Higher altitudes also impact battery performance due to
1. Colder temperatures
2. Thinner atmosphere, since thinner atmosphere increases the 'arc' speed which increases the battery discharge rate.
"In a brief blog post, Google has announced that it is dropping support for Chrome on Android 8 Oreo and Android 9 Pie with the upcoming version 139 of the browser expected to release on August 5."
I still have an old Pocophone F1 without a Sim card that I use for playing music, mostly music I have loaded on a SD card inserted in the Pocophone. The F1 is on Android release 10.