Add-A-Battery7650The 7650 Add-a-Battery simplifies switching and automates charging for a complete two battery bank management solution.A complete two battery bank management solutionDual Circuit Plus™ Battery Switch isolates engine and house circuits, and combines battery banks for emergency startingThe 120 Amp SI ACR automatic charging relay combines for chargingWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.