@lucky_tkc1988, Tusharkanta, Below 1st link is for a possible replacement battery which you can also do a search on for possible better pricing. 2nd link is a battery replacement guide and the 3rd/4th link is to ACER support/recovery. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.

http://www.ebay.com/bhp/acer-iconia-batt...

Acer Iconia W3-810 Battery Replacement

https://us.answers.acer.com/app/answers/...

https://www.acer.com/ac/en/MM/content/mo...