Get extra energy on the go with Duracell My Pocket Chargers. Use them with your cell phone, BlackBerry, MP3 player or any other device that uses AA batteries. The portable chargers give you 24 hrs. of usage and come in a two pack with 2 Coppertop batteries and connector cable. The PowerSource Mini has a lithium-ion battery that can be charged by AC, car DC, or PC USB port. Each is available for $19.99.