电源 diànyuán electric power source
How to remember 电源: 电 electricity + 源 spring = electric power source.
Characters
How it is used
- The power source/supply for a device, or the mains - 打开电源 (dǎkāi diànyuán) switch on the power, 插上电源 (chā shàng diànyuán) plug it in.
- Concrete and device-level: the socket, the button, the PSU - distinct from grid-scale 电力 (diànlì).
- Everyday tech and appliance talk.