Correct

复电

/ fù diàn / 
Strokes

Definition

power recovery

Example

As a Verb

send telegram in reply

1
Wǒ
我
yǐ
已
fùdiàn
复电
  
。

I've already sent a telegram as reply.

As a Noun

telegram in reply

2
Pāi
拍
fùdiàn
复电

wire/cable a reply