I purchased a XPS m1730 about 3 weeks ago.  After the second day of using the computer I started having problems with the battery.  I can run the laptop on AC power without any trouble, but when running on battery power the laptop will shut down without any warning anywhere within 5-30 mins.  The battery is not dead because when I turn the laptop back on the battery meter is around 85-95% full.  Any setting that I run the battery on, weather it be power saver or high performance it will shutdown.  The laptop is not overheated or hot at all.  When I use the battery, I use it right away when I first turn on my computer for the first time that day.  Whats going on here?