How long should my iPhone take to fully charge?

So my battery life was on red and than I charged it and it's been 3 hours and it still has like 30% to go. Is this normal. Plus I can't open my iTunes on my computer it's said windows installing for 3 hours. My iPhone is new if that matters.

Probably around 45mins.

I don't know about iPhones, but I got the new iPad and that also takes a very long time to charge, about 10% per hour! So leave it (I usually do over night) and by the time I wake up, it's fully charged. Maybe it's something apple does with their new products?

Well I've got an iPod touch 4th gen and that usually takes the whole night to charge.

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