12 Best Trickle Chargers of 2021

Jerry Wilson
Written by
Last update:

Quick plug-in chargers that boost a battery’s charge by only 20% are all well and good, but if you want a full charge, a trickle charger is the way to go.

A trickle charger is, by design, a safe, simple device that you can leave plugged in for long periods of time without worrying about your battery. While riding, you can simply unplug and plug in afterward, unlike a quick charger when you have to remember to take it with you.

The best trickle chargers will keep your battery near full charge for months, so you don’t have to worry about discharge and can ride the trail whenever you want.

NameCategoryProduct
Battery Tender Plus Charger and Maintainer: 12VBest OverallBattery Tender Plus Charger and Maintainer: 12V
12V to 14.8V Automatic Lead Acid Battery Charger/MaintainerBudget Pick12V to 14.8V Automatic Lead Acid Battery Charger/Maintainer
Sunforce 50022 5-Watt Solar Battery Trickle ChargerUpgrade PickSunforce 50022 5-Watt Solar Battery Trickle Charger

1. Battery Tender Plus Charger and Maintainer: 12V

Our rating: 9 / 10

Battery Tender Plus Charger and Maintainer: 12V

Check Price on Amazon

Pros:

  • Automatic Charging/ Maintainer
  • Waterproof
  • Float Mode
  • No Maintenance Required

Weighs 3 lbs. or 1.36 Kg

The Battery Tender Plus goes above and beyond when it comes to trickle chargers, offering to maintain your battery once it’s charged. The Battery Tender Plus comes in two variations: a 1.25 amp 12 Volt charger, and a 2.25 amp 6 Volt charger. The 1.25 amp charger can handle the maintenance of any car battery up to 60Ah. You can also use it for motorcycle batteries, snowmobile batteries, lawn mower batteries, ATV batteries, and more.

However, if you need to charge a larger battery, the 6 Volt model will do the trick. This model will charge a battery with a capacity of up to 100Ah. Remember, you don’t need to use a battery maintainer on a car battery, which is why our second pick is made for motorcycle batteries.

2. Battery Tender Junior Charger and Maintainer: Automatic 12V Powersports Battery Charger and Maintainer

Our rating: 9 / 10

Battery Tender Junior Charger and Maintainer: Automatic 12V Powersports Battery Charger and Maintainer

Check Price on Amazon

Pros:

  • Can charge up to 1.4 small to midsize batteries in one hour
  • Can connect to the battery via battery terminal or safety clip
  • Can automatically detect battery voltage
  • Has a built-in reverse polarity protection system
  • Has active control technology
  • Has a permanently attached power cord
  • Has a temperature compensation feature
  • Reliable, effective, and safe to use

While there are many trickle chargers available, the battery Tender Junior is the best for small to midsize bikes that have a lot of complex electronics. The Junior has a pack of adaptors and safety clips you can use.

One of the best things about the design of the Tender Junior is that it has built in reverse polarity feature, which saves you so much time.

While this product is completely safe to use for boats, ATVs, and other vehicles, you must be careful when charging, as it’s not meant for larger or more professional vehicles like cars.

3. Foval Automatic Trickle Battery Charger 12V 1000mA Smart Battery Charger

Our rating: 9 / 10

Foval Automatic Trickle Battery Charger 12V 1000mA Smart Battery Charger

Check Price on Amazon

Pros:

  • Cheap
  • Charges both 1.2V and 6V lead acid, Ni-Mh, and Ni-Cd batteries
  • Works with multiple batteries, both 6V and 12V
  • Battery capacity tester
  • Smart constant current / voltage charging
  • Low power consumption
  • Automatic 2-stage charging
  • Made from dustproof and waterproof materials
  • Charging begins when battery voltage falls below 12V
  • Safe public usage, safety and reliable

Cons:

  • It might not charge your battery if the voltage is less than 12.48V
  • There are reports of customer service not responding to inquiries
  • The casing doesn’t seem to be high quality.
  • The label feels a little low-grade

If you want an affordable and versatile trickle charger, this Foval Automatic Trickle Battery Charger is a great value. This device is designed to power every vehicle with battery is carrying a voltage up to 12V.

First off, I’m happy to say this charger charges many types of batteries and multiple batteries at the same time. You can charge up to six kinds of batteries with this charger including 1.2V and 6V lead-acid (automobile and motorcycle batteries), Ni-Mh and Ni-Cd batteries, etc.

4. LST Trickle Battery Charger Automatic Maintainer 6V 12V Smart Float Charger

Our rating: 8 / 10

LST Trickle Battery Charger Automatic Maintainer 6V 12V Smart Float Charger

Check Price on Amazon

Pros:

  • Automatic Charger
  • No need for 12-volt power
  • Sulfation-protected

(Black)

LST Trickle Battery Charger Automatic Maintainer 6V 12V Smart Float Charger for Automotive Car Motorcycle Lawn Mower Tractor SLA ATV AGM GEL CELL Lead Acid Batteries has the longest name on this list, but Oh man is it amazing! Like the name suggests, this trickle charger has a float-mode monitoring feature that monitors the battery’s charging voltage, temperature, and current. This is a huge plus, especially since it stops charging at 100% battery life, so you don’t overcharge your batteries. Save the headache.

The LST Trickle Battery Charger is also incredibly flexible. You can leave it attached to your battery indefinitely or use it to quickly boost your battery life before heading out. This is definitely one of the favorites on this list of best trickle chargers.

5. BMK 12V 5A Smart Battery Charger Portable Battery Maintainer

Our rating: 8 / 10

BMK 12V 5A Smart Battery Charger Portable Battery Maintainer

Check Price on Amazon

Pros:

  • Charges quickly at 15A handheld
  • Offers two modes – a 15A and 5A trickle charger for faster charging with 15A for 6-10V, 12-14V, 12-16V batteries and 5A for 6-10V, 6-12V, 12-16V batteries
  • A solid 12V 2A charger and a 12V 1A trickle charger for a safer charging experience
  • Comes with cigarette lighter cables, which makes it easy to use
  • Comes with a detachable four-foot long alligator clips charger
  • With a LED indicator, the user will know when a battery is fully charged
  • Well-constructed and heavy duty

6. 12V to 14.8V Automatic Lead Acid Battery Charger/Maintainer

Our rating: 8 / 10

12V to 14.8V Automatic Lead Acid Battery Charger/Maintainer

Check Price on Amazon

Pros:

  • Good Quality and Price
  • Charge Different Sizes of Batteries
  • Optional Boost Setting for Low Charge
  • Charges and Maintains Batteries
  • 12V to 14.8V Automatic Lead Acid Battery Charger/Maintainer, 1.2A Trickle Charger for car, Truck, Boat, Motorcycle, RV, Lawn Tractor, ATV and more with 12V or 24V

Cons:

  • Some metal debris on parts
  • 12V to 14.8V Automatic Lead Acid Battery Charger/Maintainer, 1.2A Trickle Charger for car, Truck, Boat, Motorcycle, RV, Lawn Tractor, ATV and more with 12V or 24V

ATV and more with 12V or 24V.

If you have an extra battery for your truck or you want to have one for extra battery power and you are sick of going to the donation bin to retrieve your old one.

Then this is the charger you need.

7. Supernatto 12V Smart Compact Battery Trickle Charger Maintainer

Our rating: 8 / 10

Supernatto 12V Smart Compact Battery Trickle Charger Maintainer

Check Price on Amazon

Pros:

  • Has a timer
  • Charges fast
  • Safety feature to avoid overcharging
  • PWM technology charges the battery smoother
  • Perfect for deep cycle batteries
  • Waterproof construction
  • Made with quality materials
  • Affordable
  • Has a 2-year warranty.

Cons:

  • The cable is short
  • Delivers little current to lead-acid batteries.

The most important thing in an onboard marin battery is to keep a trickle charge on it to not allow it to drop below 50%. This Supernatto 12V smart compact trickle charger keeps the battery at a full charge ahead of your next trip, so there’s no worry of overcharging, and you don’t need to keep an eye on it.

If an onboard marine battery isn’t charged often enough, the plates (lead sulfate crystals) can get weak, making the battery sulfated instead of charged, and the sulfation will not go away until it’s recharged by the demo mode on the onboard marine battery charger.

This charger has a timer, which allows you to set a desired charge time of your choice, like once a month or once every other month. The charger has an automatic safety feature, ensuring that your battery won’t be overcharged and damaged.

8. BLACK+DECKER BC2WBD Fully Automatic 2 Amp 12V Waterproof Battery Charger/Maintainer

Our rating: 8 / 10

BLACK+DECKER BC2WBD Fully Automatic 2 Amp 12V Waterproof Battery Charger/Maintainer

Check Price on Amazon

Pros:

  • Automatic Two-Amp Charger
  • Works With Flooded, Gel and AGM Batteries
  • Includes An LED Charge Level Indicator
  • Test Button Offers Visual Confirmation Of Charging Voltage Levels
  • Maintenance Mode Ensures Even Charging At 2 Amps, While Preventing Overcharging
  • Waterproof Case
  • Accu-Chrg Technology
  • 4-Sealed Ports
  • Includes Coated 6 ft. Battery Clamps
  • Dimensions: 4.6L x 2.13W x 5.1H inches

The BLACK+DECKER BC2WBD is a fully automatic 2 amp 12V charger and maintaner, which is designed to work with both flooded, gel and AGM batteries. Charging is performed at 2 amps, and the unit’s maintenance mode ensures consistent charging while preventing overcharging of battery types. The charger also comes equipped with a test button that allows you to get an idea of the current voltage levels during a charge.

9. Sunforce 50022 5-Watt Solar Battery Trickle Charger

Our rating: 7 / 10

Sunforce 50022 5-Watt Solar Battery Trickle Charger

Check Price on Amazon

Pros:

  • Affordable
  • Fully charged in 10 hours after getting direct sunlight

The Sunforce 50022 5-Watt Solar Battery Trickle Charger is the basic, no frills solar charger you need to keep you working lights, cell phones, or other small 5V electrical devices going during a power outage.

It works by converting the sun’s power into a trickle charge for your 12-volt battery that you keep in your car, boat, tractor, trailer, or anywhere that could use a battery boost and has constant direct sunlight. The Sunforce 50022 uses a weatherproof plastic case. With an efficiency of 18 to 30 percent, this solar battery trickle charger will fully charge your 12-volt battery in 10 hours after capturing direct sunlight for 10 hours.

Don’t be discouraged by all the fancy bells and whistles other solar trickle chargers tout. The Sunforce 50022 proves that low-end solar products can be just as powerful as their high-end competitors. The Sunforce 50022 is a low cost, no thrills, solar powered battery trickle charger that gets the job done.

10. NOCO Genius G3500 6V/12V 3.5 Amp Battery Charger and Maintainer

Our rating: 7 / 10

NOCO Genius G3500 6V/12V 3.5 Amp Battery Charger and Maintainer

Check Price on Amazon

Pros:

  • Automatic voltage switching
  • Red and yellow indicator lights
  • Reverse polarity protection
  • Built-in flashlight
  • Intuitive controls

The NOCO G3500 has a good number of safety features that make it one of the best car battery chargers on the market. The unit is housed in plastic casing that while being lightweight also allows for easy access to the control buttons. Inside is a microcontroller with an inbuilt safety timer that stops the charger after it has completed a full cycle.

The voltage sensor ensures the right output voltage is applied to the batteries. This product also has an inbuilt flashlight, which is an extra safety feature. The powerful 6-volt or 12-volt output let’s you charge the car battery quickly and efficiently.

There is reverse polarity protection and power outage protection, as well as a great feature called “charging maintenance mode” that ensures that your car battery is always kept to its optimum charging level that prevents the battery from gradually going down over a period of time.

11. SUAOKI ICS7+ 12V Battery Charger/Maintainer

Our rating: 6 / 10

SUAOKI ICS7+ 12V Battery Charger/Maintainer

Check Price on Amazon

Pros:

  • Super Fast Charging
  • Affordable
  • Comes with eight additional connectors

Marine, Motorized Skateboard, Snowmobile and Scooters.

If you need to have a charger handy to top-up the battery on your vehicle, you will find plenty of options out there. One of my favorites is the SUAOKI ICS7+, a 12V, fully automatic, trickle charger. Weighing just over a pound and measuring in at 6.8 x 2.9 x 2.5 inches, it’s not terribly heavy or bulky.

With seven ampere and three-and-a-half amp charging, you can quickly recharge a drained battery. This means you can start up your lawn mower, boat, or other E-powered device in no time … or fully charge it for long-term storage.

12. Trickle Charger RAVPower Car Battery Charger 12V 1.5A SLA Sealed Lead Acid Maintainer 2X Faster Charging

Our rating: 6 / 10

Trickle Charger RAVPower Car Battery Charger 12V 1.5A SLA Sealed Lead Acid Maintainer 2X Faster Charging

Check Price on Amazon

Pros:

  • Good on almost every car
  • Easy to use, long cords
  • Batteries store energy for weeks
  • Wide range of products

Cons:

  • requires assembly, is not plug-and-play
  • Recharge of 12V batteries is time-consuming

RAVPower is one of the leading manufacturers of batteries for portable electronics. The RAVPower 12V charger is designed to meet the needs of the growing demand for solar battery charging. The design is simple and practical, easy to install, lightweight, reliable and has a compact body. The package also includes a cigarette lighter adapter and ring connectors. With its versatility, the RAVPower charger can be used to replace an aging battery, or can be used to charge a new battery that you have purchased.

The manufacturer claims that this is the most lightweight and compact 12-volt charger in the market. It is 10% larger than the other chargers and weighs 3.5 ounces less than the other models. The dimensions are 1.6 x 1.6 x 4.5 inches and the product weighs 12.3 ounces.

Frequently Asked Questions (FAQ)

What is the best trickle charger to buy?

This should give you some more options if you need a trickle charger for a big battery. Just remember to shop around and read reviews before you buy.

What size trickle charger do I need?

This will depend on how big your battery is and the amount of time you typically operate your battery without adding more water. We recommend getting a charger that is rated at least 50% higher than your actual battery size. This will allow the charger to charge up your battery fully (in about 10 hours), so that when you let your battery sit without water, it only loses about 50% of the water. Then, you know that you only need to add half as much water (in this case, half of the 50% lost water), when you add water next time.

What is the best 12 volt battery charger?

When buying a trickle charger, you need to make sure you get one with the right amperage. The amperage on a good smart battery charger should be 2 amps or higher. Many people today are ditching the old-fashioned and bulky chargers for the more compact smart battery charger, which automatically limits your options.

Most smart chargers have an output of 4 amps or higher which means that it will often be more expensive. The higher the amp output, the more likely it is to charge higher capacity batteries than the cheaper options. By increasing the output of the charger, you can easily charge more than one battery in a single session.

Can trickle chargers damage battery?

Some trickle chargers consume additional power, so you should be careful in setting the timer for trickle charging.

It is generally believed that trickle chargers are better than maintainers, however, it is only true for vehicle batteries and not for marine batteries. Trickle chargers tend to heat the batteries too much and can cause permanent damage.

It is true that trickle chargers are more efficient in terms of power consumption and charging speed. However, they are more expensive and can take longer to revive a battery.

Conclusion

Batteries can be expensive, and the cost of car maintenance is already significantly more expensive than maintenance for most other vehicles. This makes it important that you use the best trickle charger for the job right from the beginning. The best thing about these under-appreciated devices is that you can get away with buying less of them. You see, a trickle charger can be used for many different types of batteries, therefore making their initial investment several times over.

Our Recommendation

NameCategoryProduct
Battery Tender Plus Charger and Maintainer: 12VBest OverallBattery Tender Plus Charger and Maintainer: 12V
12V to 14.8V Automatic Lead Acid Battery Charger/MaintainerBudget Pick12V to 14.8V Automatic Lead Acid Battery Charger/Maintainer
Sunforce 50022 5-Watt Solar Battery Trickle ChargerUpgrade PickSunforce 50022 5-Watt Solar Battery Trickle Charger