Charging options for 5d mk II when travelling to US from Europe

Hi everyone,

I'm planning on buying a 5D MkII very soon to take with me on honeymoon.

What I'm trying to find out is whether the supplied charger is dual voltage and I just need to get myself the right cable to connect from a US power socket to the charger itself, or if I need to buy myself a specific US charger.

Looking at the product brochure (the joint 50D / 5D Mk II one from Canon UK's website) it appears to list a battery charger LC-E6 and an LC-E6E but it's not clear what the actual difference is between the two.

can anyone enlighten me?

thanks