Deltec N120EU battery is a popular size in european trucks with commerical starting engine use. It’s recommended that you always replace both batteries at the same time in applications that utilise a twin battery setup. 12v and 24v twin setups must have both batteries changed at the same time due to the fact that if you change only one battery it creates alot of stress on the new one and very often it’ll fail premature. Advanced Calcium lead acid battery plates are used to enhance reliability because modern tech alternators charge at higher voltages. Hassle free maintenance free design means simply just install and keep an eye service to service on alternator charge rates. There is no need to check for acid and water levels. Some applications may see high vibration conditions which have been taken into consideration which is why the Deltec batteries series are built with SMF X-Frame Plus technology with a Advanced Grid Structure to add robust strength. X-Frame Plus technology delivers higher corrosion resistance to enhance the battery lifespan and performance for superior starting power. The advanced grid design allows maximum current flow to accept charge faster then traditional batteries aswell as increasing conductivity. 
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