Mobile device users tend to extend the device’s usage time by checking the battery level frequently via the battery level indicator (BLI) and adjusting their device usage patterns. This behavior is based on the assumption that the BLI is accurate. In this paper, we define four requirements that a user would expect for the BLI and define BLI anomalies that violate these requirements. We found various kinds of BLI anomalies in commercial smartphones. The key cause of a BLI anomaly is that the battery state changes dynamically depending on various factors, yet the existing BLI system is limited in delivering the battery status adequately. To address this problem, we propose a new BLI that defines the battery capacity as active, spare, and dead. The experiment results for the commercial smartphones show that with the proposed BLI system, BLI anomalies are removed, and accurate battery information is delivered to users.

移动设备用户往往通过电池电量指示器（BLI）经常检查电池电量并调整其设备使用方式来延长设备的使用时间。此行为基于BLI准确的假设。在本文中，我们定义了用户对BLI的四个要求，并定义了违反这些要求的BLI异常。我们在商用智能手机中发现了各种BLI异常。BLI异常的关键原因是电池状态会根据各种因素动态变化，但是现有的BLI系统在充分传递电池状态方面受到限制。为了解决这个问题，我们提出了一个新的BLI，它将电池容量定义为活动，备用和耗尽。商用智能手机的实验结果表明，使用建议的BLI系统，