Omission on my part, I should have cautioned you about the 110volt issue for items sourced from the US. Glad that you remembered/noticed
The 220v to 11v convertor/adapter should be available in any shop that sells electronics parts/spares. There is nothing wrong with keeping stuff uncharged for a while, as these items are shipped from the factory with the expectation that they may not be charged for a while.
The MOST important thing is to seek the help of local fliers when you try to maiden the plane.