Best Portable Battery Tenders 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

🔥【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.

➤ Easy To Use: Easy connection to motorcycles and vehicle battery using the included big battery clips and O-ring terminals. DC cord total length of 12ft.

➤ Small size suitable for most vehicles: adapts to all kinds of 6V and 12V battery for cars, motorcycles, lawn mowers, ATVs, lawn tractors, trucks, SUVs, boats, classic cars, emergency battery and more.

➤ Perfect for charging and maintaining all 6V and 12V lead-acid batteries, including flooded, GEL, AGM, VRLA, Deep-cycle and maintenance-free batteries.

【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.

√ 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.

√ 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.

【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.

【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.

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.

RESTORE YOUR BATTERY: Our battery charger and maintainer set of 2 charges various types of 12V lead-acid batteries, including flooded and sealed maintenance-free batteries such as AGM and gel batteries

WIDE COMPATIBILITY: Our dual 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

【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).

【ETL LISTED BATTERY CHARGER】Only a few of the car battery chargers were US ETL(Electrical Testing Laboratories) certificated, it will be quite safe and worry-free during the charging process. Easy to use just connect it and forget it even leave it to charge your batteries for months or years.

【UNIVERSAL TRICKLE CHARGER】 All-in-one solution of battery charger, battery maintainer, trickle charger, and battery desulfator. Cord Length 69IN/1.75M. Keep charging or repairing all 12-volt lead-acid automotive, marine and deep-cycle batteries including AGM, GEL, SLA, Flooded in cars, trucks, SUVs, motorcycles, lawn mowers, boats, etc.

【HARMLESS SMART CHARGER】 As we all know that the lower charging current, the less harm to the battery. It adopts a universal 12V voltage but only inputs 750mA to charge the battery. Fully-automatic smart harmless charging protects your expensive battery to extend the battery life.

【Plug & play, work with diverse applications】This solar trickle charger comes with a quick SAE connection and 3 options for ring terminals, alligator clips, and cigarette lighters, to charge your batteries or automobiles easily, works with boats, SUVs, RVs, electric fences, accessory batteries, and more.

【Charge & maintain all kinds of 12 batteries】This solar trickle charger comes with DC adaptors for direct charge 12v batteries, able to work with multiple battery types, such as Gel, AGM, Flooded, and Lithium batteries, etc.

【High efficiency, long service life】Renogy panels use high-efficiency monocrystalline solar cells, and multi-layered sheet laminations enhance cell performance and provide a long service life.

【Widely Compatible】Battery charger suitable for both 6V and 12V batteries, It works with AGM, EFB, MF, FLOODED, VRLA, SLA and Wet batteries, meaning that it can be used for the batteries in Car, Truck, Motorcycle, RV, SUV, ATV, golf cart, tricycles, agricultural vehicles, bus, etc.

【Plug and Play】No complicated steps, just plug and charge, stay at home and charge your batteries on your own. All-in-one battery solution as car battery charger, battery maintainer, trickle charger, plus battery desulfator. The must-have tool for your garage.

【Enjoy Precision Charging】Portable battery charger/maintainer automatically adjusts the charge current and maintainability according to the temperature. 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.

🚜【WIDELY COMPATIBLE BATTERY CHARGER】🚜SKY TOPPOWER smart battery charger is a great helper for charging batteries, suitable for 6V/12V (1.2Ah-120Ah) lead acid batteries, it works with Calcium,AGM,EFB,MF, FLOODED, VRLA,SLA and Wet batteries, it can be used for the batteries in car motorcycles, lawnmowers, ATVs, lawn tractors, trucks, SUVs, boats, PWCs, classic cars, and more. ⚠️⚠️⚠️ NOT FOR LITHIUM BATTERY⚠️⚠️⚠️

🚘【FULLY AUTOMATIC BATTERY CHARGER】🚘It only work with 110v, auto detects battery volts and outputs desired charging voltage and current, then auto switch to trickle charge after reaching full battery capacity. Has automatic charging process from ( DIAGNOSIS - DESULFATION - SOFTSTART - BULKCHARGE - ABSORBTION - TESTMODE - RECONDITION to FLOAT ), Specially designed for 6V/12V battery, charging current 1-4A ladder charging.

🚖【LCD SCREEN & INTELLIGENT DETECTION】🚖 The battery charger maintainer adopt a backlit LCD display, clearly and visibly displays charging voltage, current, battery type, charging mode, and the percentage of power remaining. Allow quick and easy to use the trickle charger in the dark or at night. It also automatically detects batteries, maintain and charge them.

【ONE CHARGER FOR EVERYTHING IN YOUR GARAGE 】Charge or Repair all 6V and 12V Lead-Acid Batteries flooded, AGM, gel, deep cycle batteries and 12V lithium batteries. Compatible with all types of vehicles: ideal for cars, SUVs, RVs and trucks, will work with automobiles, motorcycles, scooters, lawn mowers, ATVs, tractors, boats, PWCs, jet skis, classic cars, and other device in your home. Perfect for the user with multiple vehicle types and higher-demand battery charging and maintenance requirements.

【Multi-Protection Ensures Charging Safety】Built in automatic charge voltage compensation ensures the most efficient charging in extreme cold or hot weather conditions. Safe charging and avoid any dangerous situation: reverse protection, cooling system, overcurrent protection, fireproof materials, overvoltage protection, short circuit protection, IP65 waterproof. The multi-protected trickle charger features capabilities for improved charging in all weather and ensures safe charging anytime, anywhere.

【LCD Screen Display Provides Visualized Charging】The smart digital LCD screen, which clearly displays charging voltage, current, battery type, charging mode, and the percentage of power remaining. The car battery charger uses a 8-step charging sequence to detect, charge, desulfate, and maintain your battery. The LCD screen will display the 8-step charging one by one, and you can easily tell the charging status. Allow quick and easy to use the trickle charger in the dark or at night.

Versatile charging capability: The Andeman 6-Amp Automotive Smart Battery Charger offers a wide range of charging functions, including AGM, standard battery (GEL, SLA, VRLA), Lithium (LiFePO4), DC adapter, and battery testing. This versatility allows it to charge a variety of vehicle batteries, from cars and trucks to motorcycles, motorboats, ATVs, and more.

Intelligent charging technology: The battery charger uses the latest charging curves to ensure fast and efficient charging while also protecting against overcharging, overload, reverse polarity, and overheating. This intelligent technology ensures that your batteries are charged safely and effectively, prolonging their lifespan.

Adaptive and low-temperature charging: The Andeman charger features adaptive charging technology that regenerates sulphated and/or deep discharged SLA and EFB batteries. It also offers low-temperature charging, making it suitable for use in cold environments.

FULLY AUTOMATIC: Automatically detects 6V and 12V batteries connected to the unit

ADVANCED CHARGING ALGORITHM: Multi-stage charging employs an advanced algorithm to maximize battery charge, health, and lifespan

FLOAT-MODE MONITORING: While in float mode, a battery charger and maintainer delivers a small current when necessary to keep the unit fully charged

Charging Protection: Fully auto 4-stage charging process by MCU controlled, allows for optimization of battery power, without over charging. Battery charger have Overcharge Protection/ Overload Protection/ Reverse Polarity Protection/ Over Heat Protection/ Bad battery detection. With CE RoHS FCC ETL certificate.

Charging Functions: Our battery charger using the latest charging curves, perfect for charging all 6V / 12V AGM batteries (SLA, VRLA, GEL, AGM, Lead-acid battery pack), & 4S Lithium/ 14.4V LiFePO4 batteries. Min.starting voltage: 3.0V. Charging current: 1.5A (charging current will be automatically adapted for an optimal charging result).

Widely Used: Input: 100-240V AC, 50-60Hz, 1.0A. Battery capacities: charging (5-40Ah), maintenance(5-60Ah). 6V/12V output by switch on, maintaining the deep cycle battery. Suitable for car, truck, motorcycle, SUV, UTV, ATV, RV, motorboat, jet ski, dirt bike, golf cart, snowmobile and so on.

ULTIMATE CHARGE PROTECTION: From one of the most trusted battery brands in America comes the easiest & most reliable way to charge + maintain your vehicle batteries. No spark, short-circuit proof & reverse polarity protection to ensure user & equipment protection. With the Interstate Guardian, you’ll always be good to go

BATTERY CHARGER WITH BENEFITS: 12-volt microprocessor controlled smart charger. Excellent for many battery types; Auto, Marine, Powersports, Flooded, Gel, AGM & more. Spark-proof design with reverse polarity protection. Perfect for everyday charging & long-term vehicle storage, with a 12-month hassle-free warranty

EASY-TO-USE: Start charging battery directly without complicated access interface. Fully charges a battery & automatically switches to float maintenance charge mode. Easy-to-read LED indicators tell you exactly what the charger is doing & eliminates the need for guesswork, making it Outrageously Dependable. Designed to work flawlessly with multiple wet & maintenance free lead-acid battery types – SLI, VRLA, Gel, AGM, Spiral & CAL/CAL

Flame-retardant ABS material has high corrosion resistance, impact resistance, wear resistance, heat resistance, high comprehensive performance and good electrical insulation.

Strong alligator clip, safe and practical.

The status indicator is designed, the green light is not connected or is full, and the red light indicates that it is charging, letting you know the charging status.