Hacking Question Charge Switch from Joy-cons

[Kubas_inko]

Straight to question. Is it possible to create some homebrew app that would allow Switch to use joy-con batteries to charge it self? I don't mean to discharge them completely, but to drain power from them so every battery is on same level (L Joy-con 30%, Switch30%, R Joy-con30%). One Joy-con has 525Mah si both might add like 10% to your battery life.
P.S.: I know that homebrew is not a thing yet and apps like this might never exists.

 

[Oleboy555]

not with software, but maybe with some clever hardware tinkering

 

[MK73DS]

That would indeed be nice. I always play in handheld mode so I don't use the joycons battery. If they can give 700mAh to the switch it will be very nice

 

[APartOfMe]

That definitely sounds possible, but it would be a ton of work. You would need to modify hardware and software

 

[Chuardo]

The thing is that the Switch can send energy to the Joy-Cons when they charge, but I don't think that they also have the Hardware capability to receive energy from another source that isn't the USB-C Port.