18 of 24Image
Reduce auto-lock period to switch off backlight
Reducing how long it takes for your iPhone to switch its display off can help to considerably conserve battery life. When the smartphone is put down on a table, for example, it can take a minute or two — perhaps even longer — for the display to turn off. This means the display can quietly eat away at the device's battery life while it's not actively being used.
Go to Settings > General > Auto-Lock, then set this to 1 Minute or 2 Minutes, depending on your preferences. The shorter the time period, the greater the benefits to your iPhone's battery life.