ZEROLEMON Battery Case for Galaxy S21 Ultra, 8000mAh Fast Charging & Wireless Charging Supported, Ultra Power Extended Battery Charger Protective Case for Galaxy S21 Ultra 5G - Black

I have used and reviewed ZeroLemon battery cases may times for many different devices. Right now I’m going to tell you my thoughts on their Samsung S21 Ultra 8000mAh Battery Case.To start off I want to say that ZeroLemon in general sells top quality products for very reasonable prices. Like all other cases I have bought from ZL, it came in a resalable package which I like because when not in use you can store the case in there instead of just leaving it collecting dust.First I stared using this case when my phone was fully dead. Once I pressed the power button, I was surprised how quickly my phone went to 100%. My estimated time for this full charge was about an hour, after turning it back on some moments later. The case itself to fully charge took about two hours, which is great.PROS:-Mobile Pay Friendly - Samsung Pay worked perfectly multiple times without having to take the case off.-Wireless Charging support.-More than doubles the phones original battery life.-Android-Auto, Samsung Dex, and Computer File Transfer support had no issues-Decently priced especially for what you’re getting-Phone speakers were not affected by the case-The lower battery portion of the case looks like it can take some abuse.-AirCusion Corners – This is a BIG Pro yet a very minor-con because I am paranoid about dropping my phone (I explain more below)As with everything in life, there are cons. Luckily, this case has very few cons and for me none that I mention are deal breakers that would prevent me buying this case.-“MORE PRO THAN CON” - I understand the top of the case need to be bendy to be able to install the case. The trade–off for this is that there’s USUALLY there's very little drop protection. HOWEVER, unlike my other ZL battery cases; this one has ZeroLemon’s “AirCushion Corners.” I’m sure they provide some extra protection if dropped corner first. As I just got this phone I have not done any drop tests. Just knowing that they are there puts me a little more at ease just in case I accidently drop my phone. My hope is that it would provide just enough cushioning to prevent any cracks. That being said even while using a heavy duty case, I'm always worried any drop will cause a crack.CONS:-“CON-ish” - The case is very bulky, BUT that is to be expected with any battery case.-Sometimes the case gets a little hot which I don’t mind right now since its very cold outside, but during the summer I can see having the phone/case on your pocket could be kind of uncomfortable.In conclusion, even with the very few cons i mentioned, I love ZeroLemon’s products and this battery case. Personally for me I would not use this as an “Everyday Case.” I’m extremely clumsy and drop my phone all the time; phones are too expensive to take the risk. This case is PERFECT for when you know ahead of time that you won’t have any access to a charger; times like when you’re going to be out all day running errands or out at night. I especially like taking my case with me when I go on vacations as you never know what can happen and having that extra battery power could mean the world. And as always, this battery cases gives you the ability to not have to carry around a bulky battery pack and extra charging cord which can be annoying.I will always recommend Zerolemon when you’re in the market for a battery case. So obviously this case is no different. My overall opinion is that this case is a DEFINITE BUY!!!!

First and foremost, this case is around an inch thick below the camera coverage, and provides quite a bit ofthickness to an overall thin S21 Ultra footprint. It's not too slick of a finish and has a good feel which aids in not dropping the phone etc... It has raised corners and seems to play nice with my screen protector. It does not allow you to use the edge lighting and is wireless charging friendly through all of my testing.I also did not have any issues with Samsung or Google Pay so far...That being said, this obviously is not your every day case for the average consumer. This will be your go on vacation case...your camping or car show case for taking lots of pictures and video...The only real issue I have with this case so far, other than the heft, is that it does seem to be pretty slow to charge. Maybe that's just me but my past experiences with ZeroLemon cases seemed faster.Overall this is an excellent battery case and I think it lives up to the quality we have become accustom to from ZeroLemon.

So I was pretty excited about this item as I've purchased Zero Lemon items previously and had great experiences. However, this fell very short. It worked for about 12 hours but after that it stopped charging the phone and stopped charging itself when plugged-into the adapter. In fact it got so hot it burned a piece of paper it was sitting on and peeled-up the protective plastic on the face of the phone! It was scalding and that's too dangerous to use. There was no damage to the item, it just quit. Also, I noticed that the plug does not work with plug-in items such as my glucose meter which is designed for USB-C ports and works fine on the phone without this case on it. That's pretty bad if I have to constantly take the case off to use a simple plug-in accessory. Compatibility is important and in this case, woefully missing.

I honestly wasn't sure about this because the brand name "ZEROLEMON" sounds like some cheap brand ripoff. But I gave it a try anyway because of the positive reviews, and I was pleasantly surprised.I let my phone get down to 25%, then press the button on the back and charge it up to 85%. Then I let it go to 25% again, and it'll usually charge it up to 65-85 depending on how much is left in the bank. This can get me through 48 straight hours without having to touch a charger. Phenomenal.I've also dropped my phone several times, and there's been no damage to it each time. So the case is also pulling its weight in protecting my device, too.It surprisingly makes my device a little easier to hold, too. Because I can wrap my fingers around the lip underneath the camera bump. It is a little heavy, so sometimes I have to change my grip, but it doesn't bother me that much. Overall, I'm really glad I gave this thing a shot.

I purchased the case for my s21 ultra, it fits very nicely. Does add some weight to the phone but completely understandable. Unfortunately the case does not perform as advertised. It will not allow the phone to fast charge and will not accept any 25w or 18w block. I contacted support and the sent me another one after I sent my old one back, but it had the exact same issue. They claim it allows pass through fast charging but it does not. The only thing that does work is wireless charging which is still not fast as it goes through the case. At 10% expect your phone to take 2-3hours without use to fully charge " not including the case". Hopefully they fix the issue. I believe it is due to the battery pack not fast charging the phone so some connection is limiting the charging. Overall a good case it works allows you to charge your phone anytime and keep it powered. But the lack of fast charging is very sad. Fitment is great. Does block some of the screen and some screen protectors don't like it.Update- after some effort the case will fast charge. It seems to like cheaper cables. I had a high rating cable but it never worked with the case on. I recently bought a cheap one and now I can fast charge the phone in the case. So if you are having issues try a cheaper cable, weird I know but it works.