The actual cutting area may be significantly lower than the value stated by the manufacturer, which is calculated based on standard operating conditions of dry grass of medium to low height. In the presence of tall or wild grass, grass that has not been mowed to a short length, damp grass or particularly dense grass, the workload increases and the motor requires more absorption of power, resulting in a reduction in the batteries’ actual runtime.
However, the manufacturer’s stated value is fully reliable under favourable cutting conditions, namely on a regularly maintained lawn with dry grass that is not excessively tall or wild, which correspond to the standard conditions used in laboratory tests.
If mowing is carried out regularly on a thin layer of grass that is well-maintained, preferably in the afternoon when the turf is virtually free of moisture, performance may be in line with the stated figures and, in some cases, even exceed the manufacturer’s specifications.
The cutting system also affects energy consumption: collection and mulching require greater thrust from the cutting blade than simple discharge. The condition of the cutting blade has a further impact: a blunt blade increases friction and reduces the number of metres that can actually be mowed on a single charge.
Other factors depend on the terrain. Slopes and uneven ground require higher torque, and engaging the traction drive (if available) results in continuous absorption of power, significantly reducing the actual working time. Sub-optimal temperatures, battery age and repeated sequences of restarting or tight manoeuvres further reduce the available runtime.
Under sub-optimal operating conditions, the difference between the stated area and the area that can actually be mowed is therefore due to the increased load placed on the motor, the blade and the drive system.
The cutting times achievable based on the battery amperage used are listed below:
| 2Ah battery | 117 to 350 m² |
| 4Ah battery | 233 to 700 m² |
| 5Ah battery | 292 to 875 m² |
| Amperes battery | Cutting area |