noeifevo 33 6v 10a lithium batterieladegerat fur 29 6v 8s batterie automatische abschaltung aluminiumgehause mit lufterSince some batteries with an M25 charging connector have integrated charging protocols, our charger does not support these batteries. Please check with the battery manufacturer before purchasing to confirm whether 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 inform us. Contact options: You can reach us online or