Siri, although, helpful, drains a lot of your battery. It's not her fault, though, she's just trying to help us find the nearest café, gas station, and put our favorite tune on… So, instead of having her run 24/7, put her on hold for a bit.
To disable Siri:
- Go to your Settings
- Click on General
- Select Siri and turn her off
Should you need her, hold down your lock button or, press down on your Home button (depending on the model of your iPhone)