Portable Device

Use AOperatingSystemPortableDeviceActor when the device should simulate battery life, charging, and low-power warnings — laptops, phones, tablets, or any unplugged hardware.

Added in v3.5.0.

stateDiagram-v2
  [*] --> Full: Battery above low threshold
  Full --> Low: Level below warning
  Low --> Charging: Begin Charging Battery
  Charging --> Full: Level restored
  Full --> Draining: Unplugged
  Draining --> Low: Consume delay ticks

Create the actor

1. Blueprint Class → Portable Device Actor
2. Assign your UOperatingSystemBaseDevice class (same as a stationary device).
3. Place in level and configure battery settings.

Battery settings

Setting	Description
Has Battery	If false, device will not start
Battery Level	Starting level; 0 requires Begin Charging Battery before boot
Battery Consume Delay	Seconds per 1% drain while unplugged
Current Battery	Name, brand, capacity (mAh), charge rate, efficiency loss
Low Battery Warning Level	Triggers warning event below this level
Battery Save State Flags	Auto-save on consume/charge events

Blueprint functions

Function	Purpose
Begin Charging Battery	Start charging from a power source
Stop Charging Battery	Unplug
Set Battery Level	Cheat / narrative override

React to battery events

Portable devices emit C++ events you can listen to through Device Messenger:

Example: show a UMG overlay when On Low Battery Warning fires, or save the game when On Battery Consumed matches your save flags.

→ Using Device Messenger

Stationary vs portable

	Device Actor	Portable Device Actor
Use case	Desktop PC, kiosk, server	Laptop, phone, tablet
Battery	N/A	Full simulation
Device class	Same UOperatingSystemBaseDevice	Same

The OS and programs are identical — only the actor type and power model differ.