i could not give you a price, but something to make your battery life better. First rap it in news paper. stick it in the freezer for 1 ,24 hour, day take it out and keep the news paper and let it compleatly thaugh for a day. Charge it and it should last a long time. I have done it on my brothers and it went from 20 min to a hr. That will bring the price up quite a bit since people want battery power