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Battery draining overnight issue

Star III
Please tell us some basic information before asking for help:
Model Name: Max pro M1
Firmware Version: Android 8.1.0, Feb 2019 security patch
Rooted or not: No
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
I just brought a new zenfone max pro m1. For a week battery was going fine. But today it had drained 10 percent overnight while the phone was idle. I did not installed any apps recently. The device is running android 8.1.0 feb 2019 security patch that came preinstalled. I haven't updated it yet. Please help me. And which firmware till now is the most stable one without any bugs & battery draining. Please reply 🙏

Star I
I also have this problem for a month now 55% of battery is drained overnight.

Star I
I also experienced the same problem, but haven't found a solution

Star III

I also experienced the same problem, but haven't found a solution

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Isn't this a software issue?

Zen Master III
Hi there, kindly help us with the following information to find a solution to your query.
firmware version your device is currently on.
share the SOT (Screen on Time) after trying the below:
i. Charge the battery to 100% & use as per your normal usage pattern
ii. When the battery strength reaches 10%, go to settings = Battery => Tap on the battery icon & share the graph
iii. settings => Battery => Check the screen & share the same

Also, please follow below steps may improve battery backup:
1. Close apps that are not used (Bluetooth, WiFi, GPS, etc.)
2. Adjust sleep time and brightness (Settings > Display)
3. Boost memory when you see memory consumption is high with no app running,
4. check for background running applications, stop/disable unwanted apps, you can manage apps from auto-start manager.