Massage Supplies

I was watching television the other day, and I noticed that the batteries on the remote control were fading quickly. Desperately, I searched the house over in my quest to find replacements, as it was too late to go to the store. After looking seemingly everywhere, I decided to check my great-grandmother’s bedroom (she lives with us for practical purposes), but nothing. I almost walked out of the bedroom waving the white flag to the Battery Gods, but then I remembered that I hadn’t checked Nana’s dresser. Low and behold, she had a massaging tool that must be made to fit in her belly button and between her toes, because it’s not shaped like a normal back massager, but it emits a wonderfully delightful vibration. Nana must get a lot of belly button and toe cramps because, sure enough, those batteries went dead soon after I put them in the remote. So should I just return the dead batteries to her toe massager, or should I buy her new ones? Will she get mad if she finds out?