Why is my battery power is draining fast?

[Natalie Gray]

My battery power is draining fast

I have hardly been using it since I charged it and I was using for half an hour. It went from 90% power to 46%, saying I had 9 hours now it is saying I have 22 minutes remaining. I turned it off to save power, turned it on and was using it for 10 minutes? the power drained.
Whats happening?

Android

It says it has 5h 30 min remaining, android system uses 21% of the battery
It says I have 24 min left.

 

[Natalie Gray]

Re: My battery power is draining fast

I uninstalled voice to text it was using 35% of power, the screen was using 49% now its using 52% of the power.