If your iPhone's battery is running low and you don't have your charger handy, a case with a built-in battery can be a blessing. This is especially true if a clunky external battery pack that you have to plug into your phone sounds cumbersome. One option is Mophie's Juice Pack Plus, which has been around in one form or another for years. This particular model features a 3,300mAh battery inside its hard-shell case, which promises 120 percent more battery power. (Mophie also recently released a wireless charging case, which you can learn more about in the video below.)
At $119.95 and £109.95 (or about AU$167) the Mophie Juice Pack Plus is pricier than its competitors like Incipio, Trianium and Anker (which fall between $60-80). But it's a good buy for the person who cares tremendously about effortlessly keeping the phone powered up and who doesn't mind carrying extra bulk.
A sliding toggle switch gets the case charging when your iPhone's power starts to dip; indicator lights on the back of Mophie's slide-on case help you keep tabs on how much power it has left. Since the Juice Pack Plus adds extra bulk, Mophie includes a short headphone jack extension in case your pair of headphones don't fit.
There's also a Micro-USB charging cable, which you use to charge the case. That means your iPhone's eight-pin Lightning charger won't work, which is a common case for third-party battery cases (if you're adamant on using only one cable, Apple's own battery case uses the Lightning port).