Involvement:General (knows how to use it) - Ownership:1 week to 1 month
Good backup battery.Can charge 2 times of mt iphone 3gs
Lightweight; design is acceptable; price is affordable; iPhone charging time is good enough, about 2hr to charge from 50% to 100% (see charging graphs)
Should come with usb cable as well.
Quality no bad.
It also works on iphone 4 as well.
It requires 5+ hours to charge the 2800mAh battery using iPhone's original charger when battery empty.
Must buy.Good backup battery when you are at outside or travellling.
In general for one day of business usage this ext batt can help iPhone users that does not carry the AC charger every where you go.
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