lasts for a few days? how long are you looking to get the battery to last? with no wireless connection, no bluetooth, and no media use at all, you will get about 9 days. so with using it, constant connection to then network, and running an app, you are gonna get somewhere between 1-5 days depending on the actual use. welcome to the forums.
Maximum Battery Life - BlackBerryFAQ.com try that for more