noeifevo 37 8v 2a lithium ladegerat fur 9s 33 3v li ion lipo batterien mit lcd anzeige 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 require a different polarization, please let us know. Contact options: