Battery extenders are useful to have when you are taking a long trip with your phone. But they are often bulky and a pain to carry around. bKey is different. This is a compact and elegant charger that can get you out of trouble in case of an emergency. It has a 230 mAh battery and holds charge over 30 days. bKey fits in your pocket and has a built-in USB tip and a micro-USB or iPhone tip.
You can charge your bKey using a USB port or an adapter. When fully charged, its light turns blue. bKey provides you with an additional 30 minutes of talk time and does not take a whole lot of space. You can order it on Kickstarter.