How to Replace Battery in Galaxy S7 – Detailed Manual

As part of the top and high-performance phone, Samsung Galaxy S7 (known under the codenames G930, G930F, and G930FD Dual) uses a battery capacity of 3000 mAh with a working time of about a day and a half. If the device begins to work for less than a day, shows jumps in the percentage of charge level, or turns off unexpectedly, then its battery needs to be replaced. In this repair guide, we will show you how to replace battery in Galaxy S7 smartphone.

This repair can help if your smartphone quickly runs out of power during heavy use, you can no longer charge or turn on your phone, or the battery life has expired.

Battery Replacement in Galaxy S7

Be sure to turn off your Galaxy S7 and remove the SIM card before starting the repair. It is important to be careful when replacing because careless damage to internal elements can require costly repairs.

Step 1

For the repair you will need the next repair tools:

  • A battery
  • Screwdriver set
  • Mediator
  • Spatula
  • Tweezers
  • FLUX-OFF liquid soiling remover
  • Clamps
  • Glue for gluing B-7000

Step 2

Apply FLUX-OFF liquid (or 50/50 mixture of isopropanol and gasoline) around the perimeter of the back cover to soften the inner glue. The procedure may have to be repeated several times.

How to Replace Battery in Galaxy S7 - Ultimate Guide for Users

The first thing you need to do is remove the back cover. The glass back cover is glued to the frame of the Samsung Galaxy S7. Use a suction cup to pull the back cover-up. Warm the device in advance with hot air from a hairdryer. This way the glue will soften and it will be easier to open the back cover.

Once you have a hole between the back cover and the housing, insert a plastic pick there. Insert the next pick on the other side of the phone. Use more plectrums to open each side of the smartphone. Circle the pick around the perimeter of the phone, so the back cover will peel away from the frame. Now carefully remove any glue residue from the inside of the case and back cover.

Step 3

Next, unscrew the 12 screws that secure the antenna cables and speaker to the case, and remove the yellow tape.

Step 4

Now disconnect the top antenna from the case. Start at the upper right corner. Once the antenna cable is disconnected from the right side, gently pull it in the middle so that the left side comes off as well.

Step 5

Remove the antenna completely.

Step 6

Next, remove the middle antenna from the housing. Note that it is connected to the lower antenna.

Step 7

Now use tweezers to disconnect the speaker starting from the left side.

Step 8

Next, using a plastic spudger, carefully disconnect the battery contact from the motherboard.

Step 9

Using a plastic spatula, carefully disconnect the front camera contact from the motherboard. And remove the front camera from the housing.

Step 10

Using a spudger, carefully disconnect the marked pins from the motherboard.

Step 11

Remove the motherboard. The bottom of the motherboard (arrow) is connected to the USB port. Gently tilt the board 180° so that you can reach the contact. Do not pull on the board too hard. Using a plastic spudger, gently detach the contact from the board. Now remove the motherboard completely. There is a small plastic pin in the hole of the SIM card tray. Make sure that it does not fall out.

Step 12

Now you need to remove the old battery. Be very careful at this stage. Use a flat, blunt tool, such as the rounded end of a metal spatula, to avoid damaging the battery. The battery is glued to the case. Use the tool to gently detach the battery from the housing. First, disconnect the battery from one side, then the other. Then carefully insert the tool under the battery and remove the adhesive underneath. Remove the battery from the housing.

Installing the New Battery and Reassembling the Samsung Galaxy S7

Now install the new battery into the Galaxy S7 case, pressing the battery down so the glue sticks better.


  • Turn the rear housing over and place it in the bottom edge of the case to reconnect the USB port pin. Make the connection until you hear a “click” sound. Lower the board to reinsert it into the case.
  • Connect the marked pins to the motherboard.
  • Place the front camera into the recess at the top corner of the case. Connect the camera to the motherboard. You should hear a “click” when the connector locks into place.
  • Connect the battery to the motherboard. Slide the battery connector into the motherboard until it clicks into place.
  • Place the speaker at the bottom of the case. Press the speaker with your fingers until it clicks into place in the case.
  • Place the middle antenna back in the case and secure it to the bottom antenna. Press the antenna with your fingers until it clicks into place.
  • Next, install the upper antenna starting on the left side. Press it against the housing with your fingers until it clicks into place.
  • Now glue the yellow sticker back on and tighten the 12 screws.

Replace the back cover in its original position. Press the back cover all the way around so that the glue sticks well. You can also heat Galaxy S7 with hot air and then clamp or weight it with a couple of books to make the glue stick better. By the way, galaxy s7 safe mode is a special environment for the Android operating system without loading any user-installed apps.

How to Charge Galaxy S7 Properly

After all, it is logical that most of us do not charge our new phones every day, and we do not always manage to spend a full cycle. Few people usually discharge the battery strictly to zero, not to mention the fact that very often it is necessary to take the smartphone off the charger before it is 100% charged.

All this increases the life of the battery, so that it will live for a year and a half, or even two years without replacement.

Don’t get us wrong: you don’t have to go crazy. We never, ever recommend that anyone follow the 20-80 principle. Its essence is to discharge your new phone to no less than 20% and charge it to no more than 80.

In this case, you are deliberately depriving yourself of about a third of the battery life of your device, which is completely impractical. So charge your smartphone the way you want and don’t bother.

How to Check the Battery Life on Galaxy S7

But. If, after all, your smartphone is no longer new and has started to hold a charge worse, you need to check its battery for the degree of wear and tear. This can be done in three different ways.

The first is to go to Settings – Battery and check the battery status. Another thing is that most manufacturers, for some reason, do not build into their smartphone firmware a mechanism for calculating the remaining battery life. So this way will not work for everyone.

The second way is to check the battery capacity with a special command. Open the “Phone” application and enter the following combination: *#*#4636#*#*. As soon as you press the last asterisk, you’ll be taken to a screen with smartphone information. Open the Phone Information – Battery Information tab and estimate the wear and tear.

The third way is to check battery life using an app. In fact, there are several of them. We can recommend three of them: CPU-Z, Battery, and AccuBattery. The third one is the most comprehensive in terms of functionality, but you need to use it for a while before it evaluates the battery life.

The other two assess it immediately, but not in percentages like AccuBattery, but in relative units: excellent condition, good condition, service recommended, service required.

As you understand, excellent and good condition are satisfactory units. They roughly mean that wear and tear are still at a fairly low level. That is, the residual capacity of the batteries can be between 100 and 85%. If the residual capacity is 80%, maintenance is recommended.

And if lower – it is strictly obligatory, because with such figures the smartphone not only lives less but also is prone to spontaneous reboots. In this case, take the device to the service and order the battery replacement service.

How to Replace the Non-Removable Battery on the Samsung Galaxy S6 Active

The lifespan of a lithium battery is much shorter than that of any smartphone. Sooner or later we will still have to replace a worn-out power source with a new one, no matter what model of gadget it is used in. But what to do if we have a smartphone with a non-removable battery?

A built-in battery in some disposable phone or a penny gadget like a heart rate monitor is a common and understandable phenomenon. You use it for a year or two, throw it away, and buy a new one.

Nevertheless, talk that the smartphone becomes obsolete before its battery “dies” is very common. But, first of all, morally is not physically.

In general, the device even 3-4 years old is quite functional and very effective. Secondly, despite the rapid development of electronics, no smartphone can not become obsolete in 2-3 years.

And such conversations are held mainly by those who with shaking hands and square eyes follow the release of new models in order to grab the coolest and show that he himself is cooler than a boiled egg. This is already a diagnosis.

But even these “cool”, despite a rather severe mental illness, for some reason do not throw away their previous gadgets, but rather successfully sell them.

So the myth that a non-removable battery is made because the life of a smartphone ends simultaneously with the life of the battery is complete nonsense. So why do the vast majority of modern smartphones have a built-in battery?

The first thing that comes to mind, and this thought is not without a certain logic, is that the manufacturers intentionally complicate the replacement, so that the user takes the gadget for battery replacement to a specialized service center, leaving there his money, and a lot of it.

But despite the fact that the battery in these devices is called non-removable, it can be replaced. In any case, service centers do it. And since they do it in a service center, you can replace a fixed battery yourself.

The only thing you need is to have direct hands and the appropriate knowledge. You do not even need special tools to work with most smartphones.

To replace the battery, we will need:

  • Phillips screwdriver 1,5 mm;
  • A plastic tamper tool (thin plastic screwdriver);
  • suction cup;
  • thin double-sided tape;
  • household hairdryer;
  • tweezers;
  • glue for repairing mobile devices (at the worst, “Moment” or similar);
  • the battery for replacement.

Turn off the smartphone, remove the SIM card, remove the protective screen, if there is any. Heat the sides of the device with a hairdryer, a little bit capturing the front panel.

  • Put the suction cup on the bottom of the screen and start pulling it very slowly and carefully until a gap appears between the body of the smartphone and the bottom of the front panel. Pull very carefully and lightly, so as not to break the display. If it does not work, without removing the suction cup, once again warm the seam around the perimeter of the smartphone.
  • Insert a plastic screwdriver into the gap and go all the way around it, slowly unsticking the panel from the case. At this stage do not work with the suction cup, so as not to break the screen. If necessary, periodically warm the seam in the place where you work with the screwdriver.
  • After the panel is completely peeled off, bend it up. Remove the sticker covering the loop connector. Using a plastic screwdriver hook the flat cable, pry it up, and remove it from the connector. Now you can take off the front panel completely and set it aside.
  • Using a Phillips screwdriver, loosen the 16 screws that secure the inner frame.
  • Disconnect the battery by pulling the connector plug. Use your fingers to press the edges of the case to open the latches that fix the inner frame around the perimeter. Now the frame with the battery can be removed.
  • Turn the frame and with the same plastic screwdriver try to remove the battery. If it does not yield, then we heat the back of the frame with a hairdryer to soften the adhesive. At the same time we heat only the frame, but not the battery.
  • Now we need to apply thin double-sided tape around the perimeter of the frame in those places where the glue was previously applied (we peel off the glue), install the new battery, assemble the smartphone and glue the front panel back in place.

So we found out that the smartphone with a built-in battery is not a disposable gadget, and the battery in it can be replaced without the help of specialized workshops – so save time and a lot of money.