Our Favorite Picks:
20 Top Car Battery Tender Reviews:
Bestseller No. 1 
Battery Tender Junior 12V Charger and Maintainer: Automatic 12V Powersports Battery Charger and Maintainer for Motorcycle, ATVs, and More - Smart 12 Volt, 750mA Battery Float Chargers - 021-0123
- STAY CHARGED: Battery Tender battery chargers and maintainers provide a full charge to your powersport vehicle’s battery before switching to float mode to maintain proper voltage levels for safe, long-term storage
- EXTEND BATTERY LIFE: Compatible with all 12V lead-acid, flooded, AGM, and gel cell batteries. Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode) allows for optimization of battery power, without overcharging or battery damage
- INCLUDES: 12V, 750mA battery charger and battery maintainer with 12-foot output cord, fused-ring terminal harness for hard-to-reach batteries and alligator clip accessory cables, 5-year warranty, and lifetime customer support
- SIMPLE & SAFE: Low maintenance, easy-to-use, universal battery charger is just 3.3 x 1.3 x 2.4 inches, 1 lb (charger only). Spark-proof circuitry ensures no-spark connections, and automatic reversed hook-up detection verifies correct connection
- MONITOR POWER LEVELS: Two-color charge status LED light indicates the state of the charge and if the battery voltage drops too far under load, adaptive charging will resume full charger output power. Automatic charge cycle functionality switches to float mode after fully charging the battery
Bestseller No. 2 
Battery Tender Plus 12V Battery Charger and Maintainer: 1.25 AMP Powersport Battery Charger and Maintainer for Motorcycles, ATVs, UTVs - Smart 12 Volt Automatic Float Charger - 021-0128
- STAY CHARGED: Provides a full charge to your powersports vehicle’s battery before switching to float mode to maintain proper voltage levels for safe, long-term storage without overcharging
- EXTEND BATTERY LIFE: Compatible with all 12V lead-acid, flooded, AGM, and gel cell batteries. Complete 4-step charging program (Initialization, Bulk Charge, Float Mode) allows for optimization of battery power, without overcharging
- INCLUDES: 12V, 1.25 AMP battery charger, fused ring terminal and alligator clip accessory cables, 10-year warranty, and lifetime customer support
- EASY TO USE: Low maintenance design is quick and easy to use, this universal powersport vehicle charger and maintainer is 4.87 x 3.25 x 2.93 inches, 1.45 lbs (charger only)
- MONITOR POWER LEVELS: Solid state two-color LED light indicates the state of the charge and if the battery voltage drops too far under load, charging will resume full charger output power
SaleBestseller No. 3 
Battery Tender 4 AMP Car Battery Charger and Maintainer: Switchable 6V / 12V, Automotive Battery Charger and Maintainer for Cars, Trucks, and SUVs, Lead Acid & Lithium Battery Charger - 022-0209-BT-WH
- 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
SaleBestseller No. 4 
Battery Tender 3 AMP Car Battery Charger - Automotive Switchable 6/12V, Fully Automatic Battery Charger and Maintainer for Cars, SUVs, and Trucks - 6V/12V, 3 AMP Charger - 022-0202-COS
- STAY CHARGED: 3 AMP automotive battery charger 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
- VERSATILITY: Compatible with lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell), this charger works with 6 volt and 12 volt batteries with the push of a button
- INCLUDES: 3 AMP selectable voltage (12V or 6V) battery charger, ring terminal and alligator clip cable connections, 5 year warranty, and lifetime customer service
- HIGH POWERED: This three AMP automotive battery charger delivers a powerful electronic charge to keep your vehicle running at peak performance providing stronger, more reliable engine starts and extending battery life
- SAFE AND SECURE: Spark-proof during lead connection, this car battery charger automatically detects reverse polarity to ensure a correct, locked-in connection before providing power
SaleBestseller No. 5 
Battery Tender Plus 12V Battery Charger and Maintainer: Selectable 6V, 1.25 Amp, 12V Battery Charger and Maintainer for Powersports - Switchable 6 and 12V Battery Float Charger - 022-0211-DL-WH
- STAY CHARGED: The 1.25 amp, 12 volt battery charger provides a full charge to your powersports battery before automatically switching to float mode to maintain proper voltage levels without overcharging the battery
- HIGH POWERED: Contains 50% more charging power than the Battery Tender Junior to supply a much quicker charge to your motorcycle, ATV, UTV, personal watercraft, or scooter to maintain peak performance
- EASY TO USE: A low maintenance design that's quick and easy to use, our universal power sports 12 volt battery charger is lightweight and compact allowing it to operate everywhere, even in small storage spaces. Sparkproof - Battery Tender checks for a correct connection befo
- EXTENDED BATTERY LIFE: Compatible with lead-acid, flooded, and sealed maintenance free batteries (AGM and gel cell) and ideal for use in long term storage to provide and maintain an optimal Connect It And Forget It: Once connected, the Battery Tender Charger manages your battery’s health on it’s own
- SAFE AND SECURE: Our selectable 12 volt battery charger and maintainer is spark-proof during lead connection and automatically detects reverse polarity to ensure a proper connection before providing power. 5 Year Industry Leading Warranty
SaleBestseller No. 6 
Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor, Charge, and Maintain your Battery. It's Encapsulated and Protected from Moisture by an Electrical Insulation
- All the charging characteristics of the Battery Tender Junior: fully-automated “SuperSmart” charging and maintaining, spark proof, reverse polarity protection, and short circuit protection
- The interior is completely encapsulated, protected from shock, vibration, and moisture by an electrically insulating, thermally conductive, flame retardant, synthetic epoxy resin compound
- This charger is no larger than a standard computer mouse yet packs 800 milliamps of pure constant current charging power and is listed in the California Appliance Efficiency Database
- Includes alligator clips and ring terminals, and is perfect for all outdoor types of ATV's, watercraft, motorcycles, boats, or anywhere water is a threat, including lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell).
- AC Power Cord Length: 6 ft.- 18 AWG; DC Output Cord Length: 4.5 ft. - 18 AWG; DC Output Accessory Length: 1.5 ft.
Bestseller No. 7 
Battery Tender 12 Volt Battery Charger, 15 Amp / 8 Amp / 2 Amp Selectable Chemistry by Deltran - 022-0234-DL-WH
- For all types of 12V Battery Charger lead-acid batteries, including Gel and AGM
- Auto-charging or selectable charging rates: 2A slow charge, 8A charge, 15A rapid charge
- Selectable battery types: standard, AGM, Gel
- Interactive LCD display shows charging rate selected, battery type selected, battery percentage charged, error messages
- Spark proof, reverse hook-up protection, and short circuit protection
SaleBestseller No. 9 
NOCO GENIUS1, 1A Smart Car Battery Charger, 6V and 12V Portable Automotive Charger, Battery Maintainer, Trickle Charger and Desulfator for AGM, Lithium (LiFePO4), Motorcycle and Deep Cycle Batteries
- Meet the GENIUS1 - Similar to our G750, just better. It's 35% smaller and delivers over 35% more power. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.
- 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).
- Enjoy precision charging - An integrated digital 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 - An advanced battery repair mode uses slow pulse reconditioner technology to detect battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
SaleBestseller No. 10 
NOCO GENIUS5, 5A Smart Car Battery Charger, 6V and 12V Portable Automotive Charger, Battery Maintainer, Trickle Charger and Desulfator for AGM, Lithium (LiFePO4), Motorcycle and Deep Cycle Batteries
- Meet the GENIUS5 - Similar to our G3500, just better. It's 34% smaller and delivers over 65% more power. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.
- 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).
- Enjoy precision charging - An integrated digital 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 - An advanced battery repair mode uses slow pulse reconditioner technology to detect battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
SaleBestseller No. 11 
MOTOPOWER MP00205A 12V 800mA Automatic Battery Charger, Battery Maintainer, Trickle Charger, and Battery Desulfator
- 🔥【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.
- 🔥【ETL/UL Certified, Multi-level Safety Protection & Timer Set Up】 - ETL safety certified. Overcharge, short circuit and reverse polarity protected. Charge the battery up to 14.4V and Maintain the battery at 13.6V for long time to avoid gasing and to extend the battery life. 24-hour Timer is set up in the program to terminate the charge and enter the maintaining mode once the voltage is above 14V to ensure safety.
- 🔥【Easy Operation】 -Just plug-in, connect to the battery and start charging or maintaining your battery. The desulfation is working automatically during the charing. No manual operation.
SaleBestseller No. 12 
NOCO GENIUS2, 2A Smart Car Battery Charger, 6V and 12V Portable Automotive Charger, Battery Maintainer, Trickle Charger and Desulfator for AGM, Lithium (LiFePO4), Motorcycle and Deep Cycle Batteries
- Meet the GENIUS2 - Similar to our G1100, just better. It's 30% smaller and delivers over 140% more power. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.
- 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).
- Enjoy precision charging - An integrated digital 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 - An advanced battery repair mode uses slow pulse reconditioner technology to detect battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
Bestseller No. 13 
Foval Automatic Trickle Battery Charger 12V 1000mA Smart Battery Charger
- (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
- Intuitive LED indicators provide visual state-of-charge feedback and diagnostic information, even when in maintenance mode.
- It will charge and maintain your battery so that it is ready to go when you are! It's lightweight, fully automatic and easy to use
SaleBestseller No. 14 
NOCO GENIUS2D, 2A Direct-Mount Smart Onboard Car Battery Charger, 12V Automotive Charger, Battery Maintainer, Trickle Charger and Desulfator for AGM, Marine, ATV, Truck and Deep Cycle Batteries
- Meet the GENIUS2D - A direct-mount onboard battery charger for an under-the-hood battery charging. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.
- Do more with Genius - Designed for 12-volt sealed lead-acid automotive, marine, RV, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free batteries.
- Direct Mount - Securely mounts nearby the battery with its rugged snap-fit mounting bracket and effortlessly installs into most materials with truss-head self-tapping screws.
- Enjoy precision charging - An integrated digital 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 - Charge batteries as low as 1-volt, including flooded, gel, and AGM, as well as automotive, marine, and deep-cycle batteries.
SaleBestseller No. 15 
HULKMAN Sigma 1, 1000mA 6V/12V Automatic Smart Car Battery Charger, Trickle Charger, Battery Maintainer, and Desulfator with Intelligent Interface
- [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.
- [Read With Ease]: Once you plug in and attach the battery, a huge 2.7-inch LED screen intuitively indicates the battery level, voltage, and charging mode. Simply select a charging mode and it will begin delivering the power to your battery, making your charge easier and better than ever before.
- [Save Dead Batteries]: If your battery has died, you can now charge dead batteries with our “Advanced Loading Mode,” a scientific charging process that delivers significant current power through qualification, soft start, and pulse mode, as well as recondition and bulk stages, to stimulate dead batteries back to life.
- [One For All]: This charger is compatible with either 6V or 12V sealed lead-acid, and 12V lithium-ion batteries, including deep-cycle, AGM, lifepo4, flooded, gel, wet, maintenance-free, EFB, and calcium batteries.
SaleBestseller No. 16 
CTEK - 40-206 MXS 5.0 Fully Automatic 4.3 amp Battery Charger and Maintainer 12V
- Unique reconditioning mode, built-in-temperature sensing capabilities
- Completely sealed unit, spark proof and reverse - polarity protected
- Premium input and output cable with robust strain relief
- Ideal for start-stop systems, 100-120VAC, 50-60Hz
- Start voltage: 2.0 V, Battery capacity: 1.2–160 Ah
Bestseller No. 17 
BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger/Maintainer with Cable Clamps and O-Ring Terminals
- Charges and maintains 12 volt and 6 volt AGM, GEL and WET batteries.Includes : (1) Battery Maintainer/Charger, (1) 12V/DC Outlet, (1) Battery Clamps, (1) Ring Terminals
- Easy connection to vehicle battery using battery clips and O-ring terminals
- Stops charging automatically when battery is fully charged or topped off, switching to float mode monitoring
- Built-in circuit protection guards against overcharging, reverse polarity, or short circuit; ETL certified for performance and safety
- Mounting bracket built-in to charger for convenient placement
SaleBestseller No. 18 
Schumacher SC1355 Fully Automatic Battery Maintainer - 1.5 Amp, 6/12V - For Car, Power Sport, or Marine Batteries
- RELIABLE POWER: Delivers 1.5 Amp maintain to power sport, car, or marine batteries; compatible with standard, AGM, and deep-cycle batteries
- SMART CHARGING: Microprocessor-controlled automatic amperage rate adjustment and multi-stage charging for added precision, safety, and battery life
- FLOAT MODE: Float-mode monitoring automatically maintains optimum battery life
- VOLTAGE DETECTION: Automatically detects 6V or 12V batteries
- SAFE AND RELIABLE: Reverse hook-up protection prevents the charger from operating if the clamps are reversed
SaleBestseller No. 19 
SUHU Car Battery Charger, 12V/8A 24V/4A Smart Automatic Battery Charger Maintainer Trickle Charger for Car Truck Motorcycle Lawn Mower Boat Marine RV SUV ATV SLA Wet AGM Gel Cell Lead Acid Battery Red
- ➤【Wide Application】 This intelligent battery charger is designed for all types 12V and 24V lead-Acid batteries that within 6-150Ah(12V), 6-100Ah(24V), including AGM, GEL, SLA, Flooded (WET), or any common automotive, deep-cycle, marine, or maintenance-free battery. Note: Lithium battery is prohibited. Compatible with all types of vehicles - charges and maintains, electric vehicles agricultural vehicles, off-road vehicles, pickup trucks, boats, yachts, motorboats, and more
- ➤【Effective Reparation Mode】Automatic sulfa-ting and acid stratification detection, One Key to Repair, Activate Battery, Pulse repair function can help to repair your loss battery and extend battery life. Note: It can not activate a dead battery or repair a battery which is damaged seriously; it also can not repair a battery back to 100% new
- ➤【Automatic Charging】Automatic detection of 12V or 24V battery, automatic monitoring of the entire charging process through a microprocessor-controlled program. Automatically adjust the charging current, easy to deal with a variety of harsh voltage environments. This 24V 12V car battery charger ensure the adaptive charging process, with maximum safety, and automatically stop when the battery is fully charged
- ➤【Safety Charging】Adopt ABS flame-retardant shell, fireproof, electric shock, corrosion resistant, solid and durable, Built in circuit protection guards against reverse polarity, sparks, overcharging, over-current, open-circuits, short-circuits and overheating. Smart LCD display shows the charging status and battery status to make you more assured of charging
- ➤【Robust Quality and Service】Automotive Battery Charger has a durable and efficient design. With well-experienced engineers and dedicated support team, we are always standing by your side and ready to help you. If you have any questions, please feel free to contact us by email. NOTE: IT CAN'T JUMP START CAR, JUST HAS BATTERY CHARGING FUNCTION
SaleBestseller No. 20 
Schumacher SP1297 Fully Automatic Battery Charger, Maintainer, and Auto Desulfator - 3 Amp, 12V - For Cars, Motorcycles, Lawn Tractors, Power Sports, Marine Batteries
- RELIABLE POWER: Delivers 3 Amps to charge and maintain your car, boat, or power sport batteries; compatible with standard, AGM, deep-cycle batteries and Lithium ion (LiFePO4)
- SMART CHARGING: Microprocessor-controlled automatic amperage rate adjustment and multi-stage charging for added precision, safety, and battery life
- FLOAT MODE: Float-mode monitoring automatically maintains optimum battery charge
- HOOK ATTACHMENT: Includes hook attachment for hanging wherever you keep your tools
- SAFE AND RELIABLE: Reverse hook-up protection prevents the charger from operating if the clamps are reversed
Last update on 2023-01-12 / Affiliate links / Images from Amazon Product Advertising API