I didn't realize the corduroy cushion I purchased for $2.99 from Goodwill the other day had any special features until, after hours of using it to pad the seat of my wooden desk chair, I noticed it was especially hard in the center.
When I unzipped the back (yes, it zips) and dug around in the foam stuffing, I discovered… THE LARGEST BATTERY PACK I'VE EVER SEEN. The clear plastic apparatus inside the cushion was larger than my outspread palm and contained two D-size batteries (of the four required for operation). How I missed the extra firmness and heft of this pillow in the Goodwill store and under my ass for four hours, I cannot tell you.
I'll be honest: I'm not quite sure what a battery-powered pillow is capable of. During optimistic moments, I convince myself that if I purchased two more D-size batteries and flipped the switch, it would sing me a Christmas carol.
During more realistic moments, however, I'm positive that I never want to touch my pillow again.