Admittedly, a lot of products posted on SteemHunt are things we discover but don't necessarily own. But in this case, you can personally and directly vouch for this product, which makes it far more compelling! Comfortable pillows are really nice to have, now you can have an electric blanket and this pillow for super warmth!
So how fast do they recharge, I guess less than an hour, and maybe their charge lasts for hopefully a night (8 or so hours)? But yeah, a washable cover is great, it seems that in cold winters, pets might figure out how to activate the pillow and then just take control of it!