Mophie has taken the wraps off its new lineup of Juice Pack external batteries for the iPhone, iPad, and iPod touch. The Juice Pack Powerstation is a 4,000mAh external battery offering 2 amp output capabilities for fast charging of the iPad over USB, a four LED charge status indicator, and built-in short circuit, overcharge and temperature protection. It will sell for $80. The smaller Juice Pack Boost offers a 2000mAh capacity lithium polymer battery,…