I probably already know the answer to this but here goes.
a few months back i found a 5V router and wired an old USB cord to the power plug so i can use it Via USB powered.(5V)
i was wondering if could wire my tablet battery(2800mAh) to the cord i made a few months back to have a portable router.(which i have plans for) like possibly have it like a "Y" cable, that splits at 3 ends.?? and have it charge and discharge correctly?
I suspect No , but worth a shot.