4PCS DC Electric Gear TT Motor DC 3V-6V Prewired Gear Motor Dual Shaft Intelligent Car Chassis for DIY Smart Car Robot Aircraft Toys/Robotic Body/Four-Wheel Drive Toy Car

Used for a few different projects. Not a lot of power, but they work for basic learning for my kids with their Arduino projects.

I initially sort of broke them in by running on as low as 1.5v for a few hours. Then I ran them each at 3.00v and they appeared to draw just 0.086mA and at 5.00v they seemed to draw 0.103mA, both with no load. Even at just 3v they have quite a bit of torque and are very difficult to stall by just grabbing the output shaft. Of course it would be easier if they had larger tires or connected to treads or something. Either way I’m pretty happy with the output torque. I also ended up running all four connected to a DC bench supply for at least eight full hours without any perceivable change in function. I did note that when all four had been running for several hours there was about a 50-80mA current draw drop which is an indication that break-in has occurred at least to some degree.

The first one of these lost all power and can’t drive anything after a single day of use.