I bought a Gameboy advance off Ebay about 3 months ago and after wearing out loads of batteries I decided it was costing too much and it would be much better to run it off electricity so I looked around for a charger and arrived here on Amazon.
The charger I was sent first had a connection that was too big for the Gameboy's socket. So I got onto the company, they called me and the guy said he'd send out another charger. That one's connector was far too small! I was sent a third charger and this also had a connector that was much too small for my Gameboy. Details of the chargers I received are an NDS, NDSI and NDS Lite. I sent all the chargers back for free (refund pending) but I would avoid the hassle and look elsewhere if I was you. Now I must state that I have an original Gameboy advance and not a Gameboy advance SP so the charger may work for that I don't know.
It is very disappointing because the description says Gameboy advance GBA SP it does not say that it is unsuitable for original Gameboy advances. The man said he sends these chargers out for Gameboy advance daily and there's not a problem but if you have Gameboy advance normal edition then take heed and stay away. From my experience this charger/chargers is/are a waste of time!