Battery to battery (B2B) chargers or also known as DC-DC chargers are now one of the most popular and recommended options for charging a leisure battery in all modern euro 5/6 vehicles with stop start, smart alternators or ECU controlled charging systems.

They can also be used in any older vehicles wanting a better quality leisure battery charging system giving you a much faster charge and higher capacity than a standard split charge system using a relay will achieve.

A DC-DC charger can be multi voltage to charge a 12v battery bank from a 24v vehicle like commercial veicles,race vans and horse boxes or charge a 24v battery bank from a 12v vehicle 

Battery to battery chargers can be set up for all battery types so are the best option fo charging AGM, Gel or Lithium LiFeP04 type batteries to ensure they are charged at the correct voltage and faster up to a full capacity.