Can the Genius battery management system be used with lithium batteries?

The Genius is not compatible with lithium batteries.

The charge profile and timing within the Genius is programmed for lead acid batteries only.

The J35B-L or J35D are compatible with lithium LiFePO4 batteries in Jayco caravans, and the BatteryPlus35-II-HA is compatible with lithium LiFePO4 batteries in non-Jayco caravans.