Mobile chargers, small devices with batteries that you can plug a dying cellphone into, have been around for a while. But because they serve just one purpose, they haven't caught on that well. People need to remember to carry them around with them so when the time is right, they have it on hand. Easier said than done.
This new charger, however, is different. It's actually a functioning pen that also charges up phones. Simply pop in a single AA battery and you'll be set to give your dying phone enough juice to make 100 minutes of phone calls. No need to recharge the pen, since a simple battery replacement is all it needs. It's a smart idea, one that will make it much easier for people to always have a mobile charger on hand.