Bought the Mophie Juice Pack Boost from Apple (Singapore) Online Store for S$69.90. I can’t seem to find it in any Authorized Apple Reseller stores in Singapore. Instead they are still selling the older model, the one with 1,500mAh battery (Amazon Link) instead of this 2,000mAh one.
The Mophie Juice Pack Boost is bigger and much lighter than it looks. I was expecting it to be more compact in size and heavier, but surprising it is lighter than any of my Eneloop Chargers that I bring along in my bag whenever I am out (which is a good thing).
Another advantage of the Mophie Juice Pack Boost is the built-in Apple 30-pin dock connector and hence you do not need to carry an extra Apple Dock Connector to USB Cable along with your backup battery which normally allows you to charge via USB port.
As mentioned earlier, the battery in the Mophie Juice Pack Boost has a capacity of 2,000mAh and this allows you to fully charge any iPod/iPhone models even if the battery is totally empty in your device.
It does charge your iPad but at an extremely slow rate since it only output a maximum of 1A. The iPad requires at least 2.1A for a proper charge.
The Mophie Juice Pack Boost also acts like a dock which holds your iPhone upright while it charges (see the last picture embedded in the post).