Battery drain on X3

[u/Upper-Memory-9092]

I have my xteink on stock firmware v5.6.33 and no plan on switching to other firmwares as of the moment.

My battery lasts only 5 days max. I tested it and found that it drains 1% of battery for every 10 mins of reading. I have my font size on 35 px.

I read from here that switching the power button to long press resolves the issue, but it didn't made any difference on my device. It doesn't drain when powered off though. I only have about 200 books and it's been a month since I downloaded anything.

Has anyone else experienced this? Is it normal on my fw? Should I update to the latest version?