If your iPhone 6 battery is running low, there are a few things you can do to help get it back up to speed. Here are four tips on how to reset your iPhone 6 battery:

  1. Charge the battery overnight: If you have enough juice left in your battery, charging it overnight will help give it a boost. Plug in your iPhone 6 and let it charge until the light turns green.
  2. Clear the cache and data: If you’ve been using your iPhone 6 a lot, clearing the cache and data can help free up some space on the device so that the battery can work more efficiently. To clear the cache, go to Settings > General > Usage > Cache and tap Clear All. To clear the data, go to Settings > General > Usage > Data and tap Clear All.
  3. Turn off features that aren’t being used: Some features of iOS can use a lot of power, so turning them off when they’re not being used can save some juice on your battery. To do this, open Settings and scroll down until you see an option called “Background App Refresh” or “App Store & App Use” (depending on which app you’re using). Tap that option and turn it off for each app that you want to disable in this way.
  4. Resetting your iPhone 6’s settings: If none of these tips work, sometimes resetting your device’s settings will help get things moving again for your battery life. To do this, hold down both buttons (the Home button and Sleep/Wake button) at once until you see an Apple logo appear onscreen; then release both buttons simultaneously and wait for iOS to start up again (it may take a few minutes). When iOS has started up again, go through all of its menus—Settings included—and try turning off some of the features that you disabled in step 2 above if possible ..