the battery in passo which comes from Jp is flooded one, its specs are 42B1NL, incase it dies, the experts recommend using a sealed maintenance free battery. I used Hankook with same specs, Here are some battery costs i got from market, sharing for the benefit of readers
Different brands available:
APC, Nerada, Vision, Shoto, CSB
cost around 8000 to 12000pkr
Hankook, Daewoo, Solite, Tujiko, phoenix.
cost around 4500 to 7000 pkr