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Battery cases and power packs for your iPhone

Mophie Juice Pack Wireless

Anker Ultra-Slim Battery Case

Incipio Offgrid Express

Anker PowerCore+ mini

Trianium Atomic S Battery Case

Zendure A5 portable charger

Mophie Juice Pack Plus

Lepow Pie battery pack and case

OtterBox Resurgence Power Case

UNU Enerpack

UNU iPhone battery case

Tylt Energi Sliding Power Case

Spigen iPhone battery case

And so much more

Not only does the Apple smart battery case have an off-putting bulbous design, but at $99, the case is expensive for its paltry 1,877mAh battery capacity ("mAh" means "milliampere hours" and is a measurement of the battery's capacity. The higher the number, the longer the battery life.)

As such, there are plenty of other options to juice up your handset that you may want to consider. Click through to see some of our favorites.

Caption by / Photo by Sarah Tew/CNET

The Juice Pack Wireless battery case charges the phone wirelessly through the case, and it includes a powerful magnet for use with various mounts and stands. Mounts are expected to cost around $40 while the case should cost about $100 during launch.

Caption by / Photo by Sarah Tew/CNET

Anker's 2,850mAh battery case increases your phone's life by 120 percent. Its capacity is slight lower than some of the competition, but it's 2.9-ounce weight makes up for it. And, at $40 (or £30 in the UK and AU$53 in Australia at current conversion rates), that's a pretty good deal.

Caption by / Photo by Josh Miller/CNET

The Offgrid Express costs less than $100 ($80 to be exact, or £60 and approximately AU$110) but offers a beefy 3,000mAh battery that can double your phone's battery life.

Caption by / Photo by Josh Miller/CNET

If battery cases are too bulky for your liking, or you're happy with the one you currently have, consider an external battery pack. They often provide more power (for less money) than battery cases.

Anker's lipstick-size portable charger is just $10 and provides 3,350mAh -- a bit more than a full charge.

Caption by / Photo by Anker

Trianium's case (which retails for $80 or about £60 and AU$105 converted) sports a 3,100mAh capacity, but still manages to stay slim. In addition to juicing up your phone, the battery case adds a layer of protection with a raised edge around the screen.

Caption by / Photo by Josh Miller/CNET

If you need a lot of extra power, this is your go-to. Zendure's power pack ($55) houses 16,750mAH of extra juice, so you can charge your phone several times without ever looking for an outlet.

Zendure's charger can power two devices at once with a port for small devices (like phones) and another for large devices, like tablets.

Caption by / Photo by Zendure

Mophie's Juice Pack ($119.95 and £109.95, or about AU$167 converted) is more expensive than Apple's battery case, but it provides way more power. The case sports a 3,300mAh battery, and is charged with a Micro-USB cable.

Caption by / Photo by Josh Miller/CNET

Lepow solves the annoyance of a bulky battery case by letting you remove the bulk when you don't need it.

It comes in two parts: a case and a battery pack. When you need to charge up, the battery pack latches on magnetically and plugs into your phone's Lightning adapter.

Its capacity is 3,000mAh -- well more than Apple's case -- and a steal at $33.

Caption by / Photo by Lepow

If you want more protection along with more power, the durable Resurgence Power Case does both. Though it adds more heft to your phone, you'll get that extra peace of mind against everyday bumps and drops.

Caption by / Photo by Josh Miller

Part LED flashlight, part charger, the Enerpack ($44) offers 8,000mAh of juice and two charging ports -- one for small devices like smartphones and another for larger devices, like tablets.

Caption by / Photo by UNU

This 3.8-ounce case is slim and beats the iPhone's battery case with a 2,400mAh capacity.

The best part? Its price. UNU's battery case can be had for just $35.

Caption by / Photo by UNU

Like Lepow's solution, Tylt's two-part juice pack ($80) only adds the bulk when you need it.

Slide the 3,200mAh battery pack on when you need to charge; slide it off when you don't need the extra juice.

Caption by / Photo by Tylt

Spigen's case ($36) doubles the thickness of your iPhone's size and adds 3,100mAh of extra power.

Like many of the other cases listed here, it requires a headphone adapter and lets you know how much it's charged with an LED bar on the back.

Caption by / Photo by Spigen

Need more case options beyond battery packs? Here are dozens more of our favorite iPhone 6 and 6S cases.

Caption by / Photo by Sarah Tew/CNET
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