The MDPro 115-065140-00 is a high-capacity rechargeable lithium-ion battery pack designed specifically for the Guardian Plus patient monitoring system. This medical-grade power cell provides a reliable 11.1V output with a 4500mAh capacity, ensuring consistent performance during patient transport or in the event of an AC power failure. Engineered for durability and long-cycle life, the battery supports the high-demand multi-parameter monitoring functions of the Guardian Plus unit. Its intelligent internal circuitry protects against overcharging and short circuits, maintaining the safety and longevity of both the battery and the monitor. This original manufacturer component ensures seamless compatibility and restores the device's full portable operating time.