Well Hashim I bought that from Shah Alam Market aka ShahAlmi...
Shop's name is National Electronics and their address is:
Ali Center, 16-A, Main Road, Shah Alam Market Lhr 042-7632915
They are selling another Inverter named Cambridge with same Homage specs but its price was Rs. 6000 only. But I thought not to buy such devices without warranty so I went for Homage Inverter.
They are just selling the product, in case you need to avail warranty services, you will need to pay visit to R & I Electronics at Temple Road. They are the only authorized dealers of Homage in Pakistan I guess.
Regarding Battery: I saw Metro catalog and like other electronic products it wasn't mentioned that Osaka Battery is under warranty.
Even if it is not, would you suggest me to buy it without warranty?