Which gear should be engaged when charging the car at idle speed?

[JaylaLee]

When charging the vehicle at idle speed in place, the gear selection should be determined based on specific conditions: 1. When charging the vehicle battery at idle speed on a flat surface without any slope, no other gear needs to be engaged. 2. When parking, the P gear should be engaged. Both the N gear and P gear in an automatic transmission are neutral gears, but the P gear has an additional parking function to prevent the vehicle from sliding. 3. When charging at idle speed on a sloped road, the mechanical handbrake should be tightly engaged to prevent the vehicle from rolling. 4. If the vehicle is parked for a long time, it is best to disconnect the negative cable of the battery to reduce power consumption. The battery can be charged monthly using a charger, or the engine can be started to idle for 20 minutes every week to prevent the battery from losing power.