noeifevo 62 9 v 4 a 17s lithium batterieladegerat ausgangsspannung 71 4 v led anzeige fur e bike roller boot und autoAs some batteries with an M25 charging connector are equipped with integrated charging protocols, our charger does not support these batteries. Please check with the battery manufacturer before purchase 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 let us know. Contact options: You can reach us