Or even peace of mind, 'cause "piece of mind" is what my husband is giving me about this! LOL, just joking, he's less convinced than I am about changing the casing, he reckons they should also do this for free if it has anything to do with the new battery... which is why I'm asking about it. I shall probably go for it, since I plan on having my beloved for a long, long time, if possible.