It depends on your charger. Find what voltage it supports. This will be on the wall wart, if it has one, or on the charger itself. It will say something like input 100 - 240V. If it says it is good for 240 you are good to go, almost. The wall outlets are different and US stuff will not plug in but all you need is a fairly cheap adapter that you plug into one side and the other goes in the wall.
If the input does not go to 240 do NOT plug it in. It will probably fry the charger. Check this for ALL the stuff you want to plug in. If you have something that does not like 240 you have two options. One is to get a voltage converter, can be fairly expensive, and the other is to
buy whatever you need to run on 240, if it is just a charger it might be cheaper to get a new charger than a voltage converter.
One trick I use is to us a single adapter and plug an extension cord in and then I can plug a couple of us things in the other end.
Have fun in Germany.