TecMate OptiMate DC to DC TM500, 6-stage encapsulated battery-saving 12V/12.8V 2A DC/DC charger and maintenance device

will this charger allow the battery being charged to back feed to the charging battery? I want to use it to charge a battery mounted on a trailer .

Can I use Led acid to charge lithium?

Will this charger attain a higher output voltage than it's power source?

See that it is stated for use with lower AH batteries. I’m looking to charge 110ah batteries with no more than 20% discharge. May this work?