noeifevo 43 8v 10a lifepo4 batterieladegerat fur 12s 38 4v lifepo4 lithiumbatterie led anzeige aluminiumgehauseDue to some batteries with M25 charging connectors that have integrated charging protocols, our charger cannot support batteries with built in charging protocols. Please confirm with the battery supplier before purchase 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 need a different polarity, please let us know. Contact options: You can reach