Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
Quality. I don't how to say, but quality is not "Chinese". Plastic and printing is very "European". It feat IPhone 4 very well. It is easy to install and dismount. It has a switch to begin charging IPhone. Full capacity of this battery can charge your iPhone from 5 to 100 % of battery two times.
It is looks too big for its capacity. S2 external batteries have same capacity, but twice smaller. Long charging. No, VERY long charging. Standard internal iPhone 4 battery has approximately 1400 and charges 1,5-2 hours (using computer USB port). This thing charging 10-12 hours. If you use your phone while charging, it will charge only 5-10 % of battery for an hour. So you need to give a rest for your iPhone while charging, if you want to charge it quickly.
It looks like true original external battery from Apple. But charging micro-scheme is strange. Seems what it has very small amperage for charging its own battery and iPhone's battery.
If you have enough time for charging it is good buying. It's very stylish. But it is electric scheme don't allow urgent charging, amperage is too low.
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