August 19, 2014 6:36 pm Consumer Reports: Cell Phone Charging Cases Phone batteries always seem to run out when you need them! To the rescue—smart phone cases with a built in battery. NBC 6’s Trina Robinson tells you which ones work best. US & World Videos 1:46 Officials investigate overnight stabbing in Little Haiti 0:22 Woman arrested after man found stabbed in Miami 1:52 Massive pet adoption event at Miami-Dade shelter 1:32 Video shows aftermath of deadly shooting in North Miami Beach 8:17 Trayvon Martin's mother shares mission of hope and healing