noeifevo 58 4 v 5 a lithium batterieladegerat fur 51 2 v 16s batterie automatische abschaltung elektro scooter motorrad mit kuhlventilatorDue to some batteries with M25 charging connectors that are equipped with integrated charging protocols, our charger does not support these batteries. Please inquire with the battery manufacturer before purchase to confirm if the battery has an integrated charging protocol. For M25 (2+1+5) and M25 (2+4), the standard polarity is 1+ for positive and 2 for negative. If you require a different polarity, please let us know. Contact options: You can reach