Charging in very long hours and battery exhausts very soon

Hi,

I have Samsung Galaxy Tab 3, Model SM-T211 with Android version 4.4.2, Kernel Version 3.4.5-4496770.

I had issue with my tab was it used to take long hours to get battery charged and used to exhaust the battery within 2-3 hours. It used to turn off when the battery was 40-50% or sometimes at 60% too. I have changed the battery but it still is taking very long hours to get battery charged full. Last time I started charging at 1600hrs and it charged completely at 0900hrs in the next morning (about 25 hours). Please help me to resolve this problem. Thanks a lot for your help.

Ashwani