The right cable to extend a small power lead

[Sprogginz]

After quite a bit of research I bought this to extend the power lead for an Amazon Echo Show 5 2nd generation.

4.0mm x 1.7mm DC Female to 4.8mm x 1.7mm Male Extension Patch Cable 90cm

I did not want to simply use an extension lead as it's really cumbersome where I have the device.
The problem is that the joining part of the cable fits but not into the device. I don't know if it's the fault of the extension lead or the device has a bespoke fitting.

Regardless, I'm now thinking of simply using a couple of basic connector blocks wrapped in insulation tape as they won't be seen. I've never done this to this sort of cable before. If it's all possible, what type of cable can I use? I've got some twin from an alarm clock if that will work?



Thanks very much.

 

[Taylortwocities]

You have bought the wrong cable.
The Echo Show 5 (2nd gen) power plug is 4mm x 1.7mm
That’s why the 4.7mm plug doesn’t fit!

See here for the right one!
5M Extension Cable Lead for Amazon Echo Show 5 2nd Gen (C76N8S) https://amzn.eu/d/3q7CBs5

Don’t chop the cable and try and add more wire. It will look awful, and you need to ensure the polarity is correct. And you’ll invalidate the warranty.

 

[Sprogginz]

Is there an award for 'nob of the year' on this website? I nominate myself.

And it's right there in the description, as clear as anything, yet all I saw was 4mm x 1.7mm, looked at the picture and thought 'Yep, that's it'.

Thanks very much, really appreciate it.