nexus 7 (2012) charging problem..!!!!!

[AC Question]

my nexus 7 (2012) is charging very slowly...and when i use it while charging , battery drains faster that it charges..also once it charged..even on moderate use its battery drains very fast
i am using stock nexus charger..with sony fast charging cable

so should i change battery or micro-usb port ??

 

[belodion]

A remote diagnosis of the trouble is hardly possible alas, but it does sound like a failing battery. Perhaps it isn't though.