We will be traveling in Ireland for 3 weeks. We rented an apartment and will be making trips from that base. Do we need adapters to use our computers and how about recharging our cell phones.
See FAQ tips: https://www.ricksteves.com/travel-tips/phones-tech/electric-adapters-converters
Typical electronics (computer/cell phones) use inputs 110-240 vac 50/60 Hz and with outputs to match demand. You are good to go with plug adapter.
Heat devices (e.g. irons/dryers) are a different story.
There are converters and there are adapters.
Converts change the current of the electricity. As Edgar pointed out, if your devices say 110-240, there is no need for a converter. This is usually found on the device's charger.
Adapters allow the plug on your device to fit into the wall socket in Ireland. You will need a plug that looks like this:
I see that that adapter is marketed for the UK, but I wonder if it meets the regulations. The specifications don't mention a fuse, I can't see one, and the insulating band around the conductors seems to be missing. It may be legal in Ireland but I don't know.
I used the Rick Steves adapters in both the UK and Ireland with no problems.
Interesting comment, Nigel. My first thought was 'nonsense', since I've been regularly using a similar adapter purchased years ago in Canada. Then I did a bit of googling and it seems plug adapters in the UK should meet standard BS5733. I found this adapter, sold in the UK, and it clearly has, as you describe, a fuse and insulating bands on the live and neutral pins:
http://go-travelproducts.com/uk/electricals/adapters/usa-visitor
Hmm, now I wonder if my UK/Europe or Europe/US adapters meet the correct standards.
I think the standard applies to equipment either sold within the UK or sold by a foreign vendor to a customer in the UK, so presumably it's legal to have these non-standard adapters if purchased elsewhere. Whether it is wise to use them may be another matter entirely!