Will A Trickle Charger Charge A Dead Battery?

If you’re wondering whether or not a trickle charger can charge a dead battery, then you’ve found the right article. In this article, not only will you find out how effective trickle chargers are at charging dead batteries, but you’ll also learn why it might not work, how to charge a dead battery with a trickle charger and much more!

So keep reading to find out everything you need to know!

Will A Trickle Charger Charge A Dead Battery?

It’s entirely possible for a trickle charger to charge a dead battery as long as the lifespan of the battery hasn’t run out completely. Batteries typically only last for 3-5 years, so if your battery has died after this time frame, then the chances are you’re not going to be able to charge it back up, no matter which method you use!

How Long Will Trickle Charging A Dead Battery Take?

How long it takes to trickle charge a dead battery depends entirely on how many amps you’re using. For example, a 1 amp trickle charge will take 48 hours to charge a dead battery, whereas a 2 amp trickle charge will only take 24 hours.

And, of course, the higher the amps, the less time it’s going to take to trickle charge your battery back to full capacity.

How To Charge A Battery With A Trickle Charger

Now that you know your trickle charger can charge a dead battery back to full charge, you may be wondering how to do so! Of course, it’s always best to follow the instructions of the manufacturer. With that being said, here’s a rough guide!

Set The Power Specifications

Before anything, you should make sure the amperage and voltage you set are going to charge the battery properly. If you choose the wrong specifications, then you may end up overcharging or undercharging the battery.

Each trickle charger is different, but somewhere there will normally be an area where you can change the amperage until it matches the battery’s needs.

Remember, if you do overcharge your battery, you may end up doing more permanent damage.

An open bonnet and engine, storage battery of a modern car

Position Your Vehicle

Next, you need to make sure you’re placing your car in a safe area. While you’re charging it, fumes may be released, which are toxic and could build up. Ideally, you want to place your car in a well-ventilated area out of the elements.

Once you’ve found a safe area to begin charging your car, you can move on to the next step.

If you have a garage, you can leave a door open, as this is most ideal. However, any driveway can also work too!

Ground The Charger

Before you begin charging your battery, it’s important that you ground the charger. By grounding the charger, you’re going to make charging even safer. If you don’t ground the charger can increase the risk of getting a shock, and in some cases, the battery itself explodes. So grounding is essential.

To ground, the charger couldn’t be simpler. Just attach the grounding clip which comes with your charger to any metal part of your vehicle’s frame that isn’t in contact with the battery, such as the chassis.

Clip The Connectors Onto The Battery

Once the ground has been connected, you can now begin charging the battery itself. To do this, start by adding the red clip to the positive terminal and then the black clip to the negative terminal. Remember, you should always add the positive clip first and then add the negative clip second.

Plug Into Power

Now it’s time to plug in, turn the power on begin charging your battery! Once you’re sure the correct settings are met, you can begin charging. Now that you’re charging, all you have to do it wait!

Watch The Setup

As mentioned, the last thing is to keep an eye on the trickle charger every so often to make sure everything is running smoothly! With newer chargers, you really don’t need to worry about something going wrong; however, if you’re using an older trickle charger, then it could result in the battery being overcharged or undercharged!

Disconnect The Charger

Once your battery has fully charged, the last step is to disconnect the charger again. When you’re disconnecting, you should always disconnect the negative terminal first, followed by the positive terminal.

(Find out why your battery died with an interlock.)


Here are some frequently asked questions that people have about trickle charging a dead battery.

How Long Can You Leave A Battery On Trickle Charge?

With newer trickle chargers, there’s no limit to how long you can leave the battery charging. This is because the new smart trickle chargers will turn off automatically when they reach the max charge and then turn back on when the charge begins to drop again.

Is It Better To Trickle Charge A Dead Battery?

Yes, trickle-charging a dead battery is much better than jump-starting it. Batteries tend to hold slow charges better, and there’s a much lower risk of damaging your battery when trickle charging it. However, if time is of the essence, then it’s still better to jump-start your car.

Can You Trickle Charge A Battery Without Disconnecting It?

As long as you’re using a modern trickle charger, then it’s going to be perfectly fine to charge your battery without disconnecting it! Remember, trickle chargers are designed to change the amount of amperage depending on the battery’s power levels, so it will shut off accordingly!

Will A Trickle Charger A Dead RV Battery?

Just like a car battery, trickle charging will also charge a dead RV battery as well. However, the amount of time it takes to trickle charge a dead RV battery may be longer, depending on the size.

Will A Trickle Charger Charge A Low Battery?

Trickle chargers are going to charge a low battery just as effectively as they charge a dead battery. And not only will trickle charging a low battery bring it back to full charge, but it will also help maintain the charge without overcharging the battery as well!

Can A Trickle Charger Ruin A Battery?

If you’re using a new trickle charger, then the chances are it won’t ruin your car’s battery. However, if you’re using an older charger or a faulty one, then it could result in the battery becoming overcharged and overheating, which may cause permanent damage.

Can A Car Battery Charger Trickle Charge A Battery Overnight?

As long as you’re using a trickle charger with a built-in smart system to detect when the battery is fully charged, then yes, it’s entirely possible to charge a battery overnight. However, even with this, it’s still not recommended just in case of the risk of something going wrong.

Can You Leave A Trickle Charger On All The Time?

Once again, whether you can leave a trickle charger on all the time or not really depends on the type of trickle charger you’re using. Newer models will be much safer to leave on all the time when compared to older models. However, as a rule of thumb, it’s never really a good idea to leave any trickle charger on for weeks at a time or longer.

How Do You Know If A Trickle Charger Is Working?

The easiest way to check whether a trickle charger is working is to look at the display. When you plug it in, you’ll notice the display changing. It will often show how many amps are charging the battery at the time. If you notice that, then you can say with some confidence that the trickle charger is working!

Will A Trickle Charger Charge A Dead Motorcycle Battery?

Just like cars and RV’s a trickle charger is going to be able to charge a dead motorcycle battery as well. And the good news is depending on the size of the battery, it may even charge faster than a car’s battery.

Can You Leave A Trickle Charger On A Battery All Winter?

It’s not advisable to leave a trickle charger on all winter, as not only could it waste a lot of electricity, but it may also end up overcharging your battery. While newer models likely won’t have this problem, if you have an older model or one that can malfunction, then it could cause overcharging.

Is It Better To Trickle Charge Or Jump Start?

Trickle chargers provide a more sustainable charge, so it’s recommended to trickle charge your car where possible. Of course, sometimes speed is of the essence, though and when this is the case, then jump starting is preferable.

How Long To Trickle Charge A Car Battery At 6 Amps?

If you’re charging a standard 48amp battery with a 6 amp charger, then you can expect it to be fully charged after 8 hours.

How Long To Trickle Charge A Car Battery At 10 Amps?

If you’re charging a standard 48amp battery with a 10 amp charger, then you can expect it to be fully charged after 5 hours.


As you can see, trickle charging can absolutely recharge a dead battery, and you can expect most trickle chargers to charge a battery within 24-48 hours, depending on the amperage set.

On top of this, you should also make sure you’re keeping an eye on your trickle charger to ensure it doesn’t overcharge the battery at any point.

If you liked this article, make sure you check out the rest of the website! Otherwise, have a great day!

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