features for dc to DC chargers

pianotuna wrote:
What features should one look for in such a device?

• Wide input voltage range (maybe 11.0V - 15.0V)
• Programable for multiple battery types (flooded lead acid, AGM, LiFePO4 and ?)


Bonus (low priority) would be a way to use the RV battery to boost the engine start battery, but that would have to go through the fuse in the vehicle so that would be the limitation.