Battop via Amazon offers its Battop Universal Foldable Bluetooth Keyboard for $26.99. Coupon code "DOUVYMTW" cuts it to $15.92. With free shipping, that's $11 off and the best price we could find. It measures 9.3" x 6.3" x 0.2" when open and 9.3" x 2.2" x 0.7" when closed; it lasts up to 40 hours on a full charge. Deal ends January 31.