Samsung duos remove and re-insert battery makes battery life sudden drop I have a samsung duos i9082 without root.
the battery life drop 10% - 50% when remove and reinsert the battery.

So my question is.
is this a battery problem or devices or software?

Does replace a new battery fix this issue?

update question

The first drop is remove and re-insert battery.
The second drop is from 15% - 0% (less than 5mins)
48% usage by screen.
In my experience as a phone technician, that kind of issue is most often the battery. There will usually be a 0-2% drop after a bat pull because of the required power for boot up. Does the battery have any sort of swelling to it? If so then it's undoubtedly the battery.