Simulaids Battery Leg for use with SMART STAT Patient Simulators. SMART STAT Patient Simulators operate by using a battery system located in the lower left leg. The system powers the SMART STAT for approximately five hours and is rechargeable. Charging the battery system also takes approximately five hours. Having a spare battery leg lets you continue training on the SMART STAT all day without plugging the simulator into an electrical outlet. Size: 31" x 8" x 8".