Below are some replacement Battery options For the HP Pavillion G62 Laptop. One of the cheaper generic batteries found on Amazon should work fine and is below.
If you want to get one that's for sure going to work with the HP G62, and may ultimately last longer, you could also purchase it from the below link on
NewEgg.com. The have a lot better quality items and they do some product testing. At $29, there's just a small difference in price for a potentially better quality battery;
NEW Battery for HP MU06 MU09 Notebook 593553-001 G62 CQ42 CQ32 593554-001 G72
