---
title: RequestExtraPower
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.14+]
path: iokit/iousbdeviceinterface942/2977169-requestextrapower
---

# RequestExtraPower

## Declaration

```occ
IOReturn (*RequestExtraPower)(void *self, UInt32 type, UInt32 requestedPower, UInt32 *powerAvailable);
```