http://www.philips.co.uk/c/convenience-home-lighting-accessories/convenience-6915130ph/prd/

Didn't see on the link.
3.7 volts at 90 ma is 333 ma.
Does this plug into 220 volts?
Your replacement can be 330 ma or more.
The end needs to match and polarity need to be verified(Tip Positive/Negative?)

It plugs into 230 volt. One end must be a mini usb plug.Have you any idea where to buy such an adadpter.

I have a drawer with several hundred, will try to look through later, I have gotten lucky with eBay,
Can you tell the Make and model Phone? This is for?

It's is not for a phone but for a convenience readinglight from Philips, article number 6915130PH.