noeifevo 43 8v 4a lifepo4 batterie ladegerat fur 12s 36v 38 4v lifepo4 batterie kuhlventilator automatischer abschaltungDue 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 purchasing whether the battery has an integrated charging protocol. For M25 (2+1+5) and M25 (2+4), the standard polarization is 1+ for positive and 2 for negative. If you need a different polarization, please let us know. Contact options: You