Pls Help Me With My Advent 7113 Battery.

My Advent 7113 is not only giving me headache,but also stomachache.I need a new one,pls can somebody help me on how and where to get a new battery 4 Advent 7113 b/c i've searched the whole Onitsha all to no avail,d ones that i found are not compatible with my laptop.You can reach me thru chris4christ24@yahoo.co.uk or 08035483968 if u have any help.Your help is highly needed & would b appreciated.