I plan on using several Blackberry chargers and some that are for USB charging. Some have a direct micro-USB cord attached, and others have a regular USB outlet and you use your own USB cable. They all seem to say 100-240V 50/60Hz on them. They range from about 1000 mA to 2100 mA.
I will use them to charge a Phone, Kindle, backup-battery powerbank. The chargers look like these (one is Playbook rated at 2.1A, and the other which has a USB 5V is rated at 1A):
I've also got something that looks like this... a bit cheaper quality but hopefully still ok:
I guess as long as I draw about 2A (some will do 2.1 A so hopefully that is not overloading the adapter) then I am safe to simply use the small black adapter (the first picture I showed)?
I also have one of these Blackberry micro USB chargers where the plug end can be changed from US/Canada to European (there are 2 plugs provided which clips in and out):
Since most of my devices accept the micro USB anyways, I can use that to charge the Kindle, phone or powerbanks as needed and it is built for European plug. Hopefully it will fit into the Israeli outlet.
As far as shaving, brushing, etc.... I am planning to use old-fashion blades and regular brush. One thing I know is a definite NO-NO is to make sure my wife does NOT take her hair-dryer with her. Usually she doesn't because most hotels have them anyways. They usually draw much higher wattage, so would melt the little black power adapter above. Same goes for the autotransformer (which I am thinking more and more that I probably don't need... since all my charger adapters seem to accept 100-240V 50/60Hz - and it's only 50 W rated anyways).
Would it be advisable to plug the auto-transformer in the wall, then plug in my North American chargers that are say higher than 2A rated (even if they can accept 110-240V 50/60Hz) simply to make sure I don't melt the smaller black plug adapter? Then I'm using the autotransformer in a sense as a beefier adapter from the 2-prong round plug to the 2-prong flat plug and it just so happens to also step down the voltage. I know it provides no extra protection and stepping down the voltage won't be needed, but physically it will still let me connect to the Euro plug and if my device/charger is say able to output 3 A at 5V, then it is using 15 Watts and if you are saying the simple black adapter will not handle more than 2 A (or 2.1 A), then the autotransformer will tolerate it fine?
If I can, I will just use the adapters that have the 100-240V input range that are 2.1 A or below, with the simpler black plug adapters. By the way, just because it says 2.1 A rated doesn't mean the device it is plugged into is drawing that current, right? For example, using the 2.1 A 5V Playbook charger on my Kindle, it will not be anywhere close to 2.1 A as the Kindle needs very little current to charge. Even the powerbank charger has 2 USB ports and is rated 2.1 A, but each powerbank itself has input max 1000 mA 5V only, so technically the charger shouldn't ever draw more than 2 A, even with both powerbanks plugged in. And in the case of charging one powerbank, a single USB is being used on the adapter so it should only be drawing 1000 mA max because the powerbank can't be fast-charged, it will limit itself to 1000 mA no matter what.