ERAYAK 6V/12V 4A Automatic Battery Car Charger Maintainer for 100Ah Lead-acid Battery,All types of ATV,lawn mower,motorcycle,automotive,marine,RV,power sport,lawn&garden,AGM,gel cell batteries-C9304 SMART 6V/12V 4 AMP BATTERY CHARGER -- Suitable for Most Vehicles ,all Kinds for Automobiles, Motorcycles, ATVs, Personal Watercraft, RVs, Boats, Airplanes, Golf Carts, Back-Up Generator Systems,Emergency Lighting System, Standby Power Supply, Lawn Mowers and More. FULLY AUTOMATIC -- No need of any manual operation, just plug and leave it for charging and maintaining your batteries automatically for long time. The microprocessor controlled program will monitor the whole charging progress and automatically stop when the battery is fully charged. Then it will monitor the battery voltage and maintain the battery with a float charging current. MULTI-LEVEL PROTECTIONS -- Smart circuits engineered with multi-level protections, No worry about overcharge, short circuit and reverse polarity. Spark-free technology applied. Featured Constant Pulse Current Maintenance function helps the battery avoid excessive charge and discharge. It will extend the battery life and recover batteries more effectively. INTUITIVE LED INDICATORS -- Automotive battery charger provide visual state-of-charge feedback and diagnostic information. UNIQUE DSIGN -- Anti-slip & scratch foot pad, durable Aluminum housing but Incredibly lightweight, The DC cord total length of 12ft, Easy to connect anywhere. You will get awesome trickle charger maintainer, one year limited warranty and 100% service, hassle-free return or refund for any product quality issue.