Imagine experiencing one of the following scenarios… …You are at the end of your conference day and heading to the trade show floor. However, your cell phone is registering 7% battery life and you are faced with a choice: either return to your hotel room to recharge it or let the phone die. To complicate matters, you have a mandatory work conference call at 7 p.m. -- ninety minutes from now. …You are at a festival or outside event for several hours. You’ve been taking photos, p...