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Top Signs Your Lithium-Ion Battery Needs Replacing

A small boat parked at a dock. The boat is plugged into an electrical outlet from a charging station.

Clint Strefling |

Your boat’s lithium-ion battery fuels your time on the water. If your battery unexpectedly malfunctions or dies while you’re out in your boat, it can put a premature end to your day of fun.

It’s best to be proactive about replacing your battery to avoid getting stuck away from shore. At the same time, you don’t want to waste money replacing your battery before its time is up. Thankfully, there are some telltale signs your lithium-ion battery is on its last leg and needs replacing. Here are the top signs to look out for.

How Long Do Lithium-Ion Batteries Last?

A packed lithium-ion battery, with black wires hooking the batteries up to a Battery Management System (BMS) board.

When determining if it’s time to replace your lithium-ion battery, it helps to know their typical lifespan. Lithium-ion batteries usually last about two to three years, but their lifespan can vary based on how you use and take care of them. With good maintenance, quality batteries might last five years or more!

It’s important to keep in mind these numbers indicate the battery’s overall lifespan. As batteries age, their performance and capacity will gradually decline. So, while your lithium-ion battery may technically still work after three years, it may not provide as much power or last as long on a single charge. Depending on how drastic the decline is, you may need to replace your battery sooner rather than later.

Top Signs Your Lithium-Ion Battery Needs Replacing

While age is one indicator of when to replace your lithium-ion battery, other signs can help you determine if it’s time for a new one.

Rapid Discharge Rate

If you need to charge your battery more frequently, or if it seems to lose its charge quickly even when not in use, it might be time for a replacement. As batteries age, their internal resistance increases, which causes them to discharge faster. Replace your battery to reduce the time spent charging so you can get back out there sooner!

Difficulty Holding a Charge

Another sign of an aging lithium-ion battery is difficulty holding a charge. This means the battery may seem fully charged but will drain quickly during use. You may also experience situations where the battery appears partially or even fully drained, and then it suddenly regains power. These are all signs of an aging battery that needs replacing.

Overheating

If your lithium-ion battery is constantly overheating, it could be a sign of internal damage and the need for replacement. As batteries age, their internal resistance increases, causing them to work harder and generate more heat. If you notice your battery is getting excessively hot during use or charging, consider a replacement before it causes further damage.

Physical Damage

Physical damage to your lithium-ion battery, such as cracks or bulging, can also indicate the need for a replacement. This damage can affect the integrity and performance of the battery, making it unsafe to continue using. If you notice any physical damage, replace the battery immediately.

Warning Lights

You can find warning lights or indicators on many modern lithium-ion batteries that signal when you need to replace them. If you notice any warning lights or indicators coming on, it is best to consult your owner’s manual and act accordingly.

Other signs your lithium-ion battery may need replacing include a swollen appearance, strange smells or noises coming from the battery, and decreased performance of your boat’s electronics when using the battery.

Why You Should Replace Your Battery

An older man wearing casual attire. He stands at the edge of his boat and casts a fishing line into the water.

While these signs may not necessarily mean your battery will fail immediately, it is important to address them as soon as possible. Why?

To Prevent Further Damage

Continuing to use an old or damaged battery can damage your boat’s electrical system. This can lead to expensive repairs and potentially leave you stranded on the water if the battery fails.

For Better Performance

Replacing an aging lithium-ion battery will improve the performance and efficiency of your boat’s electronics. You will be able to enjoy longer trips on a single charge without worrying about losing power unexpectedly.

For Cost Savings

Replacing your battery when you see these signs can also save you money. Ignoring these signs and waiting for your battery to fail can result in emergency replacements or repairs, which can be much costlier than planned maintenance.

To Keep Enjoying Your Time on the Water

You don’t want to cut your boating trips short due to a failing battery. By staying on top of these signs and replacing your lithium-ion battery when necessary, you can keep enjoying boating without unexpected interruptions.

Don’t wait until your battery fails to replace it. Keep an eye out for the warning signs and consider replacing your lithium-ion battery when you notice any of them.

Maintaining Your Lithium-Ion Battery

You can take steps to prolong your lithium-ion battery’s life and get the most out of its performance, although all batteries will eventually need replacement. Some tips for maintaining your battery include the following:

  • Unplug your battery once it reaches full charge to prevent overcharging.
  • Keep your battery cool by avoiding extreme temperatures and storing it in a cool, dry place.
  • Use the recommended charging method for your lithium-ion battery.
  • If you won’t be using your boat for an extended period, remove the battery and store it properly to prevent self-discharge.
  • Monitor your battery’s health and performance regularly to catch issues early on.
  • Follow the manufacturer’s maintenance instructions for your specific battery to ensure optimal performance and lifespan.

By following these tips and being aware of the signs that it is time to replace your lithium-ion battery, you can ensure a smooth and enjoyable experience on the water every time. Do not let a malfunctioning battery ruin your day—stay proactive about maintaining and replacing your battery as needed.

If you need a new battery for your boat, drop by PowerHouse Lithium. Our 12V lithium-ion deep-cycle batteries are powerful, reliable, and long-lasting. We also offer a range of other marine battery options. Do not let yourself get stranded on the water—keep your boat powered with a high-quality lithium-ion battery from PowerHouse.