<p>Wireless electrical stimulation devices have gained considerable attention due to their potential to offer therapeutic benefits in various medical applications, including pain management, neurological rehabilitation, and tissue regeneration. Traditionally, electrical stimulation is delivered through large, hospital-based equipment, limiting patient accessibility and convenience. Recent advancements in wearable and implantable devices, however, have paved the way for in-home electrical stimulation therapies. These devices, designed to be wireless and battery-free, offer greater flexibility, but their development hinges on effective methods of wireless power transfer. This review explores key approaches for wirelessly powering these devices, such as inductive coupling, mechanical energy harvesting, magnetic field induction, and optical power transfer. Each method presents unique advantages and limitations in terms of efficiency, range, and practicality for wearable or implantable use. Additionally, we discuss emerging materials that enhance device performance, including bioabsorbable materials that degrade naturally after use, stretchable materials that improve stretchability, and self-adhesive materials that enhance secure attachment. This review provides a comprehensive overview of the key strategies and materials that are driving the development of more effective and accessible electrical stimulation technologies. These advancements hold great promise for improving patient outcomes and expanding the use of electrical stimulation in both clinical and at-home therapies.</p>