Charged Or Discharged

[thinhnghiem]

Dear all,

I have an amusing experiment with my smart phone charger. That is, after charging it fully, I connect its input and output toghether, and get surprise result. 
Could you see in my youtube clip and give your explanation here

Thanks

Thinh Nghiem

[GAHD]

All i see is you slapping the battery pack around? How about some commentary.

What's going to happen with a cheap charger: bleeding your battery charge slowly by the resistance of the usb wire. Turns the chemical energy, into electricity, into heat.
->If the pack is REALLY cheap and doesn't conform to USB standards(re: no 500mA fuse, thermal cutout), it will probably heat/blow up the battery, and could melt the cord.

more expensive(or well engineered) battery pack: Internal microcontroller uses the TX&Rx lines to tell it's connected to itself in a short, caps off the flow to the 5v and does nothing.

[thinhnghiem]

Neither melt nor heat at all, Creating.

 

The light keeps to be red until it discharges completely. It's why I surprised

[TaimurMubeen]

It's Apple