Yuasa rec series valve regulated lead acid batteries yuasa rec50 12non fr the yuasa rec50 12 is a deep cycle cyclic valve regulated lead acid 12v battery from the rec series the sla 12v 50ah battery utilises the latest advanced design oxygen recombination technology it is equipped with a simple safe low pressure venting system which releases excess gas and automatically reseals should there be a build up of gas within the battery due to severe overcharge the battery has been manufactured