Supercapacitor Based USB 5 minutes fast Charger Design

[Kedar264]

A 2.7 v 500 farad supercapacitor can be charged in 5 minutes, if provided with 3A charging current,after that charging cell phone for 30 to 50% battery level is possible.

The next level is then to step up the voltage upto 5 volts with minimum 500 ma for usable applications

Here's my video ,check out and let me know your better suggestions.

https://youtu.be/6UqNsCfb_zI

[firewalker]

Your video title is misleading. You are charging a capacitor in five minutes. Not a phone.

A phone battery would require far more energy that the capacitor used.

Alexander.

[Kedar264]

Well my intentions are to show the practical aspects of supercapacitor like the load it puts onto supply due to low esr it has ,and to show you that it is helpful for quick charging applications ....

[tom66]

Increasing the voltage beyond ~5.5V on my Samsung Galaxy S4 causes it to suspend charging.

On a friends phone, more than 6V stops charging and it brings up a message, "Charger overvoltage - Charging suspended"

A 5V supercapacitor will not charge the phone faster than a 5V USB connection. To charge it faster, you would have to access the battery terminals directly. You'd probably have to remove the battery altogether.

[Rerouter]

Without directly attacking the battery terminals, you would also have to tell the device via a data connection that it can pull that amount of current (i think 3A is the max for most controllers), not to mention charging at that rates going to kill off the life of the battery in the phone,

[subacati]

There's a video I came across today where they try to promote super-capacitors as replacements for batteries.

As far as I know, capacitors are extremely inefficient as energy storage devices because the higher their capacity is, they greater their leakage current is.

I wonder what Dave thinks? Maybe he should make a video testing this myth?

[Wilksey]

Durr, everyone knows that the fastest way to charge your phone is to put it in the microwave! 

[WZOLL]

Graphene super capacitors may replace lithium batteries in the future because of how slim they are. Super capacitors leak a lot so your phone would charge very fast but you would end up charging it 3-4 times a day.