Exclamation [Q] Acer Iconia A210 not charging

First of all I am posting this question here as I could not find a dedicated area for A210 tablet.

So here is the issue I am facing with my Tablet
My acer iconia 10" tablet worked great since yesterday, suddenly today it shows 3% charge despite continuously for many hours. I tried two difference chargers as well. The tab starts and works OK with power connected but the charge still remains 3%. The power LED also shows red when charger plugged in. The tab I got from Walmart about 6 months.
I am not sure if the battery can be dead in one day.
As this was a refurbished tab, I doubt if Acer will help without any warranty active.

Please suggest the best and cheap way to address this. I do not wish to spend on battery unless I know if it is the battery only.