Alita user. But I guess all Boyue devices are much the same concerning battery usage.

It's fine even with Google Framework enabled... I usually read... I dunno 3 or 4 manga volumes per week on it and fill it once a week. Just don't forget to disable wifi and don't forget to close the apps you are not currently using. And I have auto shutdown after 3 hours. You don't want to have it in the sleep mode since it has more background processes than something like Kobo or Kindle reader which you can have in sleep mode practically the whole time with nearly no battery usage.

I usually download some books (few GBs) from my Calibre server and turn on wifi for few minutes and it burns trough like 20% of the battery just in that few minutes. As I stated in some of my posts I didn't see that kind of massive battery usage with wifi enabled on any of my phones so far. xD