There are several issues to consider. The first is mechanical. That is, will the prongs of charger plug fit into a wall socket in the country you’re visiting. The next issue is electrical. That is, is there a match between the electrical requirements of the battery charger and electricity supplied in the hosting country?
Ensure you are aware of the electrical requirements in the country you are going to.
You will want to look at the input voltage specified on the label on the battery charger. If it says the input voltage is 100 to 200 volts, that charger will work in any foreign country electrically.
If you need a converter
VidaCura offers the 260-1244xx international adapter which will satisfy most requirements.