Help with o-like charger

Hopefully someone can help me with my noobishness!lol,
I have just got my o-like 200mw red pointer with charger and batteries.
I have a plug adapter from uk 3 pin to a charger style plug. I have took this apart and it literally just adapts the pins. The two pin charger plug fits in but will it be safe? i don't know how these things work but im sure that uk volts is over 200 and eu is 110?would this fry the charger and batteries? also do the batteries come fully charged?
any help appreciated,
Dave

Read the back of the Charger...
Read the allowable input Voltage..

Most Chargers and Wall Adapters today are the switching
electronics variety and have a universal input voltage of
aprox. 100Vac to 240Vac..


Jerry

see thats the thing, the charger has no writing on it at all. It has some japanese symbols on the front but id like to bet they say the type of batteries to be used and not input voltage.
idk i just don't wanna kill my batteries really.
thanks for your reply,
Dave