WTB: LapTop Battery ( Hp-Compaq) v6000 help needed!

well guys basically i want to buy laptop batter mine old one is dead now , thing is that i have heard from someone that there are some china based external batteries are available in the market at very low prices . any body have idea about that guide plz ( IN LAHORE) and 2nd thing i went to HC today and come searched the market for batter prices i got different rates from different shops 6 Cell battery in 4-5K 12 cell battery in range of 5.5-7k , so guidance required and please refer any shop if you have any experience of buying a battery for your laptop or the model i have.