USB ports integrated into a car's onboard system were initially designed for data transfer, not for powering devices. Redaksiya reports that many drivers habitually connect their phones to their car's USB port to charge the battery on the road. However, according to expert research, this is a bad idea if you want to protect your battery's health and charge quickly.
The reason for this is that USB ports integrated into a car's onboard system are primarily intended for data transfer (e.g., for Android Auto or CarPlay), not for powering devices. Their output current is usually very low, which causes charging to be very slow, writes HowToGeek.
Even ports marked as "for charging" often do not provide enough power for modern smartphones with large batteries and fast charging support.
Recently, the author of the material decided to charge a Samsung S25+ model by connecting it to the USB-C port in the car, with the battery level at 56%. He expected the phone to charge quickly, but saw a notification on the screen indicating that it would take 2 hours and 51 minutes to reach full charge. With a normal power adapter, the device can charge from 0 to 50% in 30 minutes.
Experts advise against using built-in USB ports and instead recommend using an adapter that plugs into the 12V cigarette lighter socket (DC connector), such as a UGREEN 130W.
Such sockets are designed for higher current and 120-240W power, which is sufficient for fast and efficient charging of phones, tablets, laptops, and other devices directly in the car.
In short: car USB ports are too slow, so it's better to use a separate car charger connected to the 12V connector of the cigarette lighter for normal charging speeds.
Previously, experts had selected the top 5 new Android smartphones with removable batteries. A detachable design means you can replace the battery independently and extend the gadget's lifespan.
Users were also explained what to do when a green dot appears on their phone. This is a built-in security feature, not a virus or system malfunction.