Hardwire iPad to bypass battery

Hi there,

Does anybody have input or experience on how one would go about hardwiring power to an iPad? I have an old iPad 1 that serves as a coffee table device for controlling my home theatre but it's gone the same way as my last out of warranty swap - the battery no longer charges when the iPad is powered on. To get it to charge, I have to plug it in, power it off and leave it overnight and then it's back up to 100%. Thoughts? Thank you kindly in advance.