Lithium batteries hate being drained to 0V. The CLM18VRB will automatically cut power to your tool when the voltage drops below ~15V. This leaves a residual charge that prevents cell death.
The wheels are plastic with a tread pattern. They are small (approx. 14cm front, 16cm rear). They are durable enough for flat lawns but lack ball bearings, meaning they add a slight bit of friction when pushing compared to premium mowers.
If you cannot find the CLM18VRB in stock, consider these direct competitors. Check your tool's compatibility first.
Modern 18V systems, such as the Milwaukee M18 or Makita LXT , offer significant advantages over the CLM18VRB's older Ni-Cd chemistry: