BatteryBox portable charger promises to keep the juice flowing even after five years
 

A new portable battery promises to carry enough juice to charge eight iPhones and keep your MacBook Air going for 12 hours, five years after you buy it. Unlike others that lose their capacity over time, BatteryBox uses a new energy management system...

http://www.engadget.com/2014/03/24/b...=rss_truncated