Flip phone, low power, long battery life

[ryo]

The battery of the flip phone I photographed a few posts above can easily last an entire month without charging (assuming you leave it mostly on idle).
Flip phones nowadays run off a degoogled Android OS, so it's possible to install Android apps on them via adb (like I showed on the 2nd photo).

i don't doubt you're claim on degoogled android on battery life. if device is only available on android, i'm not interested. i don't trust android anymore, even with degoogled version it's still google's project.

btw, i still have one degoogled modified android, because of its big battery it can last for week, roughly saying.

I just said that flip phones nowadays run on a degoogled Android OS, it doesn't mean that's the reason why the battery can last a month.
I think the reason is rather because the Android that runs on flip phones can use only 1 app at a time, and there are no background processes other than network (3G, 4G, LTE, WiFi, and Bluetooth), phone and email notifications, alarm clock, and system update notification.

Which on one hand is inconvenient, because if I'd use a chat app like LINE or Discord on it, I have no idea whenever somebody talks to me (and in the case of LINE, called to me) until I explicitly open the app.