Is the Touch ID hole a similar size to be able to replace the digitizer with an iPad Air glass? Please let it be so!

Are the batteries DEAD DEAD or will they just not charge? There are some tiny resistors next to the battery connector that help control the power to and from the battery and if even one of those gets knocked off the phone loses it's ability to charge batteries. It's a little difficult to see them without a scope but you can try to use a magnifying glass as well. Hope that helps!