During the offseason, you can leave your car fully charged by using a battery charger. It helps maintain the stored voltage without overcharging. Also, this device is perfect for loading up most types of battery with either 6 volts or 12 volts. In this review, we have the best battery tender in the market.

Last update on 2019-08-09 at 17:15 (UTC+0) / Affiliate links / Images from Amazon Product Advertising API

#12. BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger

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By: BLACK+DECKER

The above battery charger by Black +Decker offers a high frequency to not only charge but ensure the voltage is retained. This helps to keep cells in stored cars and other applications at best capacity during offseason. It can charge 12-volt GEL, WET and AGM batteries in specialty vehicles, RVs, classic and antique cars, motorcycles, marine deep cycle cells, lawnmowers, watercraft, snowmobiles, and ATVs. Operating this handy device is simple even for the beginner by sliding the voltage selector switch to the voltage type you prefer suitable for your battery and using the ring and clip terminals. A bonus feature is the Quick Disconnect Harness that connects and disconnects your device in seconds as the Energy-Save mode ensures there is no current draw as it uses low power consumption.

This gadget stops loading automatically when the battery is topped off or fully charged and switches to float mode to maintain charge. With integrated circuit protection, it prevents overcharging, short circuit, and reverse polarity for improved safety performance and safety. You can use the provided mounting bracket for quick and convenient placement

#11. 12V to 14.8V Automatic Lead Acid Best Battery Charger

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By: OrionMotorTech

We understand some battery charges damage the battery during and after extended use. For this one, it has a safe construction that charges 12-volt lead-acid batteries like the sealed maintenance free and flooded types making it the best unit for a motorcycle, truck, boat, and other vehicles, it comes with a fully automatic system to eliminate manuals operation as you plug in and let the process start. Also, you don’t have to continually monitor the action as the mechanism maintains accurate voltage for an extended time.

A plus feature is a microprocessor-controlled program which controls the entire procedure and stops when your unit is full. Then, monitors the voltage and maintains cell with a float charging current up to a maximum of 14.8 volts. This accessory applies a spark-free mechanism to prevent any sparks and also has a design that safeguards against short circuit. Additionally, its energy-saving structure featuring an LED indicator displays the charging status to keep you up to speed. Use the positive clips with a red mark and the negative one with black printing for best results.

#10. Trickle Charger RAVPower Car Battery Charger

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By: RAVPower

RAVPower charger has a pocket-friendly price and gives you a reliable performance. It can charge two times faster than others in the market to minimize the time used for loading. With a powerful 12v output, you can quickly reload an SLA car battery for you to drive over sooner. It comes with smarter features to improve safety as it protects your vehicle cell with intelligent circuits against short circuit, reverse polarity, voltage, and current surge. This makes it more advanced and at the same time, ensure a hands-free experience.

Boasting of high versatility, this device is suitable for most cars and adapts to all types of 12-volt batteries using the alligator or ring connectors. The connectors are made from quality materials to withstand extreme use and improve speed. We take note of the intuitive indicators that help you monitor the battery charging statues to know when it is time to unplug and go.

#9. NOCO G3500EU 6V/12V 3.5 Amp European Smart Battery Charger and Maintainer

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By: NOCO

If you want the best battery charger and maintainer, you have found it. The NOCO device has a versatile structure to quickly load a battery in hours such as trucks, boats, RVs, loan mowers, and others up to 120 amp-hours. This makes it is ideal for keeping cars completely-charged and maintained for long-term storage or all year-round maintenance to improve longevity and performance. Also, it works well with both 12v and 6v lead-acid cells like the AGM, GEL, WET or standard automotive marine, deep-cycle, or maintenance-free battery. Now you have a handy gadget that gives you a worry-free service without overcharging or short-circuiting.

When preparing to start the loading process, plug-in this accessory and let the charging technology automatically monitor the battery. Also, the advanced Repair Mode efficiently reverses any damaging effects when a battery is left uncharged for an extended period to improve its performance. A bonus functionality is the optimized charge mode that has a unique system to charge and maintain a 12-volt lithium-ion cell safely. For best results, use it with an internal BMS.

#8. NOCO Genius G750 6V/12V 750mA Battery Charger

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By: NOCO

NOCO battery charger offers you the most convenient and dependable way to load and maintain a vehicle as it extends the battery life. You can use it all through for proper car, boat, RV, lawnmower, truck, and other vehicle performance. Also, it is multipurpose to recharge smaller capacity cells on ATV, motorcycles, watercraft, snowmobiles, and even scooters. If you have a power wheel at home, no more worries about the battery life. You can use this gadget that provides up to 30-amp-hours. Boasting of advanced technology, it works with 6 and 12-volt lead-acid batteries like AGM, GEL, and WET or standard automotive, maintenance-free, deep cycle or marine batteries.

The above accessory keeps your cell completely charged without overcharging to enhance safety. Plug in, and the charging system automatically monitors and maintain your cell. Moreover, it comes with reverse polarity protection that protects against polarity issues and also spark-proof technology to prevents sparks when connecting and disconnecting the battery. It has a lovely finish which looks great, making it an ideal fit for a loved one who needs a reliable battery charging unit.

#7. Mroinge MBC010 Automotive Trickle Maintainer 12V 1A Smart Automatic Charger

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By: Mroinge

Stop using battery chargers that damage your cell and cost quite a lot and fail to deliver the expected results. Mroinge has come up with this quality-made device that offers a simple operation better than the rest in the same price range. It allows you to smoothly connect to a vehicle and motorcycle battery with the provided battery O-ring terminals and clips. Plus, the 12ft DC cord is long enough to offer maximum flexibility. No more worries of adding extra extensions to move your unit with complete comfort. Another thing is the Spark-proof technology that safeguards against sparks during lead connection, and the reverse polarity protection for added safety as the overcharging protection keeps your battery at optimal voltage level.

This device is suitable for 12-volt lead-acid, sealed maintenance-free, and flooded batteries, including GEL and AGM. Thanks to the 4-step charging program featuring Initialization, Absorption Mode, Bulk Charge, and Float Mode let you optimization the battery power, without causing any damaging effects. Not only does this improve performance but also longevity. You can view the status of the cell with the inbuilt 2-color LED indicator. It has a red and green bulb to let you know when the battery is full or needs more charge. Additionally, the Intelligent IC chip helps to load and maintain the cells with the help of a smart charging program.

#6. Battery Tender 022-0209-DL-WH 4A Selectable Charger

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By: Battery Tender

Unlike other battery tenders that need close monitoring, this one has an automated system that avoids overcharging and give you an easy time. This makes it suitable for maintaining your battery’s accurate voltage level storage. Constructed to allow you to leave it connected lets you do other pressing actions around your house and other places. Unplug it from a wall outlet and detach the power cord to store in a safe place. The LED indicator is an excellent addition for you to see the battery status and other diagnostic information more easily.

You can switch it to 6v from 12v at 4A because of the Lithium or AGM ion switchable mechanism. This accessory comes with rings and clips connectors that attach smoothly to the battery points and stay secure until you remove them. No more worries about interrupting loading when you are away. With a Reverse Hook-up protection, your battery has full protection against damages and also overcharging to keep it at the correct state.

#5. Foval Automatic Trickle Battery Charger

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By: FOVAL

If you are looking for an affordable battery tender, this one is an excellent choice. Boasting of a small profile with a dimension of 3.9 x 2.4 x 1.25 inches, it is suitable for most cars and quickly adapts to 12V battery for golf carts, motorcycles, ATVs, automobiles, boats, airplanes, watercraft, RVs, and more using alligator or ring connectors. Also, the charging process is automatic as it switches to float mode to maintain the voltage after a full charge.

Foval comes with intuitive LED indicators that deliver an optimal vision of the charging state and diagnostic information even in maintenance mode. You can see the battery status better even in dark-lit places. This item is ETL listed, which means it has maximum safety features like the reverse polarity protection and a spark-proof function that helps in lead connection. You can use the 8-foot output cable to quickly connect to a power source from a considerable range for a flooded, lead-acid or sealed maintenance free car battery. Another important feature is a 4-step charging technology with Bulk Charge, Initialization, and Absorption Mode to add more convenience and security.

#4. Battery Tender Plus 021-0128, 1.25 Amp Battery Charger

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By: Battery Tender

If you spend too much money on a battery tender that causes damages to your battery, it is time to change to a more reliable one. The above one is a 1.25A charger that charges a cell quickly and at the same time maintains it at suitable storage voltage. This process is seamless and does not cause damaging effects generally found in some trickle charges. It is fast and efficient than the rest in the market to give you a comfortable time and hands-free operation. The included quick connect harness lets you attach to those hard to reach areas much smoother without using too much effort.

A 6-ft power cord is long enough to let you connect to your cell in a good distance from the outlet. An advantage is reverse polarity protection that guarantees safety as the red and green indicators alternately blink during this process. When the charge is full, the green flashing will stay constant. This accessory has a new mechanism that switches from a complete load to float charging mode automatically to give you a simple operation.

#3. Best Battery Tender 800 is a SuperSmart Battery Charger

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By: Battery Tender

We love this battery tender because of its automated system to give you an easy to use service. It has a SuperSmart charging functionality that helps to maintain the correct voltage during the loading process. You can leave your battery unattended and don’t worry about short-circuiting and sparks