Save time packing power equipment for your phone or laptop,  but two identical adapters or consider an iGo as your traveling companion.  I have an iGo tip set that I keep in my car and one that I carry with me to charge my laptop, phone, and a variety of accessories such as Bluetooth headset, wireless headphones and more.
Benefits to you:  Never run out of battery power while you’re on the go and no more running home or to work to use that charger!