What Is An Automatic Battery Float Charger? (Why You Need One)

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What is a battery charger float charge?

Just like any appliance that uses electricity, a battery that is used too often, or not used often enough, will lose its power.

The same thing will happen if the battery is left in a car that is not used for months at a time…. The battery will slowly lose its charge, and the car will not crank when it is needed the most.

This is where the automatic battery float charger comes in handy…. It is used to keep the battery charged and ready to go, and it can be left to charge all the time, or it can be used when needed.

An automatic battery float charger is a circuit that continuously charges a secondary battery, such as a battery used as a backup power source for security systems.

How does a float charger work?

The charger monitors the voltage of the battery and continually adjusts the charging current in response to the charging and discharging of the battery.

The charger may also adjust for changes in the supply voltage and temperature…. In the event of a power failure, the charger will switch to battery power and maintain the battery at its fully charged state.

Also called an intelligent charger, an automatic battery float charger uses advanced technology to monitor and recharge such batteries over a long period, thereby making them last longer.


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An automatic floating charger is the best way to go if you want to keep your battery at the ready in case of an emergency, or if you don’t have the time to tend to your battery manually to make sure it stays charged.

This provides a long-term storage solution…. Currently, there are two types of battery float chargers available on the market…. A “smart charger” and a “trickle charger”.

The Smart Float Charger is a newer type of battery float charger that is faster and more efficient…. It uses sensor and microprocessor technology to convert a standard outlet into a safe, high current charger.

What is Reverse Polarity?

Reverse polarity is basically putting things into a battery or charger backward….  All batteries are designed to work with a voltage input that is NOT the reverse polarity of the battery.

So if you hook up a battery charger to a battery in reverse, your battery will be damaged, and the charger will be damaged.


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The battery is designed to take in a charge in one direction, and when you hook it up backward, it will damage the battery.

The charger, on the other hand, will be damaged when you hook it up the wrong way because the charger is designed to take charge in one direction.

You don’t have to worry about this with clever LST Trickle Battery Charger Automatic Maintainer because it is smart enough to tell you if you have hooked it up wrong and it won’t allow you to proceed.

So…… Why Do You Need A Floating Battery Charger?

An automatic, maintenance-free battery float charger can extend the life of your car, motorcycle, truck, and other power sports batteries by keeping them fully charged with little or no maintenance.

Over time, a battery’s charge will naturally deteriorate because it isn’t being used.

The float charging technique is a great way to keep storage batteries fully charged without having to deal with lead-sulfate build-up, which might otherwise occur if the battery were left in a low state of charge.

An automatic battery float charger is a fantastic idea and the smart way to keep your batteries charged, especially for all of the equipment that you put away for winter hibernation.

When spring comes around you will have no worries about flat batteries and just start up again where you left off.

Will a battery float charger charge a dead battery?

Yes, a battery float charger will charge a dead battery…. But it will take longer to do so. A battery float charger is designed to keep your car’s battery at full charge while the car is off.

This prevents “sulfation,” which occurs when a battery loses its ability to hold a charge because of chemical buildup on its plates.

The sulfation process can result in a dead or weak battery that won’t start your car or run properly under load…. A float charger prevents this by keeping the battery at full charge at all times, regardless of whether it’s being used or not.

What is the difference between a float charger and a battery maintainer?

There are many different types of chargers available on the market today, but two of the most common are float chargers and battery maintainers.

Both are designed to charge your vehicle’s battery, but there are some differences between them that you should be aware of before making a purchase.

Float Chargers

Float chargers are typically used by those who own motorcycles or ATVs that don’t get used often…. They’re also often used by those who live in areas where winters are harsh and snowfall is common.

The idea behind these chargers is that they will maintain your battery while it’s in storage so that when you go to use it again, it’ll be fully charged when you turn over the engine.

In order to do this, float chargers must be connected to your battery at all times while it’s not in use…. If you don’t have an extra 12V outlet near where you store your vehicle, then a float charger may not work for you.

Battery Maintainers

A battery maintainer is an electrical device that plugs into your vehicle’s cigarette lighter and provides power to your vehicle’s battery.

It works by sending small amounts of electricity to the battery on a continuous basis, which keeps it topped off and ready to go at all times…. This ensures that you do not have to worry about going to start your car one morning only to find that it won’t turn over because the battery is dead or weak.

The main benefit of using a battery maintainer is convenience:

You never have to worry about killing yourself if you leave your lights on overnight or if someone else forgets to turn off their headlights after using them in your driveway before they leave — all while still getting better performance than traditional trickle chargers provide.

Will a automatic battery float charger charge a battery?

The answer is yes, a automatic battery float charger can charge a battery…. In fact, it’s the only type of charger that should be used with a deep cycle battery.

A deep cycle battery is designed to be discharged and recharged many times without damage…. This means it can be left for long periods of time without being connected to a vehicle or other power source.

The only exception to this rule is when you want to use your vehicle on a journey and need the battery to start the engine.

If you managed to disconnect the battery from its connection in your car while it was turned off, then yes, it will charge up again when you turn on the ignition key as long as you have enough power in your alternator and battery bank.

How long can you leave a float charger on?

The answer to that question is: It depends…. The amount of time you leave a float charger on is dependent on the type of battery you have, how much charge it can hold, and how often you use your vehicle.

Some batteries, like those found in motorcycles or ATVs, are designed for short bursts of power…. These types of batteries are not meant to be stored for long periods of time and will only hold 20-30 percent of their charge when left idle for more than a week.


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Other types of batteries, like those found in lawnmowers or tractors, are designed to be stored idle for several weeks at a time without losing much capacity…. These types of batteries can maintain 90 percent of their charge after sitting idle for several weeks at a time.

How do you use an automatic battery float charger?

The most common type of automatic battery float charger is the smart charger…. A smart charger monitors the charge level of your vehicle’s battery and automatically switches to float mode once the battery is fully charged.

In this mode, the charging device switches off when it senses that the battery’s voltage has reached a predetermined level…. This prevents overcharging and damage to your car’s electrical system.

Once you have installed the smart charger, you can leave it on all the time or turn it off when your car isn’t in use to save energy…. You can also manually toggle between modes if needed.

Many vehicles come with built-in chargers that are designed to work with your car’s alternator, but these devices do not always function properly.

Automotive experts recommend replacing these devices with a professionally installed smart charger that is specifically designed for your vehicle model, as they are more effective at maintaining a full charge in your car’s battery than standard chargers.

What is the difference between a trickle charger and a float charger?

The main difference between a trickle charger and a float charger is that the former charges the battery at a constant rate, while the latter keeps your battery charged at a safe level.

Trickle chargers are used to maintain batteries that aren’t being used, so they can be ready to go when needed.

They’re typically used on motorcycles, lawn mowers and other vehicles that are stored for long periods of time without being driven.

Float chargers are used on vehicles that will be driven regularly but not often enough to keep the battery fully charged.

A float charger will maintain a steady voltage level in the vehicle’s battery until it needs to be recharged again…. The advantage of using this type of charger is that it doesn’t require any attention from the driver except when driving the car.

The main disadvantage of trickle chargers is that they can damage batteries if used for too long or if connected incorrectly…. Both types of chargers should only be connected when necessary, as leaving them connected for extended periods can overcharge your battery or cause damage from overcharging.

How long does it take to charge a battery with a float charger?

The answer depends on the battery type and size, the charger type and size, and the type of charger…. Typically, the bigger the battery and charger, the longer it will take to charge.

For example, if you have a large lead acid battery that is fully discharged and you are charging it with a small 10 amp car charger, it may take several hours to fully charge the battery…. A larger capacity charger may be able to do this in less than an hour.

If the battery is a lead-acid type (as in most automobiles), it will take about 12 hours to fully charge a dead battery.

The reason it takes so long is because lead-acid batteries are designed to be charged in stages…. The first stage is called bulk charging, and it uses a large amount of current to get the battery up to around 70% capacity.

At this point, the charge controller switches into absorption mode, which uses less current but keeps the charger on until the battery reaches 100% capacity.

This absorption mode lasts for a few hours (sometimes longer) and during this time it will use very little current from your solar panels or wind turbine…. Once it’s done, you can remove your float charger and enjoy your newly charged battery!

Is it OK to leave a battery maintainer on all the time?

Most batteries are designed to be charged and discharged repeatedly without harm, but they do have a lifespan…. The more you charge them, the sooner they’ll need to be replaced.

A battery maintainer can help with this problem by charging your battery while you’re not using your vehicle…. However, if you leave it connected too long, it can overcharge or undercharge your battery, which will ruin it.


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The answer to your question depends on how long you want to keep your vehicle sitting idle for an extended period of time.

If you want to use it as soon as possible after being stored away from regular use (such as during winter), then it’s best not to leave a battery maintainer on all the time because this could increase acid build-up in the cells and cause corrosion issues when you finally start driving again.

If you plan on keeping your car in storage for several months or longer, then connecting a battery maintainer may be fine because it will keep everything sufficiently charged until it’s needed again.

Which is better a battery tender or a trickle charger?

There is a lot of confusion about the difference between a battery tender and a trickle charger…. The main difference is that a battery tender only charges when necessary, while a trickle charger will charge your batteries whether they need it or not.

The best way to understand the difference between these two products is by looking at how they work…. A battery tender is an automatic charger that detects when your battery needs recharging and then sends power to it until it reaches full capacity.

This can be done manually by plugging in the charger or by using an automatic device that detects when your battery needs charging and does so automatically.

A trickle charger works differently because it does not have an automatic shut off feature like a battery tender does…. Instead, it continuously sends electricity to your battery until you stop it yourself or unplug it from the outlet where it is plugged in.

If you leave it on for too long without using any energy from your car (like when you are parked at home), then this can damage your battery over time because there isn’t enough energy being used up by your vehicle to keep up with what’s being sent into it through the trickle charger.

Do trickle chargers ruin batteries?

The short answer is “no,” but it’s not that simple.

Trickle chargers are designed to charge batteries at a low rate, which means they won’t overcharge your battery or damage it…. Some car manufacturers specify that you use a trickle charger between each drive.

Some people believe that trickle chargers can ruin batteries by “overcharging” them, which isn’t true…. Trickle chargers only charge batteries at a low rate to avoid overcharging, and they’re designed to stop charging when the battery reaches 100% capacity.

The problem with using a trickle charger after every drive is that it tends to keep your battery at 100% capacity for long periods of time, which isn’t good for the battery itself…. The best way to charge your car battery is by driving it regularly (at least once every two weeks).

What does a 12 volt float charger do?

A 12 volt float charger is a type of battery charger used to maintain a battery at its fully charged state…. It is designed to keep batteries topped off, not to bring them back from dead.

What Does a 12 Volt Float Charger Do?

A 12 volt float charger maintains the charge on a battery without overcharging it…. This keeps your vehicle’s battery at its optimum voltage and prevents damage that can occur when the battery is left in a discharged state for an extended period of time.


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The term “float” means that the charger will keep the charge level at or near 100 percent while the engine isn’t running (as long as it’s plugged into an outlet).

When you turn on your car’s ignition key, the alternator will kick in and provide enough juice for charging if needed, bringing the system back up to full capacity within seconds or minutes depending on how much charge was lost through normal use.

Can I leave trickle charger on overnight?

Trickle chargers are designed to be left on for days or weeks at a time…. The only time you should turn off your trickle charger is if you go on vacation and will be away from home for more than two weeks…. Otherwise, it’s perfectly safe to leave them on all the time.

In fact, some manufacturers recommend leaving their chargers connected when not in use so that they’re always ready to go when needed.

Can you leave a trickle charger on a battery all winter?

A trickle charger is a device that keeps your car’s battery charged in storage…. It’s best to use a trickle charger for the winter months because it prevents your battery from going dead, which can damage the battery and the vehicle itself…. The trick is to use it properly.

The charge rate is so low that it doesn’t cause any damage to the battery, even if you leave it connected for months at a time…. And because the charge rate is so low, it will take months for the battery to fully charge using this method.

Is it better to charge a car battery fast or slow?

The answer is pretty simple: It’s better to charge a car battery slowly.

The reason this is true is because charging a battery too quickly puts a lot of strain on the battery and can cause it to overheat and burst into flames…. Also, charging a battery too quickly can make it lose its ability to hold a charge.

If your battery is in good shape and if you have a charger with an automatic shut-off feature, then it’s perfectly safe to charge your car battery at full speed.

The charger will automatically stop charging when the battery reaches its maximum capacity, so there’s no risk of damage to your vehicle or causing an explosion by overcharging.

However, if your battery is damaged or if you don’t have a smart charger then slow charging may be safer as well as more efficient in terms of energy usage and cost savings over time.

Can you trickle charge a car battery while it is connected?

Yes, you can trickle charge a car battery while it is connected…. However, you need to be careful about the voltage and amperage of the charger.

In general, you should not attempt to charge a battery that is in the same vehicle as you…. This can cause damage to sensitive electronics on your vehicle, including the charging system itself.

If you have a spare battery or an external battery charger that can handle 12 volts and has at least 1 amp of output power, then it is safe to trickle charge your car’s battery while it is connected.

You’ll need to connect your charger to the positive terminal of the car’s battery first and then connect it to ground (either directly or through something else).

This will allow current to flow from one terminal of the charger through both sides of the car’s battery and back out through ground again.

In summary, when it comes to automatic battery trickle chargers for automotive, motorcycles, automobile, riding lawn mowers, lawn tractor, ATVs, RVs, watercraft, power sport, scooter, snowmobiles, cars, camper, trolling motor, boats, etc, there’s no better choice than the LST Trickle Battery Charger Automatic Maintainer.

This is an electronic device that’s made to maintain the proper charging level of a flooded lead-acid battery…. Once the device has been installed, it doesn’t require any human intervention for it to do its job.

It doesn’t require anything from you except to connect the battery to the charger and to plug the charger into an AC outlet.

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