I would have got got a bigger battery but i need to have a case with my phone so i got the 1750.
Seidio makes a case that covers the 3500 extended battery. I agree with the previous poster about spinning your wheels and jumping through hoops to try to stretch your battery life. Simply buy a bigger battery (the 3500 would be my recommendation) and get on with your life. It's money well spent and it resolves the issue completely.