Battery charging problem in A311

Hey , i am using Micromax A311, my mobile was charging 100% in 1:30 hours about but a few days ago its got switch off due to 0% battery ( electricity problem) and now after its my mobile is taking 7-8 hours for full charging , about 1% in 6 minutes
Also battery is draining fastly

Any advise? What should i do?

Sent from my Micromax A311 using XDA Free mobile app