[Bob]

His team's prototype - which is around five inches square and wafer-thin - takes five seconds to charge from a normal power supply and can light an LED for 20 minutes.

Assuming a 10-milliamp load from the LED, a 20-minute run time for this device equates to a capacity of:

10 mA * 0.333 hours = 3.333 mAh

For comparison, a common non-rechargeable alkaline AA battery typically has a capacity of about 2700 mAh.

[visualops]

five inches square and wafer-thin

I used to have a bunch of those...they went in a slot on the keyboard..

[Cringing Negativism Network]

I want the patent on the adapter to fit these new flat plastic batteries retroactively, into every AA battery device in existence...

[dangus]

Well, that’s probably why it’s not going to market as is. Looking at the photo, I’m suspecting they’re expecting to use microchip technology to dramatically shrink the size of the “capacitor paper.”