If you are opening any app then (refresher/loading) it is taking some time to open the app..Koi Bhi App Open Kr Rhe Hai To ( Refresher / Loading ) Kr Rha Hai App Open Hone Me Thoda Time Le Raha Hai.
To recalibrate your Samsung battery or reset its charging statistics, dial *#9900# or *#0228# on your phone's keypad. These hidden codes help resolve battery percentage glitches and force your system to relearn its actual capacity