i saw this trick on other post, so i just want to share with you (forgot who posted this trick)
used up ALL your battery power, until it shutdown for low battery, then charge it until it became 100%, then you MIGHT see some improvement of your battery.
i tried this trick but i didnt use all the power, i left only 10% the charge it up, and my battery was improved
EDIT: 3 hours later, my battery still on 100% and i have enable all background task (except here drive+), and open Wi-Fi
used up ALL your battery power, until it shutdown for low battery, then charge it until it became 100%, then you MIGHT see some improvement of your battery.
i tried this trick but i didnt use all the power, i left only 10% the charge it up, and my battery was improved
EDIT: 3 hours later, my battery still on 100% and i have enable all background task (except here drive+), and open Wi-Fi