> It’s important that the charger accepts an IEC C7 cable. This is an international standard, so you’ll be able to find local mains cables at office supply stores or borrow them from nearby appliances, and it’s a two-pin design. Having a two-pin mains lead means you don’t have to worry about finding three-pin (earthed) power outlets in areas where they are not yet universal. It also means that an ultra-compact travel adapter like the Road Warrior can serve as a backup option if you don’t have a local cable.
An earthed-to-unearthed adapter (preferably with some alternate path to ground) seems like a better solution there than restricting oneself to C7 and its 2.5A max current. And when the ground prong is available in the outlet, it's often a useful mitigation against the looseness of worn-out sockets (since it adds another area of support).