If you are traveling outside of your home country, you should pick up a power adapter kit, so you will be able to plug in your laptop, phone, tablet, etc.
My favorite is the Poweradd Travel Power Adapter Kit, which provides you with two outlets, dual USB ports, and worldwide adapter kits.
It comes with five international plugs: UK (Type G), US (Type B), AU (Type I), EU (Type E/F), JP (Type A) plug.
This makes it great for cross-border traveling, but note that it is not compatible with Italy/Switzerland/Brazil/Chile/South Africa 3-prong outlets.
The adapter comes with a little bag to carry the plugs you are not using, and it’s a small, sleek design.
You’re probably thinking you just need it for your hotel room when you travel, but be sure to keep it in your carry-on luggage, because you will likely want and need it in the airport, as well as on your flight.
In the past year, I went on long flights to and from Singapore and Amsterdam. If I wasn’t able to plug in on the flights, my phone, tablet, and laptop would have been dead when I landed.
Instead, they were all fully charged when I landed.