CTEK (56-830) MURS 7.0 US 12 Volt/16 Volt Fully Automatic 7 Step Performance Battery Charger Fully automatic 7 step patented program tests battery condition and revives, charges and maintains to ensure maximum battery life and performance Provides performance charging in both 12 Volt and 16 Volt applications Water resistant so the charger can be taken to the problem evenif it rains or snows No sparks, short-circuit proof and reverse polarity protected makes it safe for all the vehicles electronics and easy to use Water and dust resistant means it is safe to use in all climate situations