Some newer models of lawnmowers, however, feature a self-charging system known as an alternator or a charging port that allows the battery to recharge while the engine is running. These self-charging models use the engine's power to generate electricity and provide a charge to the battery.
In such lawnmowers, the engine drives a small alternator or generates an electrical current that's fed into the battery, gradually replenishing its power reserves while the lawnmower is in operation. This allows for uninterrupted usage without the need for external recharging as long as the engine keeps running.
Please note that the specifics of charging might vary among different lawnmower models and manufacturers, so always refer to the user manual or check with the mower's manufacturer for detailed information or recommendations about your specific lawnmower charging capabilities.