I’ve just recieved my new charger sent for free by Geekbuying.
And…
My two batteries are now fully charged !!!! YES !
So this is the answer i was looking for :
In good working use, you have to first plug the charger to the battery, and then plug the charger to the power supply.
# Then the led lights to green.
# After a few seconds, the charger detects that the battery is not fully charged, and the light turns red (permanent, not blinking).
# When the battery is fully charged, the led turns green permanent.
My broken charger make a little sound, like an electrical relay which close or can’t close at the moment it should turn to red (step 2). But the charger is not demountable, so i can’t do anything…
A new charger is not so expensive and you could find one on Ali express
https://fr.aliexpress.com/item/S2-6-5AH-e-twow-S2-e-twow-electric-scooter-specification/2048119027.html?src=google&albslr=221617459&src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&albcp=1706977641&albag=66909914152&trgt=310549338888&crea=fr2048119027&netw=u&device=c&gclid=COnb-sCf2OICFXAA0wod9fkJAA&gclsrc=aw.ds
The 220v wire has a type of plug very common in CEE on charger side (like a radio), so even if you find only a UK version of the charger, you’ll easily find a french version of the plug
https://www.ledkia.com/fr/acheter-blocs-multiprises/5465-cable-d-alimentation-europeen-cee-716-c7-1-metre-fiche-arriere-a-2-broches.html?gclid=CNzQurKg2OICFQtB0wodP3IAuw
In fact, ++Carmello Castellano in his comment on 7 march had given the answer… Thank you !++