How to scan the code in the hotel to charge the mobile phone and deduct 400 after half a month?

This situation may be caused by overtime costs, equipment damage, misoperation, hidden costs and other reasons.

1. overtime fee: the hotel may set a certain time limit for the mobile phone charging service, and an extra fee will be charged if it exceeds the specified time. If your mobile phone is charged beyond the time limit stipulated by the hotel, it may lead to additional charges.

2. Damage of charging equipment: If the charging equipment provided by the hotel is damaged, the hotel can deduct the corresponding expenses according to the equipment maintenance or replacement expenses.

3. Misoperation or misunderstanding: Sometimes there may be misoperation or misunderstanding, resulting in the error of expense deduction. For example, it may be due to system error or human error that leads to expense deduction error.

4. Hidden costs: Some hotels may not clearly inform the relevant costs when providing mobile phone charging services, or the cost information is not clear. This may cause guests to use the service without realizing that they will incur extra charges.