Why don’t the cell companies just sell a pack that contains a spare battery and charging station for spent batteries, so you could charge one battery while using another and quickly swap out the low battery for the one in the charging station? Seems there’s money to be made there.
I have an external battery for my iPhone (3rd party vendor) that you can charge up and then discharge directly into the phone via the docking port. It’s nowhere near as fast as the technology described above, but it’s great to have when I’m making heavy use (especially location services stuff, which can be a battery hog) and can’t get to a regular charger.
Some folks also sell battery cases that function as a phone case with a built-in external battery like the one above.
Still, being able to fully charge in seconds would be amazing.
They already do, or at least Blackberry has them. I’ve had them for several years. BB battery OEM battery holder price has dropped to about $5 on Amazon, bring your own USB cable and charger. Take the lid off and extended life batteries fit as well. There are also 20k mA battery packs that darn near recharge all smart phones and tablets for under $50.
Free market at work.
You can get pocket-sized batteries with a USB port that will charge any device for under $20 and some of them can be recharged with sunlight. Mine holds 2.5x the charge of my phone battery: