You have several choices available to get your NDS battery charged. The best solution is to use a $4.99 Multivolt AC Adapter, which just replaces the one that comes with your NDS ( for Europe or UK, see more options at the Nintendo DS Accessories news article). You could also use a USB Charger ( $4.95) cable, the 12V Car Adapter ( $6.99) or any other accessory that works with the Gameboy Advance SP, since the Nintendo DS is compatible with the power supplies of the GBA SP.
Voilà l´article en question, et c´est la dernière phrase qui m´inquiete car il parle qu´ils faut que les consoles soient compatibles.
De plus, je n´ai trouvé aucun article où il est expliqué le test d´un chargeur SP européen avec une NDS US/Jap.
Si quelqu´un à un lien, merci de le poster.