飛機裏有沒有插頭可以差電呢？

It depends on the airlines.

Due to the range, airlines tend to use smaller (regional) aircrafts. In this case, it is possible that the aircraft has no power outlet.

You will have to check with the airline for detail.

But one is offered, it will be an universal outlet (for all plugs). Also, in some cases, a USB port will be also offered.

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國泰航空(CX) 中長途航線 Airbus 的椅背後 (即你面前)有三腳(四方頭)插蘇掣，可接 notebook，mobile phone (用 adapter) 和 tablet etc. 至於其他航空公司的航機無可奉告。

有USB插頭,可以充電,但是有些飛機可能沒有