Best Battery Tender Car Battery Chargers in 2025

Easily charge your USB-connected mobile devices with your 12V battery

Leave connected to your vehicle’s battery via the Quick Disconnect Cable for charging on the go

Designed for use on most 12 volt batteries - motorcycles, golf carts, ATVs, and more

(Safety with ETL Listed): Spark proof during lead connection, reverse polarity protected and includes a 8 foot output cord and 2 year warranty

Perfect for all lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell), also Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode)

Small size 3.9 x 2.4 x 1.25 in and suitable for Most Vehicles: adapts to all kinds of 12V battery for automobiles, motorcycles, ATVs, personal watercraft, RVs, boats, airplanes, golf carts, back-up generator systems lawn mower, etc, batteries using either the ring or alligator connectors, automatically switches to float, maintenance voltage after fully charging the battery

🔥【Charger, Maintainer & Desulfator】 - An all-weather battery charger, battery maintainer, trickle charger, and battery desulfator. Perfect for charging and maintaining all 12-volt lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell). ETL safety standard Listed.

🔥【Automatic Desulfation & Optimization】 - Automatic detection of battery sulfation problem. Applying with pulse current technology to desulfate the batteries effectively. Optimize the battery performance during charging without any manual operation.

🔥【Energy Saving & Spark Free】 - Zero output in standby mode. No battery drain when connecting with the battery. Spark proof during lead connection for safety.

Meet the GENIUS2X4 - A four-bank battery charger for charging multiple batteries. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.

Multiple banks - A four-bank battery charger maintainer rated a 8-amps - 2-amps per bank - designed to charge and maintain multiple vehicles like cars, motorcycles, ATVs, boats, RVs, trucks, lawn mowers, tractors and more.

Do more with Genius - Designed for 6-volt and 12-volt sealed lead-acid automotive, marine, RV, powersport, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free, plus lithium-ion batteries (lifepo4).

(Safety with ETL Listed): Spark proof during lead connection, reverse polarity protected and includes a 8 foot output cord and 2 year warranty

Perfect for all lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell), also Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode)

Small size 3.9 x 2.4 x 1.25 in and suitable for Most Vehicles: adapts to all kinds of 12V battery for automobiles, motorcycles, ATVs, personal watercraft, RVs, boats, airplanes, golf carts, back-up generator systems lawn mower, etc, batteries using either the ring or alligator connectors, automatically switches to float, maintenance voltage after fully charging the battery

【MULTI-PURPOSES BATTERY CHARGER】6V and 12V Pb/SLA/VRLA/GEL/AGM 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.( 4-120Ah)Used as Trickle Battery Charger as well.UPGRADED WITH 50A FUSE ONTO RING CONNECTORS

【8-STAGE SMART CHARGING - FULLY AUTOMATIC BATTERY CHARGER】8-stages automatic charging process [ Diagnosis - Desulfation - SoftStart - BulkCharge - Absorbtion - TestMode - Recondition - Float] by MCU controller,25%/50%/75%/100% 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 DETECTION】The battery charger maintainer provides you status of the charging directly and diagnostic information, even when in maintenance mode.LCD screen displays charging voltage/current, 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

【All in One】- It's the all-in-one solution battery charger, battery maintainer, trickle charger, and battery desulfator. Charge or repair all 6V and 12V lead-acid automotive, marine, and deep-cycle batteries, including Pb, GEL, SLA, VRLA, and AGM lead-acid batteries.

【Superior Safety】- Safely charged, refuses to explode when hot. Built-in safety protection system, and intelligent identification chip, effectively avoid short circuits, over-voltage, over-current, and other safety hazards.

【Portable Design】- Compact and portable designs are easy to carry, the small size of 5.54*2.70*1.55 in and light weight of 0.96 lb can help you save space quickly, which is perfect for toolboxes.

RELIABLE POWER: Delivers 1.5 Amp maintain to car, motorcycle, lawn tractor, and power sport batteries; compatible with standard and AGM batteries

UNDER-THE-HOOD MOUNT: Easily mount the maintainer under the hood of your vehicle for easy access and convenience

SMART CHARGING: Microprocessor-controlled automatic amperage rate adjustment and multi-stage charging for added precision, safety, and battery life

Two battery type options: 12V Lead Acid and 12V Lithium(LiFePO4); Input voltage: 100-120VAC, Output: 12V 2A

Multi-level safety protection: Spark proof, reverse polarity, overcharging, short-circuit, over-temperature, and dust resistance. with bad battery identify and 12V Lithium(LiFePO4) battery low voltage activation function.

Perfect for charging 12V lead-acid, flooded, sealed maintenance free batteries (AGM and gel cell) and 12V-Lithium(LiFePO4) up to 85Ah, Safely maintain types of motorcycle, automotive, marine, RV, Boat, ATV, powersport, lawnmower & garden etc.

√ Perfect for all 12V lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell); It's smart car battery charger for automobiles, automotive, marine, boats, camper, trolling motor, RVs, ATVs, watercraft, powersport, riding lawnmower, lawn tractor, snowmobiles, etc.

√ Safety Guarantee - Multi protection against Reverse polarity/ Short Circuit/ Over Voltage/ Over Current/ Overload/ Overheat; Spark proof during lead connection; Water and dust resistant float charger, full-loaded and burn-in test proves its stable performance and high reliability.

√ 4-Stage Automatic Charging - Features with detachable ring or alligator connectors, charge and maintain your battery wherever you go; the battery maintenance charger monitor the whole charging process, automatically switches to float mode after fully charging the battery by MCU controlled; LST motorcycle battery charger will recover batteries more effectively and extend the battery life.

Charges and maintains 12 volt batteries in most vehicles using 1 Amp rapid charge

Easy connection to vehicle battery using battery clips or O-ring terminals

Stops charging automatically when battery is fully charged or topped off, switching to float mode monitoring

√ Battery and Vehicle Type - Charge fully drained 6V&12V pb/sla/gel/agm/lead-acid batteries, it's automatic battery trickle chargers for automotive, motorcycles, automobile, riding lawn mowers, lawn tractor, ATVs, RVs, watercraft, powersport, scooter, snowmobiles, cars, camper, trolling motor, boats, etc

√ Safety Guarantee - Multi protection against Reverse Polarity, Short Circuit, Over Voltage/Current, Over Charge/Discharge, Overload, Overheat; Spark proof during lead connection; Water and dust resistant float battery charger, full-loaded and burn-in test proves its stable performance and high reliability.

√ 5-Stage Automatic Charging - Featured detachable ring or alligator connectors with 10A fuse, charge and maintain your battery wherever you go; Monitor the whole charging process, automatically switches to float mode after fully charging the battery by MCU controlled; LST motorcycle battery charger will recover batteries more effectively and extend the battery life.

Note: It's a battery maintainer/ trickle charger rather than a jump starter.

[The Newest Arrival of 2022]: With a new industrial design that is more compact, more attractive, and simpler to use than your average car battery charger, Sigma 1 stands out from the crowd. Best of all, it is not only a battery charger, but also a battery maintainer, trickel/floating charger, and battery desulfator. Combined with its pure copper clamp, Sigma 1 offers customers the best charging experience ever.

[Smartest Charger Ever]: HULKMAN's smartest car battery charger yet, the Sigma 1 is built with next-level intelligence. Using its nine-step charging technology, Sigma 1 can now maintain your battery overnight or for an even longer period, with zero attention needed and complete dependability, creating a totally hands-free charging experience.

✅【Safety guarantee】: This intelligent trickle battery charger is designed for automatic charging and maintenance of lead-acid batteries, with multiple protection mechanisms against reverse polarity, short circuit, over voltage/current, over charge/discharge, overload, and overheating to ensure safe and reliable use. The SAE quick disconnect design and safety devices also improve protection measures, making it very safe to use.

✅【5-stage automatic charging】: Unocho trickle charger is equipped with detachable ring or alligator clip connectors with a 10A fuse, allowing you to charge and maintain your battery anywhere. With an MCU chip, it goes through five stages: quality inspection, soft start, bulk charge, absorption, and maintenance phases to charge the battery automatically. The battery maintainer not only protects the battery from damage, but also extends its lifespan, saving you a lot of time.

✅【Easy to use and carry】:The input voltage of the trickle charger is 100-240V, with a small and lightweight design that is easy to carry and store. Once the charger is turned on, the 72-hour safety timer will start counting down. This feature is designed to protect the battery from overcharging. If the battery voltage reaches the appropriate level within 72 hours, the charger will automatically switch to float mode.

√ CHARGE AND MAINTAIN - Charge for all types of 12V lead-acid batteries, including flooded or sealed maintenance free batteries (AGM & gel cell). A smart car battery charger for automotive, motorcycle, marine, RV, Powersport, lawn&garden, children toys, etc.

√ 3-STAGE SMART CHARGING - Fully auto CC-CV(H)-CV(F)charging process, the battery maintenance charger monitor the whole charging process, automatically switches to float mode after fully charging the battery.

√ INTUITIVE LED INDICATORS - With Bi-color LED indicator, CHARGING/FULL light yellow:charging, Green: fully charged/floating; REVERSE POLARITY light red: reverse polarity, provide visual state-of-charge feedback and diagnostic information, even when in maintenance mode.

【Battery Charger, Maintainer & Desulfator】An compact size portable 4 in 1 battery charger, battery maintainer, trickle charger, and battery desulfator. Perfect for all types of 6-volt and 12-volt lead-acid automotive, RV, powersport, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free batteries, suitable for cars, golf carts, motorcycles, boats, lawn mowers, marines, ATVs, UTVs etc.

【Visualized Charging with LCD Screen】The intelligent digital LCD screen clearly and visibly displays the charging status, charging percentage and voltage, charging current, etc. Always know how your battery charging is working.

【Pulse Repair to Restore Your Battery】Built-in advanced battery REPAIR technology, helps to restore the old/idle batteries lost performance and extend battery life. 7-stage charging program (desulfurization, trickle charging, constant current charging, constant voltage charging, battery current detection, compensation charging, Floating charging).

THE LATEST INTELLIGENT CPU CONTROL - Portable battery charger/maintainer automatically adjusts the charge current and maintainability according to the temperature. Automatic ambient temperature detection so that winter can be at full speed and summer is not overloaded. Optimized for any climate, easy to deal with a variety of harsh voltage environments.

HIGHLY COMPATIBLE - Suitable for both 12V and 24V batteries, making it easier to use. It works with Calcium, AGM, EFB, MF, FLOODED, VRLA, SLA, and Wet batteries, meaning that the car battery charger can use for batteries in Car, Truck, Motorcycle, RVs, SUVs, ATVs, golf carts, tricycles, agricultural vehicles, bus, etc. ➤NOTE: LITHIUM BATTERY DISABLED.

PULSE REPAIR FUNCTION - Intelligent control system, robust pulse repair technology, remove vulcanization, repair slightly damaged batteries, reduce water loss, Provides stronger engine starts, and extends battery life. ➤NOTE: It can not activate a dead battery or repair a battery that is damaged seriously; it also can not repair a battery back to 100% new.

[All in One, Keep your battery charged and your car ready to go] Battery Charger automotive 10-Amp 12V and 24V Fully-Automatic Smart, It's smaller but delivers more power. It's the all-in-one solution battery charger, battery maintainer, trickle charger, plus battery desulfator. Charge or repair all 12V and 24V lead-acid automotive, marine, and deep-cycle batteries, including AGM, GEL, SLA, and Flooded in cars, trucks, SUVs, motorcycles, lawnmowers, boats, marine, etc.

[Enjoy Precision Charging, Your car deserves the best] Using a backlit LCD, the battery charger automotive clearly and visibly shows an LCD screen displaying the charging status and battery status; 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.

[Restore your Battery, Don't let a dead battery ruin your plans] Built-in advanced battery REPAIR mode to help to recover old/idle batteries and extend battery life. Please use repair mode if the car battery charger cannot charge the battery. The high-frequency and low-frequency pulse technology has good repair and activation effects. Note: It can not activate a dead battery or repair a damaged battery. LITHIUM BATTERIES ARE NOT ALLOWED

🔋【Charge Your Way, Four Modes for Every Need】①Vehicle Mode: Max power (8.2A, 13.5V) for 85-95AH lead-acid batteries in your vehicle. ②AGM Battery Mode: Pro-level charging (8.2A, 13.5V) for 10-150AH AGM batteries. ③Motorcycle Mode: Smooth ride maintenance (1.45A, 13.5V) for 2-15AH motorcycle batteries. ④Repair Mode: Revive low voltage batteries with a boost (14.9V). Upgrade your charging game with these versatile modes to meet your battery needs.

🔋【Supercharge Your Life with SUHU Battery Charger】Designed for 12V/24V lead-acid batteries, including AGM, EFB, GEL, SLA, and Flooded (WET) types, our SUHU car battery charger is a versatile all-in-one solution. Perfect for cars, trucks, motorcycles, boats, and more, it's the ultimate battery charger automotive and a reliable trickle charger for car battery. Rest easy knowing we offer replacements for any quality issues.

🔋【Smooth Charging】The SUHU trickle charger for car battery offers 8 robust protections for a smooth experience. With a durable ABS shell and built-in circuit protection, this 24V/12V battery charger automotive safeguards against reverse polarity, sparks, overcharging, over-current, open-circuits, short-circuits, and overheating. Enjoy stable performance and peace of mind with its adaptive charging process that automatically stops when your battery is fully charged.

It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator. Designed for 6-volt and 12-volt lead-acid batteries, like WET, SLA, GEL, AGM, FLOODED, VRLA batteries, and more, plus 12volt LiFePO4 batteries.

Auto repair and pulse current charging devulcanize battery to restore the battery lost performance with the GOOLOO 10-stage intelligence charging program, and can charges batteries as low as 3 volt.

Intelligently adapt to different ambient temperatures to eliminate over-charging in hot climates and under-charging in cold climates.

Compatible with all types of vehicles: Charge and Maintain cars, motorcycles, lawnmowers, ATVs, lawn tractors, trucks, SUVs, boats, sport cars, automobiles and more. Charges batteries as low as 2-volt. In Standby mode, the charger is not charging or providing any power to the battery. Once the battery clamps is removed from the battery, standby mode will be activated to avoid electrical shock. Energy Save is activated during this mode, drawing microscopic power from the electrical outlet.

Battery Compatibilities Works with all types of 6-volt and 12-volt lead-acid batteries (Wet, MF, Gel, AGM) automotive, marine, and deep-cycle batteries, including flooded, gel, AGM, and maintenance-free battery. For battery capacity 14Ah-120Ah (3.6A max), and 1.2Ah-14Ah (0.9A low)

Smart Memory Feature: No need to reset the charger if the power goes out while you're charging your battery, the charger will automatically resume charging in the last selected mode. It will automatically stop charging once the battery is fully charged or topped off, switching to trickle charge mode monitoring to maintain the battery. Keep your battery fully charged without worry or overcharge.

[CHARGE AND MAINTAIN]: 12V / 6V 1.5A Battery Charger for 6 volt and 12 volt SLA / VRLA / GEL / AGM / WET Lead Acid batteries.

[WIDELY COMPATIBLE]: Battery maintainer chargers for automotive, motorcycles, automobile, lawn tractor, riding lawn mower, ATVs, RVs, watercraft, powersport, scooter, snowmobiles, camper, trolling motor, boats, etc.

[SAFE AND SECURE]: Certified by ETL, The automatic smart trickle battery tender charger suitable for charging and maintaining Lead Acid batteries automatically, protection against short circuit, over voltage, over current, over charge, overload, overheat and reverse polarity.

【10-AMP QUICK CHARGER】12V 10-Amp and 24V 5-Amp 7-stage quick battery charger, charging speed is much faster than 8-Amp or 5-Amp automatic chargers. Charge or repair all 12-volt and 24volt lead-acid automotive, marine and deep-cycle batteries including AGM, GEL, SLA, Flooded in cars, trucks, SUVs, motorcycles, lawn mowers, boats marine, etc. NEW REPLACEMENT AVAILABLE FOR ANY QUALITY ISSUE.

【8 CHARGING PROTECTION】Smart control, temp compensation in hot climates and under-charging in cold climates, reverse protection, cooling system, overcurrent, fireproof material, overvoltage, short circuit. Trickle charger with multiple protection ensure the safety charging at anytime anywhere. No worries!

【HIGH-EFFICIENCY PULSE REPAIR】Automatically detects battery sulfation and acid stratification, take newest pulse repair function to restore lost battery performance for stronger engine starts and extended battery life. Note: can not activate or charging totally dead batteries.

【UPGRADED DEFECTIVE BATTERY DETECT/FAST CHARGING CAR BATTERY BOOSTER】Updated with battery condition diagnose to detect the defective battery before charge. Input 100-240V AC, With 5A DC output current, BMK 12V 5A car battery charger is suitable for charging batteries with 15-100Ah. NOTE: To better tender the battery, please make sure the battery capacity is higher than 15Ah, it can also charge over 100Ah batteries, just more charging time. ETL Certified for performance and safety

【UPGRADED 72-HOUR SAFETY FEATURES/MULTI SAFETY PROTECTIONS - BATTERY RESCUE & RECOVER】Updated with 72 hours safety feature to commence anytime the charger is onto protect marginal batteries from over charging. Made of high quality ABS, multi-protects of Short Circuit/ OV/ OC/ Overload/ Polarity Reverse, featured with Constant Pulse Current Maintenance function to avoid overcharge and discharge; Full-loaded and burn-in test prove its high reliable efficiency, stable performance

【4-STAGE SMART CHARGING - FULLY AUTOMATIC BOAT BATTERY CHARGER】 12V battery charger operated with 4 stages automatic charging process by MCU controller, 25%/50%/75%/100% to indicate quantity of electricity and monitor the whole charging progress. Stop automatically when the battery is fully charged. LED indicator designed to display different charging status of the 12v smart charger

【Do More with ABLY 10-Amp Battery Charger】Similar to our 8-Amp Battery Charger, Just Better Performance and More Power, Charge or repair all 12V and 24V lead-acid automotive, marine, and deep-cycle batteries, including AGM, GEL, SLA, and Flooded in cars, trucks, SUVs, motorcycles, lawnmowers, boats, marine, etc. ➤NOTE: LITHIUM BATTERY DISABLED.

【All in One Beyond Maintenance】It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, plus battery desulfator. ➤NOTE: If it has been idle for a long time, is old, or cannot be charged, select " REPAIR " mode to try to activate the battery.

【8 Charging Protection】Smart control, temp compensation in hot climates and under-charging in cold climates, reverse protection, cooling system, overcurrent, fireproof material, overvoltage, short circuit. stable performance for longer life. Trickle chargers with multiple protection ensures the safety of charging at anytime anywhere. No worries! ➤NOTE: AC Cable Length: 29.5 inches; DC Cable Length: 21.3 inches.

RESTORE YOUR BATTERY: Our battery charger and maintainer set charges various types of 12V lead-acid batteries, including flooded and sealed maintenance-free batteries such as AGM and gel batteries

WIDE COMPATIBILITY: Our battery charger kit is suitable for charging boats, motorcycles, ATVs, and riding mowers, as well as maintaining car, truck, SUV, and RV batteries, satisfying your different needs for maintaining or restoring lost battery performance

SAFE OPERATION: Fix the battery clamps and plug in the charger to enjoy efficient charging and safe maintenance without worrying about overcharging; its protection system prevents short circuits, overcurrent, overheating, high-voltage spikes, and low-voltage dropouts for maximum safety

6V 12V Automotive Battery Charger: Equipped with 1.5A more powerful current but smaller in size, the 6V 12V smart battery charger can charge and maintain lead-acid batteries, bringing convenience for daily using, carrying and storage.

Charge & Maintain Car Batteries: This fully-automatic 12v battery charger not only can charge all lead-acid automotive, marine, RVs, boats, snowmobile,motorcycles battery, but also can maintain batteries, including all 6V/12V lead-acid/Flooded/GEL/AGM/WET/SLA/Maintenance-free battery automatically. The smart battery charger ensure the maximum capacity and better performance of all lead-acid battery.

Restore Dead Battery: Designed with advanced technology, the intelligent trickle battery charger can charge battery as low as 3-volt and will turn to maintenance mode automatically to protect marginal battery from over-charging benefit from the charger safety feature.

🔋【Multi Modes Battery Charger】- With 6V and 12V and 12V repair 3 charging modes battery charger, trickle charger, plus battery desulfator, deep-cycle, marine, battery maintainer. The auto battery charger is designed for 6V/12V lead-acid batteries, such as flooded (wet), dry charged, maintenance-free batteries, According to the ambient temperature, it charges the battery quickly and accurately. Charges fully then go into float mode, extend battery service life.

🔋【Wide Application】- Works with all types of 6 volt and 12 volt battery capacity sizes 2AH~120AH Pb/SLA/VRLA/GEL/AGM lead-acid batteries, smart car battery charger for cars, trucks, SUV, RV, ATV, lawn mower, boat, motorcycle, electric vehicle, electric tools and for maintain all battery maintainer charger.

🔋【 Multi Safety Protections】- 8 stage chagring protection avoid overcharge and discharge in hot climates and under-charging in cold climates. Built in circuit protection guards against reverse polarity, over-current, overload protection, over-voltage and more protection. Adopt ABS flame-retardant shell, fireproof, electric shock. Our safe and advanced charging technology automatically monitor and maintain your battery, free your worries of misoperation.

✅【Compatible for more batteries type 】 The car battery charger is designed to charge drained 6 Volt and 12 Volt batteries,such as PB/SLA/GEL/AGM/Lead-acid batteries for automobile,motorcycles,lawn mowers,tractor,ATV,RV,watercraft,powersport,scooter,snowmobiles,ride on toy cars,camper,trolling motor,boats,tricycles,onboard battery charger marine and more.

✅【Multi-Function Intelligent Charging】 This smart battery charger owns upgrade 3-stage digital charging program by MCU controller:battery desulfation,soft start charging,bulk charging,absorption charging,battery test,recondition charging,float & battery maintenance charging- Your best car accessories emergency tools to boost the battery performance(Note:It is not a jump starter)

✅【6V/12V Battery Diagnose and Repair】The little handy battery charger tender works as a 6V battery charger, also 12V battery maintenance charger,solve various battery problems;Pulse repair save your loss battery and extend battery life.This compact chargeur batterie is a popular as car battery charger, pedal motorcycle battery charger, boat battery charge,children toy charger,etc.

👍[CHARGE AND MAINTAIN]: 12V / 6V 1.5A smart battery maintainer chargers for 6 volt and 12 volt SLA / VRLA / GEL CELL / AGM / WET Lead Acid batteries.

👍[WIDELY COMPATIBLE]: Battery tender charger for automotive, motorcycles, automobile, lawn tractor, riding lawn mower, ATVs, RVs, watercraft, powersport, scooter, snowmobiles, camper, trolling motor, marine boats, etc.

👍 [SAFE AND SECURE]: Certified by ETL, the automatic smart trickle battery charger suitable for charging and maintaining Lead Acid batteries automatically, protection against short circuit, over voltage, over current, over charge, overload, overheat and reverse polarity.