Power cables for routers

[Lynder18]

How can I find out the size of jack plug for router as I need to purchase an extension cable & none so far have fitted 

[AdeZZZ]

Hi did you get this working, which cable worked? Thanks

I have a VF PRO II booster that I need to move to improve signal, the supplied power supply doesn’t have enough cable length for the position I’m targeting and I can’t easily extend the AC side due to other reasons. 
thanks. 
thinking to try the Amazon link suggested in this thread

[TheBlueM]

Hello: Can someone give me a link to buy a long router power lead? 
My Internet keeps dropping. They told me that I could not have it in an extension lead and needed to have it plugged into the main supply socket. I have done that, and the internet still keeps dropping. Then got told to many wi-fi attachments. I was with BT & Plus Net and never once had any problems 
Thanks 

[Cynric]

@TheBlueM please don't post twice 

https://forum.vodafone.co.uk/t5/Broadband-connection/Router-Plug-in-an-extetion-lead/m-p/2764371#M15...