Described herein are systems and methods to determine when a new or fresh battery has been replaced in a medical monitoring device and store a record of such battery replacement so that the battery records of the medical monitoring device can be reliably kept over the life of the monitoring device.本發明提供之系統及方法係用以判定醫療監控裝置中何時更換新電池或滿載電池並儲存電池更換記錄,因此使得該醫療監控裝置之該電池記錄能夠於該監控裝置之使用壽命中均獲得可靠保存。