I have the following devices I am taking on my trip - Apple iPhone 14, USB-A charging headphones, Apple Watch (USB C charging adapter), and a laptop.
I am thinking I need a step down converter from 220 to 110V to plug my apple charging adapters into the USB A and USB C ports and a outlet plug for the laptop.
Thank you
Look at the fine print on your charging adapters. If it says something like "100-240V", then
it is a dual voltage adapter and you won't need a stepdown, just a plug adapter for the
countrie(s) you are going to. I would guess that all of your devices are dual voltage, and
it may depend on how old your chargers are.
If you have multiple chargers and the laptop one is the traditional "brick", I would say you
should consider getting a universal travel adapter that supports dual voltage, USB-A and
USB-C and supports the GaN fast charging protocol - you will save space and weight by
only taking one charger, and you can charge multiple devices at the same time if you have
the proper cables and/or plug converters.
Edit - your laptop needs to be new enough to have a USB-C port that supports charging
(all of that is relevant, some USB-C only supports data xfer) for the single charger solution
to be viable). Or, if there are enough USB-A outlets on your laptop, you can charge the
laptop via the wall plug and charge everything else through the laptop.
To charge the laptop, the travel adapter needs to be ~60W or above. You may see many
cheaper adapters, but they support charging phones and tablets, not laptops.
There are many, many options and lots of websites that will give you reviews/recommendations.
Just search on "universal travel adapter" or something like that.
In all my years the only low voltage charger that I ever encountered was one made by Nintendo. "Don’t argue with me daughter, I know what I am talking about .... just plug it in and stay out of my hair" Sizzle, Sizzle, Fry, Fry ..... fortunately, I found a European one at a shop in Budapest to replace it.
I wouldn't write off the voltage flexibility of the old laptop power adapter. Check before spending money.
I use an antique Dell laptop, this one born in 2017. I just had a look at the brick and in teeny tiny print I see that it is 100-240v 50/60 Hz so I could travel all over the world with nary a concern other than the shape of the plug.
Yours may be too. Have a look, magnifying glass or close up photo helps. Your iPhone is newer than mine and everything is highly likely to work too. Just need plug adapters. If you have anything like modern Apple chargers they will be fine. Read the label.
I would recommend taking a Universal multi-port charger with European plugs - mine has three USB-A ports and three US-C ports. It is not a charging issue, it is a "How many convenient outlets do I have?" issue. Have fun.
