Despite the size of your iPhone 7 Plus' battery, you may find it's not lasting through the day, especially if you're a power user. Carrying around an external battery pack can be cumbersome, so why not streamline the process and grab a battery case instead. It'll probably bulk things up a bit, but better bulky than a brick.
This case carries an 8500mAh battery, which doubles your battery life. VOOE's case is easy to install and comes in red, pink, and black color options.
Mophie's Juice Pack comes in five colors and has a 2420mAh battery. It has LED indicators on the back and proper cutouts for speakers and your camera.
This slender all-around protective case houses a whopping 8500mAh battery that comes in a black and red color option.
The Trianium Atomic Pro battery case offers 360-degree protection in a sleek and sophisticated design. LED lights are on the back to tell you the charge.
Lonlif's battery case hides its 4000mAh well. It comes four colors, including black, graphite black, ocean blue and rose gold.
Alpatronix's battery case has 5000mAh of power that can be charged wirelessly, even with the phone still in it. Choose between black or blue colors.
Which should you buy?
All of these battery cases will be compatible with both the iPhone 7 Plus and the iPhone 8 Plus. For my money, the VOOE battery case is the best option since it has the most battery power. It should keep your iPhone going at least all day and into the next, and it's protective without being extremely bulky.
If you're wary of buying an unknown brand, the Mophie Juice Pack carries a well-known name, so it's a brand you can trust. Plus it comes in a variety of fun colors and is guaranteed to keep your iPhone's battery secure and running around the clock.