How do I use lithium batteries with the Schneider Electric 865-4048 Conext SW Inverter/Charger? Posted by Frank Molina, Stellavolta on Jun 2nd 2020 Select custom battery type for lithium batteries. You'll then see a separate submenu where you can custom program the inverter per the manufacturer's battery specifications. You don't need the the lithium batteries custom battery settings schneider electric 865-4048 Conext SW custom battery type Lithium Ion Application Note Document Number: 976-0319-01-01