WirthCo 20062 Battery Doctor Black CEC Certified Smart Battery Charger and Maintainer (12V, 500 m AMP) 3 - 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 Direct Wall Plug-In design keeps the work area clutter free Reverse Hook-Up Protection which is Spark Resistant Includes Alligator Clips and Ring Terminals