Best Trickle Charger for Car Battery

If you are a kind of person who keep his car parked for weeks then you are going to need trickle charger for your car so that you don’t have to struggle with dead battery. Having a good quality trickle charger will help you to revive the car’s battery in minutes.

Having a trickle charger can be really helpful when you own an old battery, weak battery or an old car. Basically, a trickle charger releases a small of current which matches the battery’s self-discharge rate which help the battery to reach its fully charged level. They comes really handy when you are having a car parked with fully drained battery. I have gathered some of the Best Trickle chargers for Car battery which can also be used on ATVs, boats, snowmobiles, motorcycles and many more vehicles.

There are various types and sizes of trickle chargers with lots of features like; some charge at faster rate, some are safer options and some with battery indicators. I have gathered all of these best trickle chargers for you with variety of features.

Best Trickle Charger for Car Battery

1- Battery Tender Junior 12 Volt, 750mA Battery Float Chargers

Battery Tender Junior is an affordable trickle charger helps in providing full charge to the battery before switching to float mode which helps in maintaining proper voltage levels for safe storage without overcharging. It is reverse polarity protected which makes it a safer option.

The design of the Battery Tender Junior is easy to use and low maintenance. It can be used on all 12-volt lead-acid, flooded or sealed maintenance free batteries. It has complete 4-step charging program including initialization, bulk charge, and float mode which helps in battery’s power optimization without overcharging it.

The Junior 12V comes with an LED indicator which indicates the state of charge and if the battery voltage drops too far when under load. It has an ISM adaptive charging which will help it to resume to full charger output. There is one interesting feature where when the battery is fully charged it switches to float mode.

2- Battery Tender Plus 12V, 1.25 Amp Powersport Battery Charger

The 12V, 1.25 AMP powersport is another trickle charger by Battery Tender. It provides full charger yo your powersport battery then automatically switches to float mode in order to maintain proper voltage levels without overcharging the battery. It is simple and easy to use trickle charger which charges the battery as fast as 3 amp charger.

The 1.25 Amp battery charger is compatible with lead-acid, flooded, and sealed maintenance free battery. It can be used for long term storage in order to maintain and provide optimal charge. There is an LED indicator which help you indicate the charge level and if the battery voltage drops too far under the load.

It is fully spark-proof during a lead connection which automatically detects the reverse polarity thus ensuring correct locked-in connection before providing power to the battery.

3- BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger

BLACK+DECKER BM3B is used to charges and maintains 12 and 6 volts AGB, GEM and wet batteries. This trickle charger is pretty easy to connect using battery clips and O-ring terminals.

When the battery is fully charged then it automatically stops charging and switching to float mode so that overcharging can be avoided. Moreover, it also comes with a built-in circuit protection guards which help it against overcharging, reverse polarity, or short circuit. It is ETL certified for safety and performance.

There is a built-in mounting bracket which helps to easily place it. It has AC low voltage compensation that helps in ensuring maximum performance when used with an extension cord.

4- Schumacher SpeedCharge 2/6/10 Amp Battery Charger and Maintainer

Schumacher SpeedCharge is a speed battery charger which has 10-amp fast charge self-adjustment feature. It automatically monitors the battery condition and adjust charge rate accordingly so that overcharged can be prevented. It is perfect for car, truck marine, and far equipment, gel cell, and deep cycle batteries.

It also has a 2-amp slow charge which can be used to charge small batteries whereas maintaining large ones for motorcycles, snowmobiles, and lawn tractor batteries. The charger comes with an easy-to-read meter which shows the battery charge status and test results.

Overall, the Schumacher SpeedCharge is very easy to handle and portable to carry around. It comes with a microprocessor control and three charge rates including 2-amp, 6-amp, and 10-amp. Moreover, it gives you an ability to choose the type of battery being charged.

5- Sunforce 5-Watt Solar Battery Trickle Charger

Sunforce 5-watt is a solar trickle charger that helps you to charge your battery anywhere anytime. It can be used for cars, trucks, recreational vehicles, tractors, boats, electric fences, and many more vehicles. Using this solar battery trickle charger is pretty easy to use; you can either use the 12-volt lighter socket and position to pick up maximum daylight or you can use battery clamps to connect directly to the battery.

The great thing about Sunforce 5-watt battery trickle charger is that it is completely weatherproof. It has a sturdy and tough aluminium frame which adds to its durability. There is an integrated blocking diode which helps in protecting the battery against discharge at night.

Sunforce has an Amorphous solar technology which charges in all type of lighting conditions more effectively. You can expect optimal performance even in cloudy or shady environment that without any maintenance cost.

6- Energizer 4 Amp Battery Charger + Maintainer

Energizer 4 Amp is one of the best automatic battery chargers and maintainers on our list. It can be used for car, RV or boat batteries. There is an LCD display given that help you get the exact status of the battery along with battery voltage measurement.

There is an automatic voltage detection which detects 6 volts or 12 volts batteries which help them to charge and maintain them. In order to avoid short-circuit, overcharging or reverse polarity, it comes with a built-in circuit protection. Its 9 step smart battery charger helps the battery to last for longer time as compared to other chargers.

The good thing about this battery charger is that, it automatically adjusts the amperage rate helping your battery to charge and maintain. It comes with a 5 year, repair and replace warranty.

7- SUAOKI ICS7+ 12V Battery Charger/Maintainer

SUAOKI ICS7+ gives you dual charging rate modes namely: 7A for fast charging current which is used for big vehicles and 3.5A Slow charging current that is used for small vehicles. It can be used with all types of 12V lead-acid and 12V lithium ion batteries including wet, AGM, wet, GEL, MF and lithium ion batteries.

Its microcontroller eliminates all type of manual operations while charging as you only have to plug this charger and let it automatically maintain the battery for you. During charging, it keeps on automatically switching from rapid to normal mode using its 9 step charging technique. When the battery is about to get fully charged, it reduces the current and turn itself into a tricker charger which helps the battery to keep fully charged all the time.

The IC7+ is made up of high class ABS along with a protection grade up to IP65 which helps the body to protect against dust and water. It means you can expect optimal performance both in rain and dusty environment.

8- STANLEY BC25BS Smart 12V Battery Charger 

The STANLEY BC25BS is a smart 12V battery charger which help you to jump start your vehicle in less than 90 seconds. It helps you successfully maintain AGM, Gel or Wet batteries with just push of a button. As it is clearly mentioned in the name that BC25BS comes with a smart charging technology which helps you to keep the battery at optimal level of charge and automatically switch from fast charge to normal to trickle charge.

BC25BS is designed in such way that it helps you to monitor and charge your battery quickly that too without compromising on the safety thus provides longevity. It comes with LCD indictor which indicates about battery status and some other relevant information.

9- NOCO Genius G15000 12V/24V 15 Amp Pro-Series Battery Charger

NOCO Genius G15000 is one of the best smart battery chargers which is among the most advanced and safest chargers. It is designed to work with 12 and 24 Volts lead-acid and lithium ion batteries up to 400AH. It can be used as a maintainer for automative, marine, RV, lawn & garden and deep-cycle batteries.

G15000 has a capacity to charge batteries 2X faster than any other charger available in the market. It can be used to jump start dead batteries, repair damaged batteries, power DC devices and it can also work with micro-hybrid start-stop vehicle and CANBUS electrical systems.

It has an ability to automatically detects the reverse polarity, low-voltage or damaged batteries which makes the whole process safer. Its onboard microcomputer keeps on adjusting powers for safer operations.


BLACK+DECKER BC2WBD is one the top rated battery charger available out there having waterproof capability. You can keep this charger connected for any amount of time as it automatically charges and maintain the batteries. It gives you three different types of connections including; battery clamps, battery rings for firm connections, and a 12-volt DC plug.

In order to maximize the performance even when the battery is connected using an extension cord, there is a built-in AC low voltage compensation given. There is also given a built-in circuit protection guards which prevents overcharging, reverse polarity, or short circuit. Overall, it is one of the best trickle chargers on our list.

Trickle Charger Buyer’s Guide

In order to more about Trickle Chargers, I am adding this buyer’s guide so that you can have a clear idea about the Trickle charger.

What is a Trickle Charger?

A trickle charger is used to charge the vehicle’s battery at the rate which is equal to its natural discharge rate. It is needed when car or vehicle is parked for a longer period of time as battery keep on getting consumed. It is suggested that a trickle charger is a must-have device for people who store their vehicles in winter time or use them occasionally.

Trickle charger works at a very slow and steady rate that keeps the battery fully charged without causing any overcharge. There are some models of trickle charger that can be linked to batteries for longer period of time without the risk of overcharing or battery explosion.

Types of Trickle Chargers

There are two main type of trickle chargers which are available in the market; one is Dumb and other is Smart. So let’s talk about them.

1- Dumb

Dumb is the traditional style of trickle charger that comes with lots of cables plugging into a socket. They are available in a very reasonable prices that are reasonably powerful. It is available for almost all type of battery sizes.

2- Smart

Smart type of trickle chargers are the modern one which is why they are a bit expensive as compared to the dumb. It comes with ability to automatically adjust the power as per the battery requirement. Smart trickle chargers are the safer and faster options available out there.

How to Choose the Best Trickle Charger?

There are few things that you need to consider before buying a trickle charger which I have discussed below.

Engine Size

The first thing that you need to consider is the engine size before selecting on the trickle charger. If you have a big car then it is probable that your car will have a bigger battery thus you need a bigger trickle charger. The same principle goes for any other type of vehicle.

You need to make sure that the trickle charger that you are buying is sufficient for your car.

You may consider a following example for general idea;

A 1-Amp trickle charger is enough for a small battery like a motorcycle, golf cart etc.

A 2-amp 6V and 12V trickle charger is perfect for multiple battery connectors and it can help you charge both small and large battery chargers. It has multiple choices which give you a kind of freedom to switch between both demands.

Battery Type

Another thing to consider is the battery type while purchasing a trickle charger for cars. If you have a lead acid battery then it will work with all kind of battery trickle chargers. And if you have a gel or calcium batteries then it works with specific type of battery charger.

If you have deep-cycle battery then you should for a charger with deep-cycle program. If you have a gel or acid battery, then you need a charger that comes with three-stage charging procedure.

If you have a liquid battery then it will work with all type of chargers.

Charging Monitoring

If you are person who store your cars for a whole season then you need to look for a charger with automatic battery-charge monitoring feature which will ensure that your battery is not overcharged and it’s topped off as soon battery level goes down. It will with your battery’s health as well.


This is one of the most important feature to consider and that is having a perfect safety feature that prevent the damage to the battery. Some of the basic safety features include; reverse polarity connection safety, spark-proof, short-circuit protection, overheating and overload protection.

Wall Socket Connector

You need to consider this as well as manufacturers make different type of wall-socket connectors for different countries. So you need to make sure that you purchase a charger with a right kind of wall socket connector.

Trickle Chargers Vs Normal Battery Chargers

There may be some of you who wanted to know about the difference between trickle chargers vs normal battery chargers.

Normally, a trickle charge is used to charge the battery at a rate equal to the natural rate of discharge of a battery thus preventing an overcharge. Although, it can be achieved with an standard charger as well; however, a trickle is important where you store your vehicles for a longer period of time.

Moreover, if you are person who like to charge the battery faster and you don’t store your cars for longer period of time then you should invest in normal battery charger.

Safety Tips

While working with batteries and all, you need to follow few safety tips in order to avoid any unfortunate mishap.

  • Whenever you are working with batteries then always wear safety goggles which will protect your eyes against corrosive lead-acid in-case battery leaks or any explosion occurs.
  • In case you are charging an old battery then you should first fill it with distilled water before connecting the chargers – if the water level is too low.


Q. What is the difference between a trickle charger and a battery charger?

A. A battery charger delivers high-amp electrical current to the batteries thus converting AC power to DC at a very low voltage. Moreover, you can’t leave battery charger stay connected for a longer period of time.Whereas, trickle charger are connected to charge and maintain the battery power at a very low pace. You can leave the trickle charger stay connected for a longer period of time without supervision.

Q. Do it cause a damage to battery if a trickle charger is left connected for a longer period of time?

A. It may vary and depends on the type of charger you are using. There are some trickle chargers that comes with automatic control system that charges the battery accordingly. So you need to look at the trickle charger and see if it comes with this feature.

Q. How long should I connect a trickle charger?

A. Usually, a car battery discharges in 20 hours after being fully charged. You should connect trickle charger 10 to 15 hours after being fully charged. However, if you park your car for week and months then you should connect the trickle charger on. It will keep no charging the battery accordingly.

Q. How to connect a trickle charger safely?

A. Connecting a trickle charger is pretty simple and straight forward. You need to hook up the red and black clamps. You need to look for positive terminal of battery (often red) and connect the red clamp on that terminal. After that connect black clamp to the negative terminal (black) of battery. The add the settings either charging or maintenance mode.


So this was all about Best Trickle chargers for cars and I am sure you must have picked one for yourself. Among all, Battery Tender Junior 12 Volt is the best and carries all the required features that should have in a perfect trickle charger.