Skip to content

Best Battery Case for Samsung Galaxy S21

December 27, 2020

The Galaxy S21 is easily one of the most anticipated smartphones in the past couple of years, so, rumors regarding its release date, specs, and accompanying accessories are running wild. While we’re waiting for it to finally hit the shelves of markets both physical and virtual it may be a good idea to start looking for a solid battery case to complement its functionalities. We have a couple of suggestions for you:

I-Blades Galaxy Smart Case


Let’s start our review of the best battery cases for Samsung Galaxy S21 with the ultimate model –  the i-Blades S30 Galaxy Smart Case. Essentially, this is the most versatile smart case that combines the elements of an SD card, a memory case, and battery boosters in a small, portable package.

This model is outfitted with a top-shelf battery that will add extra 20 hours of battery life to your phone. Furthermore, it is outfitted with a built-in SD card for additional storage; you will be able to choose between various storage options in the range of 16 gigabytes to 128 gigabytes and more.

The I-Blades Galaxy Smart Case is also a top-shelf screen protector; it packs a custom-built screen shield that is substantially stronger than most dedicated screen protectors that are typically manufactured of different versions of Gorilla Glass.

Overall, this is the best-rounded Battery Case for Samsung Galaxy S21, but we should also mention that it’s also a bit more expensive than other models on our list.


  • Made from exceptionally sturdy materials
  • Equipped with a strong battery that can yield up to 20 extra battery hours
  • Expands your phone’s storage up to 128 gigabytes
  • Top-quality screen protector


  • Slightly more expensive than other models on our list

Take your phone experience to the next level with i-Blades today!

Zagg Mophie Juice Pack


Our runner-up pick is Zagg’s Mohpie Juice Pack. Basically, this is an iPhone battery case by design, but it features elongated edges so that it can fit on the Galaxy S21 as well.

First and foremost, this battery case is incredibly light; equipping it to your Galaxy S21 won’t change how it feels and its weight considerably, but it will enhance its battery lifespan nearly twice as much in turn.

The rubberized pads on the edges add an extra layer of protection to your smartphone’s screen, but more importantly, these pads help the phone feel a bit less ’edgy’ and slightly more comfortable in terms of storage.

Zagg’s Mophie Juice Pack is outfitted with a 2,420 mAh battery that is capable of providing an extra 60% charge to your phone. You will be able to easily check the status of the Juice Pack by taking a peek at the LED-lit indicator located at its back.

One of the best things about this battery case is the fact that it offers fast-charging functionalities, much like the S21 itself, as opposed to offering more battery lifetime at the expense of longer recharge times.

In a nutshell, the Mophie Juice Pack is relatively cheap, it charges rapidly and boasts the CFT technology, which eliminates the risk of overheating & overcharging. However, the i-Blades model offers substantially more battery charge while being capable of faster recharge, which is Mophie’s only shortcoming.


  • Decently affordable
  • Lightweight construction
  • Rubberized edges for extra protection
  • Wireless recharge technology


  • Provides slightly less battery boost in comparison to i-Blades model

Newdery Galaxy Battery Case


Here we are looking at Newdery’s Galaxy Battery case, which is an excellent option for people who are looking for a budget S21 bat case model. It’s incredibly sturdy and offers enough juice to double the current amount of your phone’s battery, and to top it all off, it’s outfitted with a variety of top-shelf technologies and utility features.

First and foremost, Newdery’s case is constructed of ultra-robust TPU material. It is safe to say that this model will reinforce your phone’s durability with extra impact and shock protection, keeping the hardware safer from physical damages.

One of the most important features of this smartphone battery case is the integrated Li-Po 5200 mAh battery. Again, it’s potent enough to upgrade your phone’s current battery life with an additional full charge.

This case also features a raised bezel, which helps to keep the display protected at all times. Additional utility features include short-circuit, overheat & overcharge protection.


  • Excellent durability
  • Equipped with a built-in 5200 mAh battery
  • Features overheat, short-circuit & overcharge protection
  • Raised bezel


  • Slightly heavier than similar products

Aedlyk Battery Case


Even though Aedlyk’s battery case is the cheapest model on our list of the best battery cases for Samsung Galaxy S21, it’s stronger and more versatile than most similarly priced models in this category.

In essence, this is an iPhone battery case that is compatible with most 5G smartphones, including several Samsung Galaxies. It packs a highly durable construction, a super-strong 4000 mAh battery, and a neat LED indicator that shows how much battery life is left in the case and on your phone.

First and foremost, the built-in battery in this case is strong enough to almost double your phone’s initially battery life. It’s capable of enhancing its longevity by 150%.

Another cool feature of this smart case is the advanced sync technology. Essentially, it provides you with the ability to charge and use your phone (with the case equipped) from your PC without interrupting the charge time and efficiency. Other notable features include the 360-degree scratch guard and the integrated screen protector, which will considerably boost your phone’s overall sturdiness.


  • Fairly cheap
  • 360-degree scratch guard
  • Built-in 4000 mAh battery
  • Advanced synchronization technology


  • The LED indicator is a bit too bright


The S21 is an incredible smartphone. It boasts 5G connectivity, exceptionally sturdy HDR10+ display, some of the finest specs available including the brand-new Qualcomm’s Snap Dragon 888, an astonishing 108 megapixels in its main quad-lens camera. However, its battery lifespan may not be sufficient for all the fun you’ll want to have with it. That’s why we warmly recommend checking out our selection of the most popular battery cases for Samsung Galaxy S21.