0x1004 unifiedBattery

The modern, unified battery feature — one call for percentage, a coarse level, and charge status, replacing the older 0x1000 batteryStatus / 0x1001 batteryVoltage features. getBatteryCapabilities reports what the device can measure; getBatteryInfo returns the charging percentage, a BatteryLevel (full / good / low / critical), and a BatteryStatus (charging, discharging, …). The feature also emits live updates as the device pushes them.

OpenLogi reads it for the battery percentage and charge state shown in the device carousel and the list inventory.

Spec: Logitech HID++ 2.0 — x1004 unifiedBattery. Used by: battery percentage / charge state.

Full function reference coming soon.