Battery drain after 25%

[Android Question]

I have Micromax Canvas hd purchased 1 month ago.I m facing a serious trouble which service center also cant solve(as i have tred visiting it).When I charge my mobile pretty well say above 70% or e1 100% and when it reaches to 25%,my battery drains too quick till 12% without having any apps open.After 12% I tried charging till 35% but it drains normal till 0%.I have updated android from service center,changed battery also.They say that motherboard needs to be replaced(they havnt understood the problem yet properly).Is it firmware problem?
in which some files are corrupted due to which it is showing wrong battery stats.Beacuse I get normal battery life.I can use it for 1 day after normal usage.
Please help me guys :'(

 

[Mr. Lucky]

If you are getting normal battery life, it sounds like only your battery stats are messed up. It's kind of a hassle to reset them without root, but it can be done. Here's how:
https://community.verizonwireless.com/thread/754534/

 

[Rohit92]

Thanks,ill try this method if it works.1 thing I 4got 2 mention that after 85% on charging it jumps to 100% in 2 minutes.Is this a motherboard problem??i have already replaced a battery.or jus batterystats prob?