⟐ Answer edited February 05, 2026 at 23:11 MST

Recently I decided to replace the battery on my S20 5G, I did it using the guide here and all was good, or so I thought.

The health of the old battery according to AccuBattery was around 67%, after installing the new one I reset the cycle counter using the Samsung repair assistant app and let it cycle a couple of times from 0% to 100% to calibrate, also according to the guide here on the site.

Now, my "new", supposedly OEM, battery only showed 85% health after 2 weeks of usage. I discussed with the store I bought it from and they sent me another "new" battery, but after again resetting the cycle counter etc., and 2 weeks later even the second "new" battery is showing 81% health...

Am I doing something wrong here? Or are these batteries bad/used/fakes? I'm lost tbh...

Thanks in advance to anyone who can enlighten me!

⟐ Answered December 24, 2025 at 5:38 MST

⟐ Answered December 23, 2025 at 23:13 MST

⟐ Answer accepted November 29, 2025 at 22:20 MST

⟐ Answered August 14, 2025 at 3:06 MST

And can you give me some tips?

⟐ Commented May 20, 2025 at 3:52 MST

⟐ Commented March 24, 2025 at 11:36 MST

Firstly my phone got water damage and already service all part include’s motherboard and all other board there,and i went all funtinloned well with all system except it has no network signal when i insert a sim card .but a other wifi connection and other its seems to be normal .can helped me with some answers amd how to troubleshoot this error with less budget (diy ) so at the same time i can learn something from there .

⟐ Edited March 13, 2025 at 17:18 MST

I come here to ask for some advice on my water damaged galaxy s20.

Back Story:

I was changing the battery on my phone and as was suggested in the iFixit guide, I applied alcohol to the battery area to loosen the adhesive. Unfortunately, I didn't read the label and ended up putting alcohol that only had about 40% alcohol. This caused me to unknowingly damage the phone.

Once I finished the install I turned the phone on and initially, everything worked fine. I went to turn on the camera and I was told camera failure and was sent back to the home screen. After half a minute or so the screen went black. I tried for a little longer to hard reset the phone until I decided to quickly take apart the phone again, unplug the battery and look for the problem.

After taking the phone fully apart I discovered some liquid in the sd card area. I dried it as much as I could and put everything into a bag with desiccant overnight. This morning I reassembled it and tried to turn it on but still the same problem. I then took the phone even further apart and found that the humidity indicator near the bottom of the phone also was pink (though I never saw liquid there myself). I also cleaned all the electronics with contact spray (made for electronics) and scrubbed with a toothbrush.

Problem:

Phone turns on, vibrates, makes noise, charges, takes touch input BUT fully black screen.

I don't know wether my motherboard or display is broken (or both!)?

Replacing the motherboard is not hard and not nearly as expensive as replacing the display but I also don't want to get a replacement motherboard only for the display to remain black...

Any help is greatly appreciated!

⟐ Commented February 02, 2025 at 2:51 MST

I have 980f/ds

I replaced my charging port, and experiencing poor ceullar connection ever since. I think the 3g is bad and 4g is good.

I dunno what charging port I had before, but I first replaced to "b" type, and now tried "u" type - the problem stayed.

The parts are from AliExpress

Any ideas?

⟐ Answered December 13, 2024 at 11:12 MST

Not from control panel nor the settings menu.

It shows like its ON but faded.

I dont know what could have happen that cause this.

I have tried a few fix manuals out there but no success.

Hoped there was a manual here, but not yet😜

Can ypu help?

⟐ Answered June 06, 2024 at 9:18 MST

I bought the part and it was a simple fix phone charged again but now I have other issues.

It doesn't wireless charge anymore it starts to charge then about a minute in it stops

My wifi will not turn on I have made sure time zone ans time and date were correct, and when I go to turn on wifi it shuts right off

Now I'm noting my speakerphone and microphone don't work

I've tried everything but a reset because I cannot lost the information on my phone.

I was told I need to replace the main flex cable and the wireless charging coil so I ordered the replacement parts but haven't gotten them yet.

The flex cable is the thin one that said main and it was in bad shape.

Is there something else wrong with my phone if those replacement parts don't work? I really cannot afford $100s of dollars to replace a 4 year old phone. Unable to upgrade at the moment either but I need my phone working .

Thank u for any help

⟐ Answer edited February 07, 2024 at 20:48 MST

⟐ Answered January 06, 2024 at 4:19 MST

Phone A [Galaxy S20 (G980F D/S)] where most likely the motherboard + charging board need to be replaced (damaged during port cleaning, phone wont charge through wired nor wireless, quickly displays message saying phone gets too hot. Very rarely it will charge and then works fine for a while. Changing out the charging board did not fix the issue)

Phone B [Galaxy S20 5G (G981B/DS)] with a cracked screen and back glass

So my question is how to best proceed. My first thought is to remove all internals from phone B and place them into phone A, but I would prefer to have the 5G capabilities and am not sure if there are any necessary components (such as 5G antennas?) in the shell.

Any advice appreciated, thanks!

⟐ Answered January 04, 2024 at 7:35 MST

I am trying to make little gaming device similar to this and i want to know if I can get rid of the broken screen and use an external display via usbc to usbc. Would it work without the original display?

I could leave the broken screen on the phone, but it never turns of, keeps flickering, so it drains the battery way faster than it should.

⟐ Commented December 11, 2023 at 14:14 MST

⟐ Commented November 13, 2023 at 17:32 MST