Battery backup is first handedly dependent on your daily usage rather than kernel or rom. what will you do of 3 mins battery backup you saved because of using a specific kernel versions or changing things. It is accurately depended on your usage and your battery.
When I use my phone, I get upto 6 hour bb but when I don't, I get upto 20+ hour battery backup. Magic?

Recommended kernels:
Wathever for miui (balanced)
Neutrino for aosp ( battery/balanced)
Hermes for aosp ( performance)
Genom for aosp ( balanced)

For downloads search on internet and see @rn9files channel

⚙ [ App manager ]

Features:

•Install/uninstall APK files, APKS, APKM , XAPK with OBB files

•remove user and system apps

•Full Backup app+ data

•Launch activities and services

•Create shortcuts of apps and
activities

•Share apps in APK files

•view kill, force-stop, running apps or processes

•Control battery optimization


- requested root

Unlock Logo Remover For Merlinx

STEPS:

-Download the zip
-Go on recovery
-Tap Install and select zip
-Reboot the phone and ...
Now the small "Unlock" logo will be removed!

Guide by @marzGab

Download ⬇️

• MI FLASH TOOL

• MI FLASH TOOL PRO

• SP FLASH TOOL

•XIAOMI ADB FASTBOOT TOOL ( required open jdk + hotspot )

Redmi note 9/Redmi 10x 4G is merlin

🔥MTK Vest Tweaks🔥

>This is app for battery saving/gaming mode. It will also add 3gb to ZRAM!
>It also includes fast charging module! Enjoy with 18W charging power(recommended)
>Just flash via magisk and reboot!
>Open apk and change your Governor.
>>>ENJOY!<<<
Credits:
Kamil (for note) and @rehan1478 for sharing module.

Steps For Dirty Flash:

(1) Flash Rom
(2) Wipe Dalvik and Cache
(3) Reboot

Note: OTA Update is basically Dirty Flashing

Note: Dirty Flashing is Responsible for bugs in many cases

USEFUL INFO OF REDMI NOTE 9:

Codename: merlinx/ merlin/ merlinnfc

Name on China : Redmi 10X 4G

Cpu: Helio G85 (12nm)

Hardware:MT6768

GPU: Mali-G52

Released With: Android 10/MIUI 11

Treble:
Supported / A only / vndk v31

Density (dpi):
440 dpi (xxhdpi)

Resolution:
2340 x 1080

Ram :3/4/6 gb

Memory: 64/128gb

Gaming: no

All guides for rn9 modding:
https://forum.xda-developers.com/t/faq-guide-help-assistance-solution-centre-for-merlin-redmi-note-9-redmi-10x-4g.4225163/

SDK PLATFORM TOOLS FOR WINDOWS,LINUX AND MAC

DOWNLOAD THE LATEST VERSION

Fix Internet Not Working From Hotspot
• Go To Setting > Network & Internet > Hotspot And Tethering And Enable Allow Clients To use VPN
• Download 1.1.1.1 DNS/VPN From Here
• Turn on 1.1.1.1 DNS When you are sharing Hotspot

Credits : @Aakash_Noob

And me @dipesh1674 for posting here

Tutorial how to fix NVRAM warning: https://telegra.ph/How-to-fix-NVRAM-WARNING-Err--0x10-error-permanently-02-21

Instant Bootloader Unlock :

❗ Only for mtk chipset devices

Requirements :
• pc/laptop


Steps :
• download this zip file and extract in your PC/Laptop

• open that extracted folder

• install driver ( UsbDk 1.0.22 )
win 32bit users install x86
win 64bit users install x64

• click on unlockbootloader.bat

• connect your device press & holding both volume buttons using data cable

• after command window closed
Remove the data cable
Reboot your device

🔴 Watch Tutorial

All credit goes to :
All MTK-bypass Team

1. Reboot your pc/laptop into disable driver signature mode.
Tutorial: here
2. Download drivers from here or here
3.Extract the drivers
4. Right click and install the android_winusb.inf file

This file fixes fastboot drivers in windows pc

Simply extract the folder in this zip and run install_fastboot_drivers.bat as administrator

(Tested on Win 7/8/10/11)

libusb + mtk_bypass_rev3.7z