Today we're going to take a look at the CTEKD250S dual 12 volt battery charger with the smart pass enhancement. This is for multiple 12 volt DC power sources. This 2 unit battery charging system will offer a high level of versatility. Uses DC input power to charge 12 volt batteries. It is designed for situation where the 110 volt AC power is unavailable. This synchronizes the DC power input from… see more >