Charging in Jamaica
I am struggling to find out what charger we need for iPhone and watch in Jamaica. Their website says same as USA, but need three prong.
Anyone know what I need?
Apple Watch Series 4, watchOS 7
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Go to a store that supplies travel adapters (I have seen these in department stores as well as AAA offices in the USA) and get one that fits your plug to a Jamaican socket. The actual voltage is adjusted by the Apple charger so you just need the plug to fit.
See also: http://www.apple.com/shop/product/MD837AM/A/apple-world-travel-adapter-kit
About Apple World Travel Adapter Kit - https://support.apple.com/en-us/HT202114
Modern chargers adapt automatically to most international voltages in the 100-240V range. If you wish to confirm this for your charger most have voltage ranges embossed in tiny letters on the back. You may need a plug adapter to actually fit your plug to whatever they use in the country you are visiting. Sometimes those are easily found in stores in the country you are visiting or you may wish to buy one in advance online or in a store selling travel supplies.
Something else I find handy is an extension cord since I often have to charge multiple items overnight. I have also found that sometimes the nearest outlet is across the room from where I want to use a device. If you get one in the your country of residence you only need a single plug adapter because you have multiple outlets on the strip. Just make sure you get one suited to the power supply of the country you are visiting since many other countries use 220V.
Your only concern may be if you are traveling to a location with an "unclean" electrical supply and if voltage spikes are an issue. If that is the case you can investigate purchasing a surge protector to protect your device.