Default Galaxy tab 3 SM-T210 Problems with battery meter

First sorry for the translation, I'm from Brazil and I'm using translator ok.
I come here asking for help to you to solve a major problem that is plaguing me, and the next have a galaxy tab 3, SM-T210 model, the following is happening and the battery meter this crazy carry the tablet 100% off when I turn on 10 minutes on the battery drops 1% to% the tablet works well for hours, and placed on standby screen off the meter starts back until you reach 100% and so continues the meter is completely crazy, already tried everything restored original factory hard reset, I root already used the battery calibration, practically already tried everything porfavor count on help from you to solve this problem, I'm waiting thanks.