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.

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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.

  • no swelling. it drops extremely fast not just 0-2%. mostly 10 - 20%.
    – vzhen
    Aug 11 '14 at 3:50
  • From your observation, does the phone charge faster than it used to? Often times a phone will charge faster as the life of the battery diminishes Aug 11 '14 at 17:33
  • No, charge speed like normal. I updated my question with picture. Please check it
    – vzhen
    Aug 12 '14 at 6:50
  • I strongly believe it's the battery. Erratic readings like that tell me the battery is going bad. It reminds me of a " hollow charge " where it states its at a certain percentage but in reality its much lower. The only way to be certain is to ; 1. Factory reset phone after backing up info then experiment. However a battery replacement will likely solve this. Aug 12 '14 at 18:09
  • Ok. Will get a new battery and try
    – vzhen
    Aug 13 '14 at 1:38

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