WirthCo 20067 Battery Doctor Black CEC Certified Rainproof Battery Charger and Maintainer (6V to 12V, 2 Amp) 5 - Stage 6 - 12 Volt Smart Charger Technology Prevents Overcharging Smart "Automatic Switching Technology" can be safely connected to the vehicle for long periods of time IP65 Water Resistant Molded Case Reverse Hook-Up Protection which is Spark Resistant Includes Alligator Clips and Ring Terminals