10 best iPhone 6S battery cases to keep your iPhone juiced up

Apple refined its smartphone formula with the iPhone 6S and brought a few new features to the table, but the battery life is a definite disappointment. While smartphone tech continues to advance, the battery remains its weakest link. Thankfully, there is something you can do about it. If you’re sick of your iPhone running out juice on the go, you might want to opt for a protective case that touts more than just hard-shell components and a raised lip. Below are the best iPhone 6S battery cases available.

Our favorite iPhone 6S battery cases

Innoant Air Case ($40)

Innoants Air Case
Jessica Lee Star/Digital Trends
  • Capacity – 2,400mAh
  • Output – 1A
  • Size – 5.5 x 2.7 x 0.47 inches
  • Weight – 73g (2.60z)

Most battery cases are bulky, but Innoant’s Air Case adds just 3.8 millimeters of thickness to your iPhone 6S. Even better, it still manages to pack a sizeable battery into the sleek frame, essentially doubling the length of time you can expect to go between charges. It’s a two-part design that combines stylish aluminum edges with a soft-touch, rubber back plate. Unlike some iPhone 6S battery cases, it’s also easy to fit and remove.

The Air Case has a standard Lightning jack for charging and it supports pass-through charging, so you can charge your iPhone 6S first. There’s a power button near the bottom of the back, too, which comes equipped with four LEDs that indicate the remaining power. You’ll find decent button covers and cut-outs for your phone’s camera, switch, ports, and speaker. Sadly, the headphone port is quite tight, so it won’t fit every set of headphones.

It’s available on Indiegogo right now at a reduced price, which is a bargain. The full retail price is expected to be around $80. Read our full review.

Indiegogo

Moshi iGlaze Ion Case ($100)

Moshi iGlaze on iPhone 6s Battery Case
Philip Chung/Digital Trends
  • Capacity – 2,750mAh
  • Output – 2.1A
  • Size – 6.26 x 2.8 x 0.79 inches
  • Weight – 128g (4.51oz)

There are a couple of compelling reasons to consider this stylish two-piece case from Moshi. First, it combines a basic case with a removable battery, so when the battery has done its work, or you want to travel light, you can simply remove it. It also charges faster than most battery cases because it’s capable of 2.1A input and output.

Moshi’s brushed-metal finish looks great, and capitalizes on a tough polycarbonate and a microfiber lining. It offers decent protection, too, and there are button covers and accurate openings for your phone’s switch, ports, camera, and even the Apple logo on the back. The battery portion of the case mimics the metallic look, and has a standard power button with four LEDs to show the remaining power. The case will double your iPhone 6S’s battery life (and then some). It charges via a Micro USB port, however, rather than a Lightning port. The battery base is also compatible with Moshi’s leather Napa case, if you want to mix and match.

This is a very chunky and heavy option, but the fact that you can remove the battery when you’re done with it goes some way toward mitigating the extra bulk. You’ll also struggle to use the headphone port with some connectors, but Moshi does include an extension cable to cope with that issue. Read our full review.

Amazon

Anker Ultra Slim Battery Case ($34)

Anker Ultra Slim Battery Case
  • Capacity – 2,850mAh
  • Output – 1A
  • Size – 5.5 x 1.2 x 0.16 inches
  • Weight – 82g (2.9oz)

You get an awful lot of power within a slim, low-priced package when you opt for Anker’s offering. The big battery in this case will more than double the battery life of your iPhone 6S. It’s a polycarbonate case with a soft-touch, matte exterior that not only adds some extra grip, but also collects fingerprint smudges. The two-piece design is fairly easy to fit around your phone, but, like many battery cases, it’s not going to provide much in the way of drop protection.

Most of the bulk is in the bottom section of this case and you’ll probably have to use the supplied audio jack extender if you want to plug in headphones or earphones. There’s a power button on the back, and four LEDs to show the remaining power. Unfortunately, it’s a bit too easy to accidentally turn the power button on when you place the case down, or shove it in your pocket. This case is MFi-certified, though, and it charges via a Micro USB cable. It comes bundled with a short cable, and at this price, it offers a lot of power within an impressive package.

Amazon

Fonesalesman iQi PWRcase ($55)

Fonesalesman iQi PWRcase
  • Capacity – 1,550mAh
  • Output – 1A
  • Size – 6.06 x 2.75 x 0.55 inches
  • Weight – 86g (3.03oz)

You get a respectable chunk of extra power from this case. It provides around 50 percent more battery life than usual. It’s a relatively low return, considering that it’s quite a chunky and bulky case, but there’s more to it than meets the eye. The added attraction here is wireless charging. When your iPhone 6S is wearing this case, you can place it on any Qi wireless charging pad, and it will start to charge up, albeit fairly slowly. It’s really convenient, though, and it saves you from fiddling around with cables.

The case itself has a thick back panel containing the Qi charging receiver and the battery. You’ll find a standard power button on the back with four LEDs to show remaining power. Sadly, it adds a lot of bulk at bottom of your iPhone where it plugs into the Lightning port. The vast majority of iPhone battery cases have this unsightly bulky bottom, and it also limits access to the audio port, so you may need an adapter for your headphones. You’ll use a Micro USB cable to plug into the case and charge it up (cable included). It is fully MFi certified.

The case itself is comfortable to handle. The soft, flexible sides are pretty simple, and there’s a raised lip to protect the screen. The flexible section is light grey to contrast with the black of the main body, and there’s a very subtle logo on the back. If you aren’t attracted by the wireless charging capability, you might feel that the battery is a bit too small to make it worth considering, but the case is also very affordable.

Amazon

Kuner Kuke Case ($80)

Kuner Kuke Case
  • Capacity – 2,400mAh
  • Output – 1A
  • Size – 5.59 x 2.79 x 0.43 inches
  • Weight – 68.5g (2.41oz)

We’re impressed at what Kuner has managed to pack into such a slim, lightweight case with the Kuke, which was successfully funded on Indiegogo. This is the slimmest and lightest option on our list. It comprises a glossy, hard, polycarbonate back panel in white or black, with a standard power button and four LED display, combined with a flexible black frame that sports button covers and accurate cut-outs. Perhaps the best thing about the Kuke case is the fact that there’s no big, bulky section added on the bottom of your iPhone, and you can use your standard Lightning cable with it for charging and syncing.

The battery is big enough to offer up to a 70 percent boost for your iPhone’s battery, and there’s also some extra storage space in there. We looked at the 16GB version, but there is a 64GB version, too. Using the Kuke app, you can organize your extra space and offload photos, videos, and other files into the case storage.

There’s no sign of MFi certification, though, and the app isn’t particularly well-designed. These two factors along with some dodgy translation work, worry us a little bit. However, it seems to work as advertised and the form factor of the Kuke is really impressive. If you’re desperate to get away from bulky solutions, then you’ll want to check it out.

Amazon  Kuner

5 more great iPhone 6S battery cases

Spyder PowerShadow Battery Case ($100)

Spyder 2
  • Capacity – 2,750mAh
  • Output – 1A
  • Size – 5.94 x 2.79 x 0.57 inches
  • Weight – 81g (2.86oz)

Perhaps the biggest downside to battery cases is the added bulk and weight. Fortunately, Spyder has produced a lightweight battery case that will double the battery life of your iPhone 6S. The power button is on the bottom, and remaining power is shown via a stylish Spyder logo on the back, which lights up. This is a unibody case that provides a really snug fit, but it’s not easy to take off.

The case has a matte, soft-touch finish that comes in black, white, champagne (gold), or titanium (silver). It also features button covers for the volume and sleep/wake keys, cutouts for the camera and mute switch, and sliding covers for the audio jack and micro USB port. It’s even water-resistant, offers an antimicrobial coating, and features drop protection for up to 5 feet.

Best of all, you can charge and sync the iPhone 6S through the case. It also has power connectors on the bottom that are designed to work with the PowerShadow dock, so you don’t need to fiddle with cables. Unfortunately, it’s sold separately and costs $40. If you want something light and protective that still packs in a lot of power, this is worth a look.

Amazon

PhoneSuit Elite 6 Pro Battery Case ($80)

PhoneSuit Elite 6 Pro Battery Case
  • Capacity – 3,000mAh
  • Output – 1.5A
  • Size – 6.02 x 2.79 x 0.55 inches
  • Weight – 100g (3.52oz)

You can expect a little more than double your usual battery life when your iPhone 6S is wearing the PhoneSuit Elite 6 Pro case. It’s a fairly slim, attractive, rounded case with a standard LED display on the back and five lights to indicate the remaining power. There are touch controls housed on either side of the display, too. If you touch the left side for a second, you can light up the remaining power display. You can also touch the left and right sides together for three seconds to start or stop charging.

It has a metallic finish — available in black, red, or blue — but it features a soft-touch coating that makes it very comfortable to handle. It’s actually made of polycarbonate and comprised of two pieces for an easy fit. There are covers for the volume and sleep/wake buttons, along with a protective lip around the edge of the display. This is a tough case, which meets military drop test standard 810G, and provides openings for the ports and an extender for the audio jack. When you plug in, it will charge the iPhone first, and there’s pass-through for iTunes syncing. Overall, this is a good blend of power and protection in a reasonably stylish package.

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Prong PWR Case ($100)

Prong PWR Case
  • Capacity – 2,600mAh
  • Output – 1A
  • Size – 6.15 x 2.98 x 0.82 inches
  • Weight – 136g (4.79oz)

The clever thing about the Prong PWR case is that it has a built-in electrical socket adaptor that fold out of the back, enabling you to plug it directly into a power outlet. You’re looking at around double the usual battery life from this case. There are four LEDs on the back to show you how much power is left, but they also show through on the front, meaning you can check the remaining power while the case is plugged into the wall. There’s a simple power button on the bottom.

The PWR case also has a two-piece design — a bumper with a clear back panel that can as a standalone protective case, along with a separate battery portion into which you slide the bumper. That means you can ditch the battery part when it’s dead, but remain protected. The case is rounded, fairly plain, and features a soft-touch finish. It additionally includes a micro USB port in case you want to charge it via a cable, as well as cutouts for the audio jack and side switch.

The battery portion of this case is pretty chunky and heavy, which is inevitable given it houses a plug, but they’re easy to fold out and do save you from carrying cables. The case comes in black, blue and grey, red and white, or in a transparent style. The wall prongs and the separate bumper case are thoughtful design touches, and they justify the extra bulk, weight, and expense.

Amazon  Prong

Incipio Ghost Qi Wireless Charging Battery Case ($100)

Incipio Ghost Qi Wireless Charging Battery Case
  • Capacity – 2,100mAh
  • Output – 1A
  • Size – 6.1 x 2.78 x 0.55 inches
  • Weight – 100g (3.52oz)

The standout feature of this case is the support for Qi wireless charging. If your iPhone 6S is wearing this case, then you can charge it by placing it on any Qi wireless charging pad. You won’t get a full charge from the onboard battery, but it should offer up to around 80 percent extra power. There’s a silver power button on the back, with a standard four LED array to show remaining power.

The top and bottom of the case are matte black, but there’s also a panel on the back designed to match Incipio’s Shine range of cases with a brushed metal effect. This case will protect your iPhone 6S from damage, and there’s even a raised lip round the display. It takes a standard micro USB cable and features an audio extender for the audio jack. The button covers for the volume and sleep/wake keys are also easy to use.

That said, the bottom section is quite bulky and the battery capacity isn’t that high. It’s not really worth looking at unless you intend to take advantage of the wireless charging capability. Not having to wrestle with a cable for the nightly charge is very refreshing, so we recommend giving it a try.

Amazon  Incipio Adorama

Mophie Juice Pack Reserve Case ($60)

Mophie Juice Pack Reserve Case
  • Capacity – 1,840mAh
  • Output – 1A
  • Size – 5.9 x 2.76 x 0.58 inches
  • Weight – 75g (2.65oz)

As one of the original iPhone battery case brands, Mophie is a trusted name. While the Reserve is at the lower end of its offerings in terms of power, it still delivers an extra 60 percent of battery life within one of the slimmest and lightest frames the company has ever produced. There’s a power button on the back and four LEDs to show how much juice is left.

The case comes in two pieces for a simple fit that are easy to hold and slide together. There are button covers, openings for the switch and ports, and design components that redirect the speaker to the front. It charges via micro USB, and it will charge your iPhone first when you plug it in.

Moreover, you don’t need to worry about drops with this case on because it features raised corners and support pads inside, which enable it to meet military drop test standard 810G. This case flaunts decent protection, extra power, and a slim form factor that’s available in five understated colors.

Amazon  Mophie Best Buy

Editors' Recommendations