noeifevo 12 6v 5a 6a 7a 8a 10a lithium charger for 3s 11 1v li ion lipo batteries cooling fan automatic shutdown redDue 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 whether the battery has an integrated charging protocol before purchasing. 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