TL;DR – These are the Greatest Smartphone Battery Instances:
1. Alpatronix BXXI Professional Battery Case
Greatest iPhone 11 Professional Battery Case
Alpatronix BXXI Professional Battery Case
Capability: 4,200mAh ● Dimension: 6.2″ x 3″ x 0.6″ ● Weight: 249g
The iPhone 11 Professional (read our review) has some noticeably longer battery life, but it never hurts to pile on even more. This 4,200mAh battery case promises to keep your iPhone 11 Pro topped off for a full 24 hours to get through an entire day. It’s also Qi compatible, so you can wirelessly recharge your device without having to remove the case.
2. Apple Smart Battery case for iPhone 11 Pro
The official iPhone 11 Pro battery case
Apple Smart Battery Case for iPhone 11 Pro
Capacity: ~1,500mAh ● Size: 7″ x 3.7″ x 0.9″ ● Weight: 204g
If you want a case that’s guaranteed to work perfectly with your iPhone 11 Pro, then you may want to pick up the Apple Smart Battery Case. It doesn’t have the largest capacity, but it’s guaranteed to work with your iPhone and allows for wireless charging. It can even display its charge status on the lock screen of your iPhone. As an extra feature, it adds a dedicated camera shutter button for your phone.
3. Euhan Battery Case For iPhone 11 Pro Max
Best iPhone 11 Pro Max Battery Case
Capacity: 6,500mAh ● Size: 6.7″ x 1.6″ x 3.1″ ● Weight: 68g
If you want to affordably add a beefy battery to your iPhone 11 Pro Max, this case will do it. It offers a 6,500mAh battery that can recharge your handset more than once. Handy LED indicator lights will also let you know how much charge the battery has left. And, of course, it adds an extra bit of protection for the back and sides of your device.
4. Mophie Juice Pack Access
Fully Wireless iPhone 11 Pro Max Battery Case
Capacity: 2,200mAh ● Size: 6.36″ x 3.22″ x 0.74″ ● Weight: 113g
The Mophie Juice Pack Access adds a handy bit of extra juice for your iPhone 11 Pro Max with 2,200mAh of capacity. What makes this case even better is it charges the phone wirelessly, which leaves your Lightning port free to connect for data transfers or audio connections. It also features a hard, polycarbonate shell to keep your iPhone protected.
5. Newdery iPhone 11 Wireless Charging Battery Case
Best iPhone 11 Battery Case
Capacity: 5,000mAh ● Weight: 100g
Packed with a fat 5,000mAh battery, the Newdery Wireless Charging Battery Case is an excellent battery case for iPhone 11 users. You can charge the case and phone together with a Lightning cable.
Another bonus of this case is it also has wireless charging built-in, so it’ll work with all the Qi wireless charging pads you’ve already own. Despite the way this case giving essentially gives your iPhone 11 a second battery, it’s still surprisingly slim.
6. Anerai Battery Case for Samsung Galaxy S20 Plus
Best Samsung Galaxy S20 Plus Case
Anerai Battery Case
Capacity: 7,000mAh ● Size: 7.9″ x 3.9″ x 1″ ● Weight: 164g
You don’t have to worry about running out of juice on your new Samsung Galaxy S20 Plus with the Anerai Battery Case. Thanks to its 7,000mAh capacity, this case it ready to more than double the battery life of the Galaxy S20 Plus. It attaches to your phone simply, as you can just slide your phone down into it. On top of charging your phone directly in the case, the USB port can be used to charge another mobile device over a USB cable. So, with this case, you won’t have to worry about running on a 5G network draining your battery too quickly.
7. Newedery Google Pixel 4 Battery Case
Best Google Pixel 4 Battery Case
Capacity: 5,000mAh ● Charging Time: 2.1 hours ● Recharging Time: 3.8 hours ● Size: 6.4″ x 3.1″ x 0.7″ ● Weight: 84g
You’ll be able to keep taking pictures with your Google Pixel 4 (read our review) for a long time with the Newdery Battery Case. It offers up 5,000mAh of extra juice, which is more than enough to completely refill the phone’s battery. It’s made with a combination of soft and hard materials, making it easy to insert your phone while also protecting your device from all sides.
8. Newdery LG G8 ThinQ Battery Case
Best LG G8 Battery Case
Newdery LG G8 ThinQ Battery Case
Capacity: 4,700mAh ● Charging Time: 2 hours ● Size: 6.19″ x 3.04″ x 0.77″ ● Weight: 123g
The LG G8 ThinQ has plenty of battery to power it, but if you’re into some serious gaming or want to be sure you can enjoy videos with the brightness and HDR enhancements peaked, you might need some extra power. The Newdery Battery Case is designed to more than double the power for the LG G8 ThinQ, and can even fully charge the phone in about two hours. It fits around the outside of your LG G8, and you don’t need to remove it when you’re plugging back into a wall outlet. The case can protect you from a dead battery, but also protects the phone’s back and sides from falls.
What to Look for in a Battery Case
You might think picking the right battery case for your phone is just a matter of picking the one with the biggest capacity, but that’s a surefire way of buying something too big to fit in your pocket and end up leaving at home all the time. Choosing the right charging case comes down to hitting the right balance between battery capacity, size, and price.
If you’re looking for just a battery case to throw in your bag when you need it, you might as well get a portable charger. There’s no point in buying something molded to fit your phone if you’re never going to slip it inside of the charging case, which just leaves space that otherwise could have been used to fit more energy cells. With that in mind find a battery case that’ll actually fit into your pocket without adding too much weight.
Another problem with choosing the highest capacity battery is that it’s often its only feature. All of the highest capacity battery cases we’ve seen sacrifice quick charging and Qi charging capabilities for storing more energy. That latter feature is important if you like to keep the charging chase on your phone at all times and handy for wirelessly charging both your phone and battery case at the same time.
Mark Knapp is a regular contributor to IGN and an irregular Tweeter on Twitter @Techn0Mark