| 摘要 |
A method and a apparatus for determining the battery level of a rechargeable battery (3) used in a battery driven apparatus (1) for driving a load (2) and for indicating a low battery level are described. A repeating measurement of the battery voltage and a determination of a threshold for indicating said low battery level are provided. The running time of said apparatus (1), while driving said load (2), is accumulated since the last charging. Further, the accumulated running time is repeatedly stored as sequenced data logger entries (9) in a data logger memory (7) until a reset of said apparatus (1) due to insufficient battery capacity or until charging of the battery (3), and said threshold is determined after a reset of said apparatus (1) based on said data logger entries (9) and a required remaining running time of said apparatus (1) upon indication of low battery level. (Fig. 2) |
