Best Replacement Battery for Galaxy S8 2023 – Our Two Cents

Is it possible to replace a Samsung Galaxy S8 battery? You might be wondering. Well, the good news is that there’s a simple way to do it. You don’t need to pay a hefty price to your phone repair company, either.

You only need to buy a well-made spare battery – preferably one that:

  • Is quality-tested
  • Well-priced
  • Protected by a warranty
Best Replacement Battery for Galaxy S8

Replacement Battery for Galaxy S8 – Comparison

We kick off the reviews with a quick, simple chart. Afterward, we accompany each product with a detailed and unbiased review.

RankingProduct NameWarrantyCapacity
1MaxBear Galaxy S8 Battery12 Month3700mAh
2SHENMZ Galaxy S8
3HDCKU Galaxy S8 Replacement Battery12 Month3000mAh
4Wake Samsung Galaxy S8 Replacement Battery24 month3000 mAh
5Qmax Samsung S8+ Replacement Battery3500mAh

1. MaxBear Galaxy S8 Battery

Compatible with all S8 SM-G950 EB-BG950ABE Samsung Galaxy S8s, this battery from MaxBear brand is quite versatile. It is also easy to replace thanks to the free tools it comes with. Therefore, nearly any person should be in a position to do the replacement.

In addition, the battery packs 3000mAh capacity to ensure you get the most time possible out of every charge.

As if that’s not enough, each comes with a unique chip to protect your Galaxy S8 from overheating and short-circuit. The chip also prevents the phone from overcharging or even over-discharging.


  • One-year warranty guarantee
  • Replacement is straightforward
  • Works as advertised
  • Fast delivery and great customer service


  • Not easy to disassemble the phone without breaking its back glass-cover

2. SHENMZ Galaxy S8 Replacement Battery

With 3600mAh capacity and 3.85 voltage, you can expect up to 500 charge cycles and efficient charging. Therefore, apart from using it as a replacement battery, you can keep it on hand as a spare battery.

Additionally, the unit is crafted of premium A battery cell and manufactured under strict control standards to ensure quality. In fact, it’s both ROHS and CE certified so you can bet on it to provide you with long-lasting performance.

What’s more? It boasts a built-in fail-proof chip that offers protection against short circuit problems, overcharging, over current and over discharge.


  • High-speed charging
  • Backed by 18 months warranty and 30-days free return guarantee
  • Built to last 
  • Easy to swap the battery


  • Compatible with just a few selected Galaxy S8 models

3. HDCKU Galaxy S8 Replacement Battery

Tired of your old Samsung battery that keeps running low every few hours? The HDCKU replacement might be the replacement you need.

Designed for Verizon, T-Mobile, AT&T, Virgin Mobile, Cricket, MetroPCS and Boost carriers, the battery is a popular bet on the market. The fact that it supports a long list of carriers makes it highly usable.

In addition, it comes with a handy installation kit. This kit comprises adhesive strips and covers. In other words, you get everything you’d need to complete the installation process in one package.

And the icing on the cake – the HDCKU comes with a detailed user manual. The manual comprises detailed pictures and schemata. These come in handy in simplifying the installation process.

Another good thing with this unit is that it’s protected by a 12-month warranty. Best of all, this warranty is further backed by a great customer support team.


  • Great customer service
  • Detailed installation instructions
  • Complete installation kit
  • Great battery life (3000mAh)


  • A bit pricey

4. Wake Samsung Galaxy S8 Replacement Battery #SM-G950

Wake is a renowned manufacturer of Samsung replacement batteries. For that reason, we’d like to say that their under $10 battery seems like a great bargain.

The battery packs 3000 mAh worth of power. That’s just enough to run you on a single charge per day. It may, however, not be any better than the OEM battery that S8s come with.

To make sure you never have to settle for less, the company provides a 24-month warranty. Yup, you’ve read that right.

The SM-G950 replacement battery from Wake is protected by an iron-clad warranty. That goes a long way to show you just how reliable this brand is.


  • Durable design
  • Built-in chip to prevent overcharging
  • 2-year warranty
  • Affordably priced


  • Its standby time could have been better

5. Qmax Samsung S8+ Replacement Battery

This Samsung S8 replacement battery is known for its affordability and overall great design. Indeed, it comes with a built-in microchip.

The chip comes in handy in preventing overheating and overcharging. That alone goes a long way in lengthening your battery’s life.

On top of that, this is a Lithium-Ion battery which means it’s relatively good at storing power.

For sure, it comes with a 3500mAh power capacity. As long as the battery is new, it can comfortably run you for 24 hours.

In fact, it can last longer than that if used for basic stuff like calling and sending SMS messages. So, overall, this seems like a good battery although its life is limited to around 12 months.


  • Awesome standby time
  • Great bargain
  • Secured against overcharging and overheating


  • No clear details on warranty
  • Offers limited network parameters

Guide on How to Replace the Original Galaxy S8 Battery

As you embark on replacing the worn-out battery, there are several things that you should take note of. For instance, the battery should not have a charge of more than 25% as it would be at a higher risk of exploding or catching fire in case of an accidental puncture.

Another thing you should watch out for is whether the battery is swollen. Such a battery can be quite dangerous, and before you know it, it could explode right before your eyes.

Therefore, we advise that you ensure your eyes are always protected. It would also be wise that you consult a professional if you get confused the slightest bit.

With that in mind, let’s now head into how you can safely replace the worn out battery with a new one.

The required tools

Some tools would make everything easier for you, and they include a suction handle, a screwdriver, a spudger, and an iOpener.

Step 1: Heat the iOpener

Before you place the iOpener in the microwave for heating, you need to ensure that it is clean so that nothing sticks on the tool.

Also, confirm that the plate is spinning freely so that the opener does not get stuck.

With all this confirmed, proceed and heat the opener for around thirty seconds. An ideal opener should remain warm for about ten minutes during use, and should it cool down, always reheat it in the microwave for thirty seconds.

Step 2: Disassembly of the Back Cover

Once you remove the opener from the microwave, go ahead and apply it on a long edge of the smartphone. This should take place for about two minutes.

It is important to have replacement adhesives nearby to ensure that your S8 is not exposed to liquids once it is open.

Step 3: Use of the Suction Cup

In this part, you apply the suction cup close to the heated edge and then lift it. As you do the lifting, insert a spudger under the rear glass.

Step 4: Softening the adhesive

Use the spudger to separate the adhesive by sliding it down the side of the phone. You should reheat and reapply the iOpener as frequently as possible to ensure the cutting remains easier.

Always be keen to leave an opening pick on each side so that the adhesive does not reseal.

Step 5: The fingerprint sensor

This sensor uses a cable to connect the phone tom the rear glass, and you should ensure that it also disconnects as you remove the back glass.

In case it gets stuck during the removal, make use of the spudger to ensure total disconnection.

You should now be able to remove the glass cover entirely

Step 6: Installing a new back cover

You should ensure that no adhesives are remaining on the phone’s chassis from the old cover. Use isopropyl alcohol to clean the adhesion areas to be ready for the new adhesive.

Now, peel the adhesive backing from the new rear glass before lining up one edge of the glass against the phone’s chassis. You should end by pressing the glass against the phone.

Step 7: Removing the NFC antenna

You should also be careful as you remove the NFC antenna, the charging coil assembly, the loudspeaker assembly, and the battery connector.

Step 8: Removing the old battery

Once more, reheat the iOpener and apply it directly to the battery. Allow this to happen for around two minutes as the adhesive weakens.

Then, pry the battery from the bottom by use of an opening pick. You may have to slide this pick up the side of the battery to cut through any remnants of the adhesive.

Finalize by lifting the battery out of the case.

Step 9: Reassembly

To reassemble your device, reapply the adhesive and then follow the above instructions in reverse. You should be good to go.

Replacement Battery for Galaxy S8 – Buying Guide

If you’re looking for the details on Galaxy S8 battery replacement cost, we hope this buying guide will be of help. First off, we can estimate that as much as you’re willing to follow a few simple steps, the battery replacement process is pretty much a DIY one.

So, you can spend in the range of $10 – $20 for a replacement battery. Usually, these replacements come with an installation kit.

The kit can also be found alongside the user manual. If the user manual isn’t available, you can always find some helpful installation videos online.

Some of the factors to consider when shopping for a replacement battery include.


Always go for a well-made battery. Ideally, you should only go for one that’s well-made and duly certified by the like of FCC, CE, and ROHS.


It’s important to find a unit with the right warranty terms. We’d recommend settling for nothing short of a 1-year warranty at the very least.


Go for a battery that provides you with an installation kit and a user manual. Note: if you’re already familiar with the installation process and have the tools already, you can save a few bucks. Replacement tools without the extras are normally cheaper than ones with them.

Which One Is The Best?

Overall, we think the Maxbear 3000mAh Lithium Polymer battery is the best one for S8 devices. It’s reasonably priced and comes with a full installation kit. It’s also backed by numerous, positive user reviews. That’s in addition to the fact that it packs a 12-month warranty.

Final Thoughts

Don’t compromise. The truth of the matter is that you can always find a high-quality replacement battery for your S8. While at it, we hope that the buying guide provided above will be of great help.

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One Comment

  1. Steve Jako says:

    Why didn’t you test the 4220 mah batteries I see 4 sale on ebay?

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