I get about 3-4 days battery use out of my 7230. I don't make phone calls on it, and rarely use the backlight. I send and receive a fair number of emails, and do a lot of web surfing via the BB and Opera Mini broswers, and I have it set to shut off automatically at midnight and turn on at 10:00am on the weekdays. I could get better battery life, but I have apps like PicoNews which is an RSS reader that is set to push news and blog articles to me automatically, and that will draw down the battery charge some. I probably should top my battery off more, I tend to let it get down to the point where the radio auto shutoff kicks in before I charge it.