This is the battery:
https://www.amazon.com/gp/offer-list...&condition=new
https://www.ebay.com/sch/i.html?_fro...05070&_sacat=0
My question is if you follow the iFixit guide it says that the back cover is glued to the device, but how do you reassemble? Does it need to be glued back on? The site doesn't say. It just says to reverse the disassembly procedure.