Can I charge my phone with the car engine off?

[McElijah]

You can charge your phone with the car engine off, but it will drain the car battery. If there are other power-consuming devices, it is recommended to start the engine. Otherwise, keeping the battery at a low charge level for a long time can damage the battery, and if the battery charge is too low, the car may not start. Here is some additional information: 1. Charging with the engine off is generally fine: Generally, there is no problem charging your phone to full with the engine off. However, as long as the ignition is on, other electrical devices in the car will also be powered, and over time, this can easily lead to battery drain or even failure to start, as well as damage to the battery. 2. Automatic power cut-off: Some cars will automatically cut off all power a few minutes after the engine is turned off or the car is locked to protect the battery. Rather than risking not being able to start the car or damaging the car battery to charge your phone, it is better to prepare a power bank to keep in the car. The battery is simply "draining" when the engine is off, which is not worth the loss. 3. When the car battery is charging: The battery can be charged by the rotation of the engine. Open the engine hood, and you can see several belt-connected parts, one of which is the car's generator connected to the belt. As the engine runs, the belt drives the generator to produce an electric current, which flows through the vehicle's voltage regulator transformer. After filtering, part of the current is used for the vehicle's operation (such as lights, audio, ignition coil), and the excess part is used to charge the car battery.