noeifevo 74v 5a 20s lithium batterieladegerat ausgangsspannung 84v led anzeige fur e bike roller boot und autoSince 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 is equipped with an integrated charging protocol. For M25 (2+1+5) and M25 (2+4), the standard polarity is pin 1+ for positive and pin 2 for negative. If you require a different polarity, please inform us. Contact options: You can