1# System Common Events (System API) 2 3This document provides indexes for system common events defined in OpenHarmony. 4For details about the definition of a system common event, see [Support in @ohos.commonEventManager (Common Event)](./js-apis-commonEventManager.md#support). 5 6 > **NOTE** 7 > 8 > This topic describes only system APIs provided by the module. For details about its public APIs, see [System Common Events](./commonEventManager-definitions.md). 9 10**System capability**: SystemCapability.Notification.CommonEvent 11 12* [COMMON_EVENT_CHARGE_TYPE_CHANGED](./common_event/commonEvent-powermgr.md#common_event_charge_type_changed) 13Indicates that the system charging type has changed. This event is available only for system applications. 14 15* [COMMON_EVENT_DEVICE_IDLE_EXEMPTION_LIST_UPDATED<sup>10+</sup> ](./common_event/commonEvent-resourceschedule.md#common_event_device_idle_exemption_list_updated) 16Indicates that the exemption list for resource usage restrictions has been updated in idle mode. This event is for system applications only. 17