it usually overheats about 15-20 mins onto a nitro race

the parts that get hot are on the bottom on the case so if they are up in the air they stay cooler

some work fine and some overheat shutdown

you can test yours by putting it in a sealed shoebox with temp and heat it using a blowdryer to 160ish if it shuts down you have a bad one

I have some of both with both color stickers.....