iOS: How to Keep Your iPhone Alive When Your Battery’s Dangerously Low (Lifehacker)

Lifehacker: iOS: How to Keep Your iPhone Alive When Your Battery’s Dangerously Low. “It used to be that when I went out late in the city, I’d play a rousing game of ‘How long can I keep my phone alive so I can listen to music on the way home?’ I would throw my phone into airplane mode, turn the brightness down, and hope it would last until I made it back to my apartment. Apple has since improved the way it handles battery life, though it doesn’t do everything it could to ensure your phone stays on. There are a few more tricks of the trade you can use to keep your iPhone alive as long as possible. “