Do battery tenders ruin batteries?

They automatically switch to a safe float voltage level that keeps the battery charged and yet does not do any harm to the battery. In fact, in most cases, this type of charge maintenance will extend the battery's useful life by at least 50%.
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How long can a battery be on a tender?

The normal lifespan of a regular battery is around 5 years. While a maintainer (or tender, if you like) won't extend the life of the battery, it should allow you to get the full lifespan of the battery. Plus, the battery will be completely charged when you go to start the vehicle.
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Do battery tenders make batteries last longer?

Using a battery tender for cars that don't see that much drive time will help extend the life of a battery that doesn't get used often. Battery tenders release a slow trickle of energy into the battery to keep the charge up and maintain the charging capacity of the battery without overcharging it.
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Are battery maintainers worth it?

Do You Need a Battery Tender®? A Battery Tender® battery charger maintains the proper storage charge of a vehicle battery when it's not in use. It's valuable for anyone living in long, cold winters, and it's a necessity for anyone who leaves their vehicle unattended for two weeks or longer.
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Is it good to use a battery tender?

Clearly, the main advantage of battery maintainers is that they won't overcharge the vehicle's battery. This makes them perfect for keeping car batteries charged up while the vehicle is in storage.
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Battery Charger vs Battery Maintainer vs Trickle Charger



Can a trickle charger ruin a battery?

Leaving an unattended trickle charger on for too long might lead to overheating, causing the battery to boil the electrolyte. The outcome would be a dead battery or a worse case scenario— a possible fire/explosion.
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Can you drive with a battery tender?

Their answer is YES it's ok as long as you don't let the engine run for a long time. I also like to add that the Tender has the Reverse Polarity safety feature where it will NOT charge if reverse.
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How often should I use a battery tender?

I hook it just about every time I park it. That way the battery is ready each times want to drive it. The tender keeps the battery ready without overcharging it. if you are driving the car once a week, there is no way you should need to trickle charge the battery.
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What is the difference between a battery tender and a trickle charger?

A trickle charger provides a constant current all the time. It does not know whether the battery is charged or discharged. A battery tender is smart. It will charge the battery only when it needs charged.
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Can I leave a battery charger on permanently?

Re: Battery charger - to leave on permanently? Yes, mine has what is presumably a temperature-controlled fan. It only operates when/if the batteries are down and a relatively sustained period of bulk charging is required.
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Is it OK to leave a trickle charger on all the time?

Some trickle chargers can safely be left connected for months without doing harm to your battery, providing an easy long term battery maintenance strategy. Others may only be left connected for a few days at most. Be sure to check your trickle charger's manual for details.
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Can battery Tenders start fires?

“Any type of battery, whether it's in a drone, toy or even a cell phone, creates heat and if they're on a combustible surface, they can cause a fire.”
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What is the difference between a Battery Tender and a battery maintainer?

"A battery maintainer will only send a charge to the battery when the battery can accept a charge. So, as the battery reaches full charge, the maintainer stops charging the battery. It doesn't send a continuous charge that could lead to overcharging." The Battery Tender Plus is our best overall battery maintainer pick.
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Do I need to disconnect battery to use Battery Tender?

Removing and keeping a battery on a trickle charger is totally unnecessary as long as the battery is fully charged and totally disconnected. You need to know whether YOUR disconnect totally disconnects the batteries. Some DO NOT!
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How do I keep my car battery from dying when not in use in winter?

Tricks for Keeping Your Car Battery Charged in Cold Temperatures
  1. Park your car in the garage, away from the wind. ...
  2. Pause before turning on accessories. ...
  3. Juice it up! ...
  4. Keep your battery free of dirt and debris. ...
  5. Get your battery checked before winter hits.
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Is it OK to start car with trickle charger connected?

Presuming it's a standard "trickle" type battery charger and not a "jump pack", I wouldn't advise attempting to start a vehicle with the charger plugged in.
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Can you leave a trickle charger on a battery all winter?

While some trickle chargers are only meant to run overnight, others can run for months. Remember, most chargers will damage your battery if you leave them plugged in for too long. Some trickle chargers are specifically designed for long-term charging.
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Is a battery tender better than a charger?

Physically, there is virtually no difference between these 2 chargers. Both the Battery Tender and the Battery Tender Plus operate in 3 charge modes, bulk charge, absorption charge, and float charge.
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How often should you use a battery tender on a motorcycle?

I use mine year round on all my bikes. Riding 5 days a week you probably don't need to use it, but for any prolonged inactivity (greater than a week) I would plug it in.
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Why does my battery tender get hot?

Is it normal for a battery charger to become very hot? The answer is, yes. The charger becomes hottest during what we call the "bulk charging phase", which is when most of the battery's capacity becomes recharged.
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Is it OK to leave a car battery charger on overnight?

It is essential to read the instructions with the battery charger to determine whether it is safe to leave it on overnight. However, it is generally recommended not to leave a battery charger on without care for more than eight hours, as this can cause overheating, damage to the unit, or even fire.
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How long can you trickle charge a battery?

If your battery is completely dead, it will take a 1-amp trickle charger 48-hours to recharge it fully; meanwhile, a 2-amp trickle charger could do it in 24-hours. While it's still going to take a while to recharge your battery fully, it's a lot more efficient to have it done in half the time.
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How often should you trickle charge a car battery?

The suggestion is to charge once a month in warm weather and once every three months in cold weather. Another thing to avoid is deeply discharging your battery. Something like running the headlights and stereo with the engine turned off. That'll take months off the battery life every time you do it.
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How long can a car battery sit unused?

Answer provided by

The good news is that the new battery can sit unused for two to four years and still work—as long as it's properly stored and maintained. Your unused car battery can be safely shelved for years if you: Store the battery upright. Keep it in a dry, well-ventilated area.
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