Apple iPhone external battery

Because the Apple iPhone uses a built-in, non-removable battery design, even if you don't mind carrying an extra battery with you, it's impossible to swap it into your iPhone when it runs out of power (of course, you might not even be able to buy a spare battery for the iPhone anyway). Recently, a foreign company named Mophie launched a dedicated external power pack for the iPhone called "Juice Pack." For more details, please see below.