Please tell us some basic information before asking for help: Model Name: Asus 6z(India edition) Firmware Version: Rooted or not: Not 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. ======================================== Recently I am having sudden battery drainage issues. I charged my phone to 100% and stopped all the apps. Closed all the network connection and kept phone in airplane mode. Still the battery got drained to 80% in less than 1 hour. PFA battery graph.