---
title: UIDevice.BatteryState.unknown
framework: uikit
role: symbol
role_heading: Case
path: uikit/uidevice/batterystate-swift.enum/unknown
---

# UIDevice.BatteryState.unknown

The battery state for the device can’t be determined.

## Declaration

```swift
case unknown
```

## See Also

### Constants

- [UIDevice.BatteryState.unplugged](uikit/uidevice/batterystate-swift.enum/unplugged.md)
- [UIDevice.BatteryState.charging](uikit/uidevice/batterystate-swift.enum/charging.md)
- [UIDevice.BatteryState.full](uikit/uidevice/batterystate-swift.enum/full.md)