I just completed this, and my old battery was puffy, so it was ready to let out it's magic smoke. The doorbell gave no warning about the puffy battery, so I assume it wasn't a strain gauge. The new battery did come with copper around it, but the connector was coming out of the opposite end of the battery on the replacement, and the connector had to be rotated 180 to keep the color orientation as the original when I put the label in the opposite way from the original. I will say to be careful around the thin part around the doorbell and camera openings, as I broke the cover one time at each end while spudging when I should have been picking. Luckily, it was only one break per end. I ended up using a thin paring knife to cut through the foam, the picks didn't seem like the most efficient way of cutting the foam, but vital for making enough room to get the paring knife in.