WirthCo 20068 Battery Doctor Black CEC Certified Smart Battery Charger and Maintainer (12V to 24V, 4 Amp to 8 Amp) 5 - Stage 12 - 24 Volt Smart Charger Technology Prevents Overcharging Smart "Automatic Switching Technology" can be safely connected to the vehicle for long periods of time Digital LED Display that shows voltage, amperage and battery charge percentage Reverse Hook-Up Protection which is Spark Resistant Includes Alligator Clips for Easy Attachment to Battery