Core Energy Items
Portable Mobile Charger

Core Features:
- Cannot be stolen, dropped, or lost upon death
- Serves as the energy source for all electronic devices
- Upgradeable capacity expansion
Basic Functions:
- Provides charging service with maximum 100% power
- Automatically converts fuel into electrical energy
- Provides charging service for other devices
Usage:
- Right-click to use fuel items for refilling
- Place devices needing charging into inventory for automatic charging
Detailed Mechanics:
| Mechanism | Base State | After Upgrade |
|---|---|---|
| Fuel Storage Capacity | 20 units | 40 units |
| Conversion Interval | 5 seconds per cycle | 5 seconds per cycle |
| Auto Recovery | None | Recovers 1 energy every 5 seconds during the day |
| Conversion Start Threshold | Power < 90% | Power < 90% |
Fuel Efficiency and Conversion:
- Conversion efficiency increases with usage: initial 0.1, +0.1 per time, max 1.0
- Actual energy obtained = converted fuel × current efficiency
Available Fuel List:
| Fuel Type | Conversion Unit |
|---|---|
| Wood | 1 unit |
| Grass | 1 unit |
| Charcoal | 2 units |
| Nitre | 2 units |
| Nightmare Fuel | 5 units |
