Hi Chris. after reading your concerns about cell phone batteries I did a google search for exploding phone batteries. there were a few stories from places like ZDNet and TheRegister. These included accidents due to batteries catching fire or exploding and battery recalls. They all seemed to have taken place between January and July 2004 so there seems to have been nothing recently I have found but this was hardly exhaustive research. I would think you would be fine providing you buy from a reputable brand. Cheers Graham