My Samsung Galaxy XCover 7 is about a year old and has started showing strange battery behavior. When the charge reaches around 40%, the phone can drop to 1% within a few seconds if I leave it sitting unused on a table or bed. This usually does not happen while I am actively using the phone, and once it reaches 1%, it can remain there for a long time. The issue first appeared during a cold Norwegian winter while I was skiing and listening to music, when the battery dropped from about 15% to 1%. Now it also happens indoors and at normal temperatures. I already close my apps, and the phone reports 91% battery health. What could be causing this, and is there anything I can try before replacing the battery?
3 Answers
The battery is probably no longer reporting its remaining charge accurately. A sudden drop like that usually means the battery voltage falls under load or the battery’s capacity has degraded, even if the phone still estimates its health at 91%. Replacing the battery is the most likely fix.
Try recalibrating the battery once: use the phone until it shuts itself off from low charge, then charge it uninterrupted to 100%. If it still jumps from around 40% to 1%, the battery should be replaced. The health percentage is only an estimate and does not rule out a faulty cell.
Cold temperatures may have triggered or exposed the problem, but the fact that it now happens indoors points to battery degradation rather than the weather. Since the XCover 7 has a user-replaceable battery, installing a genuine compatible replacement would be a practical next step.
I’ll try a full discharge and recharge first, and replace the battery if the problem continues.