充電

1. Origins, structure, and basic meaning

• Structure: Written 充電 and read じゅうでん, it denotes the process of putting electrical energy back into a battery.
• Basic usage: It applies to charging a phone before bed and waiting until a battery has finished charging.

2. Common pitfalls and similar expressions

• Action versus completed charge
  • The word can refer to the charging process, so completion must be inferred from the surrounding expression.