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#1 You can replace the battery
Will modern miracles never cease? With some of the more advanced Android phones, you can actually replace the battery if it dies while you're on the road. Just pop the back off, and drop in a spare battery. It's almost like magic.
By contrast, if you want a longer run with your iPhone, you have to mount it in some sort of ugly cradle backpack or battery sled, increasing its bulk and wait to more than the original phone.
If, someday, the entire phone frame becomes a battery, and battery life lasts a week instead of a day, it might make sense to eliminate replacement batteries. But, for now, the replacement battery of the S4 seems light years more advanced than a phone that just dies when it runs out of juice.
Image courtesy Samsung.