaner and easier to start for light trimming.

Does it come with a shoulder strap and spare line?

Most units ship with a harness and a small spool of line, but contents vary by seller. Confirm the box contents before buying.

Some owners report difficult cold starts and stalling until the carburetor is adjusted. Follow the choke and primer procedure in the manual and use fresh fuel.