vw polo key

[quality100]

I've recently brought a 03 reg polo and it came with a key that has a built-in light which is provided for vehicles with central locking. But the botton seems to be broken, It is not radio wave remote key but I wanted to know if I could obtain one and if so how much will it all cost me.

[sm19051]

Key opens up and there is a battery inside. Can be obtained form dealer or any electrical store for a couple of pounds.