returns Do Power Supplies contain Batteries or are they technically/legally(?) batteries?

[Skeledom]

I need to return a power supply I ordered from Amazon.de from Ireland. The package is completely unopened and the
Amazon will compensate me for however much it costs to send the return so that isn't an issue.
What is an issue however is Ireland's stupid postage restrictions.
Essentially I can pay however much it costs to not only send the power supply back in 1st class shipping and tracking and whatever else I can add on, however, if An Post (the name of Ireland's postal service and is seemingly my only option of sending anything to another country) scans/xrays/etc the package and finds it contains any form of batteries not only will they not ship it but it gets locked up in a warehouse up in Dublin and I would have to pay a fee to get it back.

So I need to know, do Power Supplies for PCs contain any form of Batteries or are they actually batteries themselves, whether they are on a technical or legal definition?

I am completely new to building PCs and buying and using PC parts so forgive me if my question is stupid but I just don't know and I don't want to take any risks that could cost me more money.
Thank you.

[Skicardo YT]

This is what i found on google

 

No. But standard PC power supplies have a 5 volt standby rail which is powered at all times that the power supply is plugged in, unless the power supply has a physical power switch on it.

[AndreiArgeanu]

PSU's don't have any batteries, the closest thing to a battery that they do have is capacitors, but they don't hold much charge, and discharge over time and are not considered batteries to my knowledge.

[Kilrah]

No, no batteries.

[WhitetailAni]

They are battery-free.

Likely what An Post is referring to are lithium-ion batteries, which have to be declared and labeled with a "lithium-ion battery inside" label to be shipped anyhwere.

[handymanshandle]

are capacitors batteries? No technically not.
Won't stop me from not wanting to think of them as a type of battery though.

[Juular]

12 hours ago, handymanshandle said:

are capacitors batteries? No technically not.

Capacitors aren't batteries in any sense lol, technical or not. Why Lithium-ion batteries are given a special treatment in international shipping is because hydrogen which is a byproduct of their operation expands at low pressure conditions (as any other gas really), such in the cargo bay of an airplane, which can lead to the rupture of the battery, exposing it to the air and begin the explosive exothermic reaction between lithium and the air. Nothing to expand in the capacitors, they're not sealed.

But back to the question, no, PSUs don't contain batteries.

[handymanshandle]

9 hours ago, Juular said:

Capacitors aren't batteries in any sense lol, technical or not. Why Lithium-ion batteries are given a special treatment in international shipping is because hydrogen which is a byproduct of their operation expands at low pressure conditions (as any other gas really), such in the cargo bay of an airplane, which can lead to the rupture of the battery, exposing it to the air and begin the explosive exothermic reaction between lithium and the air. Nothing to expand in the capacitors, they're not sealed.

But back to the question, no, PSUs don't contain batteries.

Im aware, I've worked in shipping companies and work in a warehouse that ocassionally sends out products with Lithium Ion batteries.

But it was just a jest attempt at being facetious 

[Guest]

Power supplies are not batteries, nor do they contain batteries.  They simply convert AC to DC.