[WIKI] Xiaomi Redmi Note 7 discharges quickly without SIM and active wireless connections

[GermanAizek]

• Device: Xiaomi Redmi Note 7
• Channel: 20.04 Stable [20.04/arm64/android9plus/stable]
• Build: OTA-2

Information

It is quickly discharged in background without cellular connection and Wi-Fi or Bluetooth connection. Battery is worked in less than 1 day, how do I find out which ubtouch service is most active? LineageOS flashed is enough for 2-3 days and more without SIM card, without WiFi and bluetooth.

[GermanAizek]

My issue discuss here: https://forums.ubports.com/topic/7933/battery-life/11#11

MrT10001
Jul 14, 2022, 7:22 AM

So some further observations. As most technically minded know, battery drain has many factors which include:
Ambient room temperature - batteries drain quicker in extremes of heat such as a heatwave like some are experiencing now.
Software - we all know that app that leaves things open and communicates with wifi, mobile data etc constantly, draining the battery to do this
Background processes
Screen size, type and backlight.
Other hardware requiring different power usage, including where they are placed on the device
Age - older batteries obviously drain quicker, but certain devices have really good batteries that are still alive 9 years after manufacture and still hold a good charge.

Devices I have that battery life lasts less than a day:

Pixel 3a
Pixel 2
Lenovo M10 X605F
Nexus 7 Flo and Deb
Oneplus 2
Motorola E(2015)

I have others awaiting to test.

Devices where battery lasts over a day:

Asus Zenfone
Nexus 4 (8Gb and 16Gb)
Nexus 5 (16Gb and 32Gb)
Oneplus 1 (16Gb, 64Gb)
Xiaomi Redmi Note 7 (just lasts a day and a half)

I install the following apps:
UT Tweak Tools and use it to reduce the launcher and put battery percentage on the top bar
Pure Maps
UNav
Tagger
VPN editor
TELEports
Dekko2

These are my core apps for which I am most likely to use. I don't always connect Dekko up, unless it is on a core device for me, i.e. it is a potential daily driver. I have replaced batteries on some phones with new (some OEM, but most stamped and bar coded as genuine so not cheap knock offs, been burnt with them).

The ASUS Zenfone so far has been the outstanding performer. One charge will last over 5 days on standby (minimal usage) with getting emails on Dekko2 every day, alarms, messages and Telegram.
The Nexus 4 most with the original battery (2013) is an outstanding performer and will last over 5 days on a single charge and battery drain is minimal. For a phone it works, but as the US is or has dropped 3g, there will be complaints about such a device, use Wifi, there are uses for these old devices.
Oneplus One. I have replaced the batteries on some of these and even some of the old batteries, drain is minimal.
Xiaomi Redmi Note 7 - my main UT phone. Lasts about a day and a half on full charge with good usage. Some issues with voice on other phone, but it seems OK now.

I have tested the battery drain against Android ( I will be generic as there are so many revisions) and have found that Android seems to have good optimization. I am testing with /e/OS which is Android based, but degoogled (but they want you to sign up to their OS for updates which I find strange for "privacy") which seems to keep the battery optimization that Android has.

Sorry for the long post, but if I can get some of this out, hopefully it may assist someone. UT is an outstanding open source project in my view. It has some issues, but compared to other device operating systems it is up there. I have also been trying PostmarketOS, which is another Linux device OS for those that don't know and is miles behind UT in terms of devices, apps and usability.