Redmi Note 4 - Improve Battery standby consumption

The Redmi Note 4 - Mediatek version is not known for good battery backup despite it's 4100mAh battery. The Mediatek x20 SoC can never beat the Snapdragon 625 SoC in power efficiency. But what we can do is try to conserve battery using some tweaks and settings.

Android Marshmallow introduced a great feature called Doze. Below is a brief description of Doze ( taken from https://developer.android.com).

Doze reduces battery consumption by deferring background CPU and network activity for apps when the device is unused for long periods of time. If a user leaves a device unplugged and stationary for a period of time, with the screen off, the device enters Doze mode. In Doze mode, the system attempts to conserve battery by restricting apps' access to network and CPU-intensive services. It also prevents apps from accessing the network and defers their jobs, syncs, and standard alarms. Periodically, the system exits Doze for a brief time to let apps complete their deferred activities. During this maintenance window, the system runs all pending syncs, jobs, and alarms, and lets apps access the network.

The problem with Doze is it could take 30 minutes or more for it to activate; even longer if you keep moving your phone around without even using it.

The solution is forcing Doze to activate as soon as the screen is turned off. We can do this by installing this wonderful app from Google Play store, called Naptime. But you would need a rooted phone as well. Just install the app and enable it. Voila! Now you have great battery standby time.

You can whitelist apps like Whatsapp, so that messages come through without delay. Goto Settings>Battery>Manage apps battery usage>Choose apps. Choose Whatsapp, and select 'No restrictions'.

Screenshots of battery statistics