You’ve got your awesome Bluetooth keyboard but you don’t remember how long it’s been since you charged it. You hate to go out for a run or cycle and halfway through get that dreaded battery low alert. In iOS 9 for iPad, you can quickly find the battery status of any Bluetooth connected device including the Apple Watch, Bluetooth Keyboard ,headphones and speakers and even the phone itself.
How to :
Scroll up to reveal the Edit button
Tap the green/white + button next to Batteries.
You may want to add other items from your list, or delete some from the ones above by tapping the red/white – button. You can also rearrange the items in Today by dragging the 3-line icons on the right up and down.
Click Done in the upper right.