An Post Prohibited Items.

Hello.
Is it possible to send a smartphone with an integrated lithium-ion battery to another address in the Republic of Ireland using An Post, either standard or registered service. Their website does not give definitive information regarding this other than it would be prohibited if sending abroad.
Thank you.

Seems clear enough to me that you can't:

Restricted items

An Post restricts a number of items on both its national and international postal services.

...

Full list of prohibited items:​

• ...
• Batteries including lithium-ion batteries, sent individually or as part of an electric device
• ...

Click to expand...

Use a courier instead?

On further investigation it appears permissable if sent by either registered or express post. Anyways, I'll find out when I visit the post office.