Top 10 Best Battery Tender 4 Amp

AUTOMOTIVE COMPATIBILITY First fully automatic, constant current charger designed to charge and maintain up to five 6v or 12v batteries at once to power your cars, SUVs, pickup trucks, and even boats. Automatically switches to floatmaintenance voltage after fully charging the battery. CONNECT AND FORGET Cutting edge Battery Management System technology automates the charge for your vehicles by fully charging your battery, then goes into floatTo avoid dangerous dead-short sparking, microchip circuitry will not activate output voltage until clips are correctly connected to battery. MONITOR POWER LEVELS A solid state two-color LED light indicates the charging status and if the battery voltage drops too far under load, ISM adaptive charging will resume full charger output power. SAFE AND SECURE Our multiple port 12v battery charger bank is spark proof during lead connection and automatically detects reverse polarity via microchip to ensure a correct connection before providing power. 3 Year Industry Leading Warranty.

STAY CHARGED The 4 amp car battery charger automotive provides a full charge to your machine's battery before automatically switching to float mode to maintain proper voltage levels for your battery without overcharging. FULLY SELECTABLE With the push of a button, easily switch from AGM or flooded and lithium ion LiFePO4 batteries to provide and maintain an optimal charge level for 6 and 12 volt batteries alike. HIGH POWERED 4 amp switchable car battery charger automotive delivers a powerful charge to keep your car, SUV, pickup truck, or boat battery at peak performance by providing reliable engine starts and extended battery life. EASY TO USE A low maintenance design that's quick and simple to use, our switchable automobile charger and maintainer is compact and lightweight to operate everywhere, even in small storage spaces. SAFE AND SECURE Our car battery charger automotive and maintainer is spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power. 5 Year Industry Leading Warranty.

STAY CHARGED The 3 amp car battery charger automotive provides a full charge to your car, SUV, or truck battery before switching to float mode to maintain proper voltage levels without overcharging or damaging the battery. ELITE VERSATILITY Our car battery charger automotive is compatible with lead-acid, flooded or sealed maintenance free batteries AGM and gel cell and allows you to recharge 6 or 12 volt batteries with the push of a button. HIGH POWERED This three amp car battery automotive charger delivers a powerful electronic charge to keep your vehicle running at peak performance by providing stronger, more reliable engine starts and extended battery life. EASY TO USE A low maintenance design that's quick and simple to use, our switchable automobile charger and maintainer is compact and lightweight to operate everywhere, even in small storage spaces. SAFE AND SECURE Our car battery charger automotive and maintainer is spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power. 5 Year Industry Leading Warranty.

Meet the GENIUS5 - It's the all-in-one solution - battery charger, battery maintainer, trickle charger, plus battery desulfator.. Do more with Genius - Designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries.. Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.. Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.. Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.. Beyond maintenance - It's not just a trickle charger, it's an advanced battery maintainer. A fully-automatic, worry-free battery charger for everyday use - 247 - with zero overcharge.. Compatible with all types of vehicles - charge and maintain cars, motorcycles, lawn mowers, ATVs, lawn tractors, trucks, SUVs, boats, PWCs, classic cars, and more..

4 amp battery chargermaintainer is compatible with any AGM, GEL, or WET automotive or marine 12V battery. Fully automatic high frequency charging Offers 2 ways to connect powder coated battery clamps or battery terminal rings. Features an IP67 rating which certifies a completely sealed, waterproof and dust proof housing capable of withstanding direct water or rain exposure. Built-in circuit protection guards against overcharging, reverse polarity, and short circuiting ETL Certified for performance and safety. Equipped with mounting holes and detachable, 360 degree rotating hook.

Meet the all-new GENIUS2X2 - a two-bank battery charger, battery maintainer, trickle charger, and battery desulfator - the perfect all-in-one solution for battery maintenance.. Multiple banks - A two-bank battery charger maintainer rated a 4-amps - 2-amps per bank - designed to charge and maintain multiple vehicles like cars, motorcycles, boats, ATVs, RVs, lawn mowers, lawn tractors, trucks, and more.. Do more with Genius - Designed for 6-volt and 12-volt lead-acid automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free, plus lithium-ion batteries.. Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.. Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.. Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.. Beyond maintenance - It's not just a trickle charger, it's an advanced battery maintainer. A fully-automatic, worry-free battery charger for everyday use - 247 - with zero overcharge..

BATTERY CHARGER, MAINTAINER DESULFATOR --IT IS NOT A CAR JUMP STARTER. GOOLOO S4 is an all-weather battery charger, battery maintainer, battery desulfator, works excellently with all 6volt and 12 volt lead-acid locomotive batteries like WET, SLA, GEL, AGM, FLOODED, VRLA batteries and 12volt LiFePO4 batteries.. OPTIMIZING BATTERY PRECISELY-- An 10-stage charging program automatically analyze battery sulfation problem, repair and pulse current charging devulcanize battery to restore the battery lost performance , compensation charging maintain the battery and ensure optimal performance without overcharging.. PLUG TO PLAY-- GOOLOO S4 comes with an easy-to-follow LCD display showing charging voltage, charging mode, battery charging bar and battery levels. Built-in auto memory keeper allows for returning to the last charge mode when connected. Just connect the corresponding poles, press the button to select the mode, and forget.. TOTAL PROTECTION-- GOOLOO S4 smart battery charger comes multiple safety features to ensure maximum safety during use. It offers short circuit protection, overload protection, low-voltage protection, high-voltage protection, overcharge protection, over-temperature protection, reverse-connection protection, and over-current protection. It's got IP65 protection which means you can use it anywhere with an outlet.. VERSATILE DESIGN-- GOOLOO S4 smart battery charger and maintainer can also be used as a DC power supply for powering some of the 12V DC devices 5-14 volt, 3A MAX CURRENT or as a memory keeper when replacing a battery. The convenient hooks for easy hanging on the wall, and weigh only 0.6kg 1.3lbs.. AUTO REPAIR WHEN CONNECTED--The auto repair mode is suitable for topping off stored batteries between uses so that they are always ready to go when you are. Note It may not be possible to repair a deep-discharged battery.. CHARGING PEAK CURRENT--It supplies 4A current for charging up to 100AH 12V lead-acid batteries, and 2A current for up to 30AH 6V lead-acid batteries.. TROUBLESHOOTING GUIDE--If you ever troubled with our smart battery charger, please kindly find our Troubleshooting Guide Manual ON the product information page, below the technical details and download it for a referrence..

INTELLIGENT SAFE CHARGING- Fully automatic battery charger, 8-stages automatic charging process, monitor the whole charging progress, stop automatically when the battery is fully charged. Automatically detects battery sulfation and acid stratification, desulfate and charge the battery quickly. Smart trickle charge to restore lost battery performance and extendes battery life, perfect for year-round battery maintenance or long-term storage. WIDE APPLICATION FAST CHARGING- Designed for 6v12v lead-acid automotive, marine, and deep-cycle batteries within 4-120Ah, including flooded, gel, AGM, and maintenance-free, plus LiFePO4 batteriesonly 12 FTP mode. SUHU battery maintainer and charger is a great choice for cars, motorcycles, lawn mowers, ATVs, lawn tractors, trucks, SUVs, boats, and more. Also used as trickle battery charger. Upgraded 50A fuse on ring connector. LCD SCREEN EASY TO USE- the battery charger clearly and visibly shows LCD screen displays charging and battery status, charging mode, battery type and more. simple operation and a bright, easy to read display. it also automatically detects sulfated batteries and attempts to repair them by any chance. MULTI SAFETY PROTECTIONS- Avoid overcharge and discharge, extend battery life, adopt ABS flame-retardant shell, fireproof, electric shock, Built in circuit protection guards against reverse polarity, over-current, overload protection, over-voltage, over-charge and more protection. After testing, it has proved its stable performance, suitable for year-round battery maintenance or long-term storage. Robust Quality and Service- SUHU 612V 4A automotive battery chargermaintainer in order to save batteries and have them be ready when you use them again. We are always standing by your side and ready to help you. Any questions, please feel free to contact us by email.

MULTI-PURPOSES BATTERY CHARGER6V and 12V PbSLAVRLAGELAGM lead acid battery charger tender, operated with vulcanization function, Adakiit battery maintainer charger is a great choice for lawn mower, boat, car, motorcycle, ATV, scooter, snowmobile, trucks small, electric vehicle, electric tools, etc. 4-120AhUsed as Trickle Battery Charger as well.UPGRADED WITH 50A FUSE ONTO RING CONNECTORS. 8-STAGE SMART CHARGING - FULLY AUTOMATIC BATTERY CHARGER8-stages automatic charging process Diagnosis - Desulfation - SoftStart - BulkCharge - Absorbtion - TestMode - Recondition - Float by MCU controller,255075100 to indicate quantity of electricity and monitor the whole charging progress.Stop automatically when the battery is fully charged.Perfect for year-round battery maintenance or long-term storage for improved performance and longevity.. INTUITIVE LCD SCREEN INTELLIGENT DETECTIONThe battery charger maintainer provides you status of the charging directly and diagnostic information, even when in maintenance mode.LCD screen displays charging voltagecurrent, charging mode, battery type and percentage of power remaining. When the charger is turned on, it restores the last settings used, making your life easier. It also automatically detects sulfated batteries and attempts to repair them if possible. MULTI SAFETY PROTECTIONS - BATTERY RESCUE RECOVERThis battery charger offers multi protection against Reverse Polarity, Short Circuit, Over VoltageCurrent, Over ChargeDischarge, Overload, Overheat features Constant Pulse Current Maintenance function to avoid overcharge and discharge Full-loaded and burn-in test prove its high reliable efficiency, stable performance. QUALIRY ENSURANCE Battery Maintainer- Updated with battery condition diagnose to detect the defective battery before charge and 72-hour safety features, just get portable 6v 12v trickle charger for car batteries with confidence Adakiit smart battery charger offer 2-Year quality assurance 12-Month refund timely after-sale services..

Compatibility 6, 8, 12 Volt Lead Acid, AGM Gel-Cell 4 cell Lithium IonGreen Battery Chemistries. ULCSA listed, no spark charging, reverse battery protection, 10x -4feet output leads with redblack battery clamps. 2x LED's per channel, LCD Input 100-240Vac, 5060Hz worldwide universal input. Output 2Vdc to 15Vdc, 500mAdc per channel. 1inx3in214in 2.5 x 7.62x 35.8cm. 3.76lbs 1.71kg.