Battery Charger Automotive Trickle Charger Battery Maintainer, TOPDON T4000 4A/1A for 6V/12V Lead-Acid/Lithium ion Batteries Auto Smart Battery Desulfator with Temperature Compensation AGM Deep Cycle - USAU66-48-79

• 【Choose From 6 Improved Functions & A Wide Range of Applications】Six newly upgraded features make our TOPDON TORNADO 4A battery charger compatible with all 6V and 12V lead-acid batteries and 12V lithium batteries. This car battery charger can be used for cars, trucks, SUVs, PWCs, motorcycles, scooters, ATVs, lawnmowers, RVs, boats, and other devices in your home. The battery charger with a maximum 4A current supports a battery capacity range of 5-120Ah. 【Trickle Charger Mode Protects Batteries】The TOPDON Smart Car Battery Charger is not only a battery charger, but also an advanced battery maintainer, trickle charger, and battery desulfator! This battery tool automatically detects battery sulfation and acid stratification and uses a pulse repair function to restore lost battery performance, making engine starts more powerful while extending battery life. The tool's Supply Mode can even recharge dead batteries! 【Memory Mode & One-Button Charging】 The newly upgraded memory mode allows you to pick up where you left off after an accidental power failure. The battery charger will automatically resume charging on the mode you ran the last time you charged and continue to run to charge your battery. The new plug-and-charge and one-button design are easy to use and charge at the touch of a button. 【Safety Above Everything】 Premium copper clamps are built with user safety in mind through spark-free operation and reverse polarity protection. The TOPDON battery charger’s built-in circuit protection guards against reverse polarity, sparks, overcharging, over-current, open circuits, short-circuits and overheating.The IP65-rated ABS shell housing seals the internal hardware from dust, dirt, and water. A 6ft power cable and 8ft battery clamp cables allow for extended reach. 【Hassle-Free After-Sales Service】TOPDON’s T4000 comes with the battery charger, smart battery clamps, eyelets, and a user manual. TOPDON provides a hassle-free warranty plan with the tool: 3 years of quality assurance, a 30-day free refund window, and a lifetime of free technical support. TOPDON offers customer support over the phone or on Facebook Monday through Friday. Search “TOPDON Official” and contact us via direct message, or call our tech support line at 833-629-4832.