Wasp Rechargeable BatteryWasp Rechargeable Battery Meet the Wasp Rechargeable Battery, a compact LiIon power source engineered for todays portable handheld devices. Weighing less than traditional rechargeable cells and designed to fit snugly into tight spaces, the Wasp delivers a reliable 3. 7 V DC to keep your devices ready when you need them. Its smaller footprint and light build mean its easy to carry as a spare or to replace disposable batteries, making it an economical,