battery doesn't charge beyond 45%

[AC Question]

My Samsung Galaxy 6 (6 months old) does not charge beyond 45% or so. Why?

 

[B. Diddy]

Welcome to Android Central! How long have you left it charging to see if it goes beyond 45%? If you charge it overnight, then use it normally, does it seem to last like it has a 100% charge, or only a 45% charge?