Support Stratosphere won't turn on!

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http://androidforums.com – My Samsung Stratosphere turned itself off sometime earlier tonight during dinner (fully charged right before we went out to dinner), and now is rebooting to the Samsung logo, and then turning back off, and rebooting (a couple times earlier it booted to the main android menu, but turned back off immediately afterwards) and when I plugged it into the charger it acts like it's charging and then turns off and acts like it's charging and over and over again, even when the battery indicates that it's at more than half full. Does anyone know what's happening? (no custom ROMs or anything, it's al (General)