Additionally, the Juice Pack Boost boasts an improved conversion efficiency, resulting in more power getting to the Apple device than typical chargers.
The Juice Pack Boost's advanced battery cell design has a higher energy output than traditional 500mAh batteries, allowing it to charge and be charged at up to twice the current of other batteries. Its invisible LEDs provide the Juice Pack Boost with an easy-to-see status indication as well as allowing it to act as an LED flashlight; the LEDs are not at all visible when not in use. The Juice Pack Boost is also more efficient than standard chargers, with 90% of its charge making it to your iPod or iPhone device.