Lumia 710 Battery

I have been having battery troubles with my lumia 710. I turn my phone off when I am at school but when I turn it back on after school it is almost dead when it was at full charge when I left for school. I don't use my phone much and it does not last me the day. I got my phone in March so I will not be able to upgrade to the lumia 920. I will be taking my phone in to Rogers on Saturday. Has anyone else has this problem or is it just me?