hello scooter friends, I have a problem with the charge of the battery at my rex scooter rs-450 from ca. 2008 . I drive almost exclusively with standing light , use every eye view in which I can drive without light , on the garage grounds or parking spaces to keep the battery as full as possible . I have charged them before 2 tank fillings , i.e. about 200km and about a month over an external , very good charger and now the battery is again so empty that the scooter with the e-s I checked the charge when the engine is running on the battery about 13V, that is, it definitely takes place a charge. someone knows the problem, can’t imagine it’s the battery somehow. it keeps the voltage very well over the mentioned period. mfg