# Battery (/docs/sims/conditions/battery)



`device.battery` sets the level and charging state. On an Android emulator the app sees it; on an iOS simulator only the status bar changes.

```ts
await device.battery({ level: 5, charging: false });
await device.battery(null); // the real battery back
```

| Option     | Takes   |
| ---------- | ------- |
| `level`    | 0-100   |
| `charging` | boolean |

|              | iOS simulator                                                      | Android emulator                              |
| ------------ | ------------------------------------------------------------------ | --------------------------------------------- |
| What changes | the status bar only: the result has `cosmetic: true` and a warning | the battery the app reads (`dumpsys battery`) |

## By hand [#by-hand]

```bash
warden ui battery set --level 5 --no-charging
warden ui battery status
warden ui battery reset
```

Release puts the real battery back.