Xpal's SpareOne disaster-ready cellphone was one of the most intriguing devices we saw at last year's CES. Using a huge capacitor, the stripped-down GSM handset promised a 15-year battery life from the charge of a single AA Energizer battery. While the call quality was basic, it could certainly be the sort of unit that you could stow in a first aid kit or car trunk for emergencies. Now the company has returned with the SpareOnePlus, which adds location-based dat
