ZeroLemon 6300mAh Battery Case for Samsung Galaxy S8 review

ZeroLemon is back with battery banks, but this time it is for the Galaxy S8 and Galaxy S8+. If you are looking for sexy and sleek design, do not look for it here. If you are looking for something that can protect your phone during a mishap, or if you have small hands, keep on looking. However, if you are looking to add some extra juice to your phone, then come on in and enjoy. This thing does its job though, just do not expect it to look pretty and be ready to be mocked by people when they see it.


Per usual with ZeroLemon items, it comes in a non-frilly, no gimmicks, and straight-to-the-product package. The package is a white plastic bag with a resealable top with the ZeroLemon logo in the front and the back. It also shows some directions on how to use the item and maintenance. And inside is a box holding the battery pack, a case, booklet, a warranty card, the booklet manual, and a headphone jack extension. As I said, no frills and no gimmicks… just straight to the product.

The extended battery itself looks like any normal battery that is connected to a USB-C output plug with a power button on the back with four LEDs. In the front of the battery pack are speaker grill holes since the Galaxy S8 phones have the speaker on the bottom. This is like Voltron where you combine different parts to build one giant battery pack case. Since the grill of the battery pack is located below the phone, it adds quite a bit of space where your headphone jack would go. That is where the headphone jack extension comes in and makes the phones jack accessible for you to use.

When you take the battery pack case out, you will see that it is thick and pretty lightweight for something that big. The case is a rubber plastic combo that houses the battery pack and your phone. Behind the case is a power button that looks like the one behind the battery pack but four holes for the LEDs to shine through.


I received the case with only two LEDs turned on, meaning it only has half a tank. ZeroLemon’s website says that it takes six to seven hours to charge the extended battery fully. So I let it charge overnight, and that did the job. I used this during the week and got a good two and a half days of phone use with just the battery pack used as a charger. So it does a really good job of keeping your phone on. My week usually consists of getting work and personal emails on my phone, receiving texts, streaming Spotify on the drive to and from work, and of course, streaming Crunchyroll during my break. Afterward, I use the phone for at least an hour at the gym.

With my day starting at 7 a.m. and ending around 9:30 p.m., I pretty much use up to half the battery pack’s life. Usually, by the end of the day, my phone would be close to ten percent left and would be connected to a wall charger the rest of the night. Thanks to this though, that was not the case. I was able to keep my battery up around 40% to 55%. And when I call it a day, I let the battery pack do its job and charge my phone overnight. From what I can tell, it has an automatic shut off once your phone has 100% after a minute or two. I always wake up between 90% to 97% charge every morning.

I had a similar amount of battery life time on my phone during the weekend. I just used the battery pack as a charger and my phone lasted the whole weekend without having to be plugged into the wall. I have not noticed it running hot while I have had this phone. I know some battery packs will run hot while charging, but this was not the case.

This pretty much triples you phone thickness. So if you are looking to use this case and wear skinny jeans, good luck. Seriously, this case is not meant to keep its sleek and thin look. It is meant to keep the phone running for longer than battery charge has. And since it does a great job charging, I cannot fault it too much for that. Another downside to this case is there is no protection for your front glass. So if it falls and lands face first, consider it cracked. The case is just a hair’s thickness too short and the front glass sticks out. So be very careful when handling the phone since this is not for a person who has small hands.

Final Reaction

This ZeroLemon case is for anyone looking to have a battery pack connected to their phones at all times without having to bring a cable or go through their backpacks or purse looking for a battery pack. And you have to be willing to carry around a bulky phone.

If you have any questions or are interested in the item. Visit the ZeroLemon site here.

Rating: 4.5/5 Atoms

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Jose Gutierrez III
Jose Gutierrez III 694 posts

Jose Gutierrez III is an IT tech by day and nerd by night.


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