Why waste space for gaskets and o-rings when you can already get the battery changed out while you wait with glue? Glue is clearly the superior method, which is

Why waste space for gaskets and o-rings when you can already get the battery changed out while you wait with glue? Glue is clearly the superior method, which is why almost the entire market has adopted it. Heat pads exist even in the most basic repair shops. It's not advanced technology, no need to over-engineer it.