dell laptop battery: original or compatible?

I bought Dell Inspiron B130 laptop from US three years ago. The battery is dead. Dell India support says the model is outdated and it does not have any battery. I have option of getting it from US, where it is still available but cost approximately Rs.8000 in INR. I am told that we get "compatible" batteries (probably Chinese made) for 6-7 thousand.
Is it advisable to get a compatible battery or should I go for genuine from US? If you suggest a compatible battery, which one is ideal and how much does it cost? Please reply based on your own personal experience.