Among the most highly rated electric shavers for bald heads, are the Phillips Norelco QC5550 Headgroomer and the Skull Shaver, according to GroomNStyle. The company also recommends the Headblade Sport and S4 Eclipse models.
The Headgroomer features a rotating head and self-sharpening blades. It's compatible with all voltages, requires no lubrication and is completely waterproof, so it can be cleaned under running water. The Skullshaver is notable for its unusual design; it fits completely in the palm of the hand and has five flexible rotary blades that conform to the shape of the head during shaving. The Headblade models both roll across the head on wheels and have a finger grip to provide stability while shaving.