CarPlay drains battery iOS 12.1 (iPhone 6)

Hi,

Since I've upgraded to iOS 12.1 my battery drains faster than before (I've seen this discussed before), but when using CarPlay I'm losing even battery instead of it being charged. Everything is working on CarPlay (music, Waze, and so on). The iPhone indicates that it's charging, but even when I don't do anything (no music even), I lose battery. Earlier today I was losing 2% every 5 min.

What I'm using:

- iPhone 6

- iOS 12.1

- Enabled: Mobile data, Bluetooth, Wi-Fi

What I tried:

- restarted

- checked for applications using the battery heavily, but found nothing

- searched online for a solution

What I will try:

- disable Bluetooth during my next drive