After two years of use my Samsung Galaxy S8+ split open. Samsung original repair shop told me the battery had swollen and changed it one week ago.
The phone works, but it now gives of a signal (~5 tones, quickly). The signal comes irregularly, maybe once every 1-2 hours at home, charging. It often comes after I pick it up and work a little. I have held the phone still when the signal has sounded.
I have only heard the signal once when not charging.
The reason I take this seriously is that I once had an old Galaxy Note 3 that started giving off the same signal frequently. After a while it did not charge well. I had to turn this phone off to charge it. It was thoroughly investigated at Samsung repair shops but no error found. Battery, charger, cable and finally internal charging components changed (not at original workshop). But its charging never recovered. (This entire paragraph was about my old phone.)
I run optimization and only few apps at the same time.
When they changed battery last week they demanded that I removed the lockscreen and they connected the phone shortly.
I asked today at the workshop and they cleaned the contact. I have not used the phone much after, but the signal has come once more, when not charging.
So far it charges OK, but a new battery has not improved usage time.
What is the reason for the signal? Will this phone too develop charging problems? Can I do anything about it?
The last question is a little conspiratory: Does Samsung introduce software on older phones to make them less functional by not charging well?
I can now say the situation is not immediately connected to the charging. Today the signal has come three times when using the phone without it being connected to the charger.
I seem to have got rid of the alert sound by shutting down some apps. I could provoke the sound by starting some apps at the same time. My impression is that the situation is related to power consumption.
Samsung Service Center changed the battery. They said "We promise you an original battery, but we leave no warranty."
I have used the phone extensively for two years. Now that the battery has been replaced I have slightly shorter battery time!!