The 3 Best Battery Cases for iPhone 6 and 6 Plus of 2020

Never get stuck with a dead phone battery again

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The Rundown
"The Alpatronix is a slim iPhone 6s battery case that provides plenty of extra juice for your aging phone."
Best Thin Case:
Incipio offGRID at Amazon
"This ultra-thin battery case barely adds any bulk at all but still packs a full additional charge."
Best Battery Capacity:
Pxwaxpy Battery Case at Amazon
"This case has the biggest battery boost we found with a huge 8500mAh that provides a number of full charges."

The best battery cases for the iPhone 6 and 6 Plus should offer lots of extra juice, not interfere with other features, and provide protection.With the iPhone 6 and 6 Plus starting to show their age, a battery case is a good way to give an old, worn out phone a new lease on life. Our top pick with these features is the Alpatronix iPhone 6S/6 Battery Case at Amazon. It offers a large cell, added protection for the body and screen, and is MFi certified to ensure it works with all Apple functionality.

If you're finally ready to upgrade, you should browse our list of the best smartphones to pick from the best Apple and Android devices. Read on below to see our list of the best battery cases for the iPhone 6 and 6 Plus.

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Best Overall: Alpatronix iPhone 6S/6 Battery Case

The Alpatronix iPhone 6S/6 battery case is one of the few remaining battery extender options for owners who are still holding onto their old iPhones. The case gives you a 3,100mAh battery, passthrough charging and syncing, and plenty of protection from drops and scratches. The charger is MFi certified, meaning it doesn't restrict any iPhone functionality like the camera or Apple Pay.

Beyond that, the case has several LED lights to indicate how much power it has, a raised bezel and scratch guard to protect your screen, and it can give you an extra 12 hours of talk time or four hours of intensive usage, which should be more than enough for a full day.

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Best Thin Case: Incipio offGRID Battery Case for iPhone 6/6S

If you’re into the idea of using a battery case but really want to avoid adding any extra bulk or changing your iPhone’s slim, stylish lines, the Incipio offGRID battery case for the iPhone 6 or iPhone 6S is a good choice. The ultra-thin battery case barely adds any bulk at all, and certainly not more than many other normal, non-charging protective phone cases. Despite its svelteness, this case conceals a rechargeable lithium-polymer battery fully-loaded with 3000mAh of power that provides up to 17 hours of additional talk time plus more than double the text, stream, and surf time too. Choose from black, white, coral pink, or violet to customize your look. Putting the case on your phone is literally a snap thanks to the user-friendly slim snap-on bumper. Plus, you can sync and charge simultaneously with the included cable. At less than $50, this discreet case won’t break the bank either. 

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Best Battery Capacity: Pxwaxpy Battery Case for iPhone 6S Plus/6Plus

If you really want to take your phone’s battery life to new heights, the Pxwaxpy iPhone 6S Plus/6 Plus battery case has the biggest battery boost we found. Despite its slim profile, this battery case boasts a huge 8500mAh rechargeable battery that provides up to 17 extra hours of talk time, 60 hours of music time, and 13 hours of video playback time. Like many of the other phone battery cases on our list, this case allows you to sync and charge without taking it off your phone.

It's also very easy to use — simply slide your phone into the battery case, and press the "ON" button at the bottom for three seconds to begin charging your phone. You can also use traditional lightning accessories and headphones with this convenient battery pack, and it protects your cell phone from scratches, dings, and other daily wear-and-tear. The Pxwaxpy Battery Case comes with a 12-month warranty and a 30-day hassle-free return service.

Final Verdict

The best battery case for the iPhone 6 and 6 Plus is the Alpatronix iPhone 6S/6 Battery Case (view at Amazon). It has a 3,100mAh cell, offers plenty of protection, and doesn't interfere with functions like syncing and charging. For a thinner case from a better known brand, we like the Incipio offGrid Battery case (view at Amazon). It has a 3,000mAh cell so it's only slightly smaller, and has an easy snap-on bumper for easy installation.