When comparing 110V with 220V AC inputs, you have to keep in mind that they both essentially do the same thing. That is, they produce power to operate electrical outlets. What’s important to know is that different countries run on different voltages. If you’re located in the US or Canada, your home is wired for 110-120 VAC, and as a result you’ll need to make sure that you choose a battery charger rated for 110-120 VAC, 60 Hertz (Hz) input. If you’re located in an international country (South America, Europe, Asia, etc.), they run on 220V, so you’ll need a battery charger rated for 100-230 VAC, 50-60 Hertz (Hz) input.