I just bought 2 starter robot kits and came with the 25mm motors with the black PCB board in the back, they are way underpowered using fresh Alkaline AA batteries, after some reading about this motors I saw other people complaining about how underpowered they are so I decided to raise the voltage going into the main controller by using a 3S lipo 11-12v. Now they have good power using the tracks or wheels. Are this motors mislabeled?
So far they I have use them around my home in the carpet and they don’t get to hot, just warm using tracks, the 3 wheel frame was built the other day, no problems either.
Here is a video of the motors on 3S (Speed 1 and then Speed 9)