MOTORCYCLE BATTERY OKYAMI YB10L-BP 12V - 11Ah
Acid caution not included

possibility to buy it through this link:
http://www.ebay.it/itm/ACIDO-PER-BATTERIA-/251096414227?pt=Ricambi_e_Accessori_Moto&hash=item3a76833813
German version: OKYAMI BATTERIES YB10L-BP 12V - 11Ah