Lead-Acid VS Lithium Ice Fishing Batteries: 5 Differences
A practical comparison of battery weight, runtime, technology, long-term cost, and charge time for modern ice fishing electronics.
The Quick Decision
Lead-acid usually wins the initial price comparison. Lithium wins the categories that shape the day-to-day experience on the ice.
Lead-Acid VS Lithium Ice Fishing Batteries: 5 Differences
Ding! Ding! Ding!
In the black corner, weighing in at 45 pounds, the blast from the past,
lead-acid batteries! And in the green corner, weighing in at 3 pounds, the new kid on the block, lithium batteries!
Llllllleeeeets get ready to upgrade!!
Which of these; lead-acid VS lithium batteries, will give you the best day on the ice? We’re glad you asked!
ROUND 1
Lead-Acid VS Lithium: Weight
For the avid ice-angler, one of the most critical factors in the ice fishing equation is the weight of all your equipment.
Live Imaging and 360 Sonar Platforms are bulky and cumbersome by design. Yet, they have entirely changed the ice fishing game.
Powering these trailblazing fish finders requires reliable energy. When comparing the weight of lead-acid and lithium batteries, lithium pummels lead acid.
Product specifications and availability can change. Confirm current Norsk Lithium specifications on each linked product page before purchasing. Lead-acid weights are representative examples and may vary by manufacturer, battery chemistry and construction.
Round 1 goes to Norsk Lithium.
With lithium batteries offering a 70-80% weight savings versus a comparable lead-acid battery, round one goes to lithium batteries!
ROUND 2
Lead-Acid VS Lithium: Run Time
Ice fishing is not for the faint of heart. Getting yourself and gear on the ice takes way too much time and effort to mess around. The last thing you need is the battery’s run time cutting your day short.
Which type of battery will power your fish-finding gear the longest?
The challenge with answering this question is that lead-acid batteries are inherently unreliable. Lead-acid batteries provide a solid amount of power. Initially. But with each use, they suffer degradation.
Further, it’s recommended that you don’t discharge a lead-acid battery beyond 50% capacity. Which is nearly impossible to manage. Do you know anyone who follows this instruction? When a lead-acid battery is discharged below 50%, the battery can be irreversibly damaged. And the voltage provided by the lead acid battery drops as the battery discharges. Sure, you might start with 12.8V at the start of the day, but by lunch, your voltage is declining steadily. So is your total runtime.
Lithium batteries tell a completely different story. Norsk Lithium batteries are designed to be safely discharged up to 100% every time they are used. The final 10% of the charge is just as powerful as the first 10%. The voltage delivered by a lithium battery is consistent from the start of a discharge cycle to the end.
This power dramatically extends your total runtime and, more importantly, the time you get to spend on the ice setting hooks and making memories!
Now, if you have runtime questions about one of the more popular ice electronics units, here’s the biggest haymaker Norsk Lithium lands – the Run Time Calculator. Our innovative tool lets you know precisely how long your lithium battery will power your fish-finding gear. Just plug in the numbers and receive accurate and reliable runtime information.
The hard-working folks at Flux Power tested lithium and lead-acid batteries for running forklifts. They found that lithium batteries power their equipment two-three times longer on a single charge than lead-acid.
Imagine the difference a lithium battery could make for your fish finder!
There’s no question about who wins Round 2. Lithium is far superior to lead-acid when it comes to runtime.
Declining Voltage
Voltage falls throughout the discharge cycle, and protecting battery life often means using only part of the rated capacity.
Stable, Usable Power
A flatter voltage curve helps electronics perform consistently while more of the battery's stored energy remains usable.
Round 2 goes to Norsk Lithium.
There’s no question about who wins Round 2. Lithium is far superior to lead-acid when it comes to runtime.
ROUND 3
Lead-Acid VS Lithium: Technology & Features
Fred Flintstone would have loved lead-acid batteries. They would have brought his foot-mobile right into the 20th century. But that’s not where we live. Lead-acid batteries can only power the one device they are connected to unless you’re willing to risk some fancy wiring. And as we saw in round two, they do that poorly. And unreliably. Norsk Lithium batteries are engineered so you can fully enjoy the outdoors. In the 21st Century.
All our ice-fishing batteries come with a patent-pending integration of dual USB ports. This allows you to power not only your fish finders so that you know where to drill the next hole, but also your cell phone. Shanty lights. Bluetooth speakers. Aerators. And far more.
Our LED battery power indicator lets you know how much juice your battery has left. No guessing. With lead-acid, you need to hook up a voltmeter to your battery to determine how much juice is left. And we’re just getting started. Lithium allows us to push the boundaries of technology continually.
Three rounds into the battle of Lead-Acid VS Lithium Batteries, lithium has an overwhelming 3-0 advantage.
How Norsk Lithium Leverages Technology
Norsk 14.8V portable sonar batteries build on the USB power and battery-meter utility described above with waterproof connections, connected monitoring, and advanced storage control.
Dual IPX8 Waterproof USB Ports
Current 14.8V portable sonar batteries include waterproof USB-A and USB-C ports for phones, lights, cameras, and other accessories. Learn More >
Battery Management Button & Meter
Check state of charge at a glance and manage supported battery functions without connecting a separate voltmeter. Learn More >
Deep Sleep™
Disconnect terminal output during seasonal or short-term storage to reduce phantom draw and help preserve stored power. Learn More >
Norsk Guardian® App
A Bluetooth® Connection allows users to monitor critical battery data and control advanced features from our free mobile app. Learn More >
Round 3 goes to Norsk Lithium.
Three rounds into the battle of Lead-Acid VS Lithium Batteries, lithium has an overwhelming 3-0 advantage.
ROUND 4
Lead-Acid VS Lithium: Cost
When it comes to prices, lead-acid comes out swinging. On the front end, a lead-acid battery is noticeably less expensive than a lithium battery.
Beyond the cost of the single battery, you’ve probably got a charger lying around your garage that will work for a lead-acid battery. Unless you drive a Tesla.
But lead-acid won’t stay standing if this round lasts longer than one ice-fishing season.
Researchers at Philadelphia Scientific found this:
“nearly half of all flooded lead acid batteries don’t achieve even half of their expected life. Poor management, no monitoring and a lack of both proactive and reactive maintenance can kill a battery in less than 18 months.”
18 months! That’s two ice-fishing seasons at best! With lead-acid batteries, you will buy a new battery every other year.
Lithium batteries do cost more on the front end. But they last for thousands of cycles. That trasnlates into YEARS! Plus, they can be fully discharged without damaging the battery.
Beyond that, Norsk Lithium batteries come equipped with an advanced Battery Monitoring System (BMS). The BMS ensures the battery will not be damaged if you attempt to charge it improperly.
Now, due to the chemical composition of lithium batteries, you should pick up a specific charger. And that is an additional cost.
But if you plan on ice-fishing for more than a few years, Norsk Lithium batteries will save you money in the long run.
Round four of Lead-Acid VS Lithium goes to: Lithium
Price Per Season Matters More Than Sticker Price.
A cheaper sticker price does not always mean a lower cost. If lead-acid batteries need regular replacement, you can end up buying over and over again, while Norsk Lithium is rated for 1,000+ cycles of long-term use.
- Usable Energy
- Lightweight Design
- Included Charger
- Advanced Features: Deep Sleep™ & Norsk Guardian®
- Built-in Technology: Dual IPX8 Waterproof USB Ports and Battery Management Button & Meter
- Long-Term Reliability: 4+2 Year Warranty
BATTERY LIFE EXPECTANCY
Round 4 goes to Norsk Lithium
Norsk Lithium provides long-term value and enhances your fishing experience.
ROUND 5
Lead-Acid VS Lithium Round 5: Charge Time
Every battery runs out of juice at some point. The amount of time required to recharge any battery depends on the charger’s output amperage, the battery’s size, and how far the battery has been discharged.
It’s like asking – how long will it take to fill a gas tank? That depends, right?
Still, in general, due to the efficiency of lithium chemistry, you can know how long it will take to recharge a Norsk Lithium battery fully. If you’re looking for the fastest charge times possible, consider this – Norsk Lithium 7A Rapid Charger!
Norsk Lithium offers Rapid Charger compatible with our 14.8V 30, and 50 Ah batteries. Our Rapid Charger output seven amps and reduce charge times significantly.
EXPECTED CHARGE TIMES
| Battery | Standard 3A Charger | Rapid 7A Charger |
|---|---|---|
| 12.8V 10Ah | Under 4 hours 14.2V 3A Standard Charger | Not compatible |
| 12.8V 15Ah | Under 6 hours 14.2V 3A Standard Charger | Not compatible |
| 14.8V 15Ah | Under 6 hours 16.8V 3A Standard Charger | Not compatible |
| 14.8V 20Ah | Under 7 hours 16.8V 3A Standard Charger | Not compatible |
| 14.8V 30Ah | Under 11 hours 16.8V 3A Standard Charger | Under 4.5 hours 16.8V 7A Rapid Charger |
| 14.8V 50Ah | Under 18 hours 16.8V 3A Standard Charger | Under 7.5 hours 16.8V 7A Rapid Charger |
Charger compatibility matters: the 16.8V 7A Rapid Charger is intended only for compatible 14.8V 30Ah and 50Ah batteries. Actual charging times may vary based on remaining battery capacity, temperature, and operating conditions.
Yeah, that’s fast. Don’t worry; you won’t damage your Norsk Lithium battery with one of our 7A Rapid Chargers.
Unlike lead-acid batteries, lithium batteries absolutely LOVE higher amp rates during a charge cycle.
Once fully charged, Norsk Lithium batteries can power some fish finders for days. Just like Dawn Horacek found with our 15Ah lithium battery:
“I love this battery. It was shipped super fast! I used it in my Vexilar for two days and its still shows 4 out of 4 for charge left in the battery. I’m amazed at weight difference compared to my regular Vexilar battery.”
In contrast, charging old lead-acid batteries is a painful slow proposition. Lead-acid batteries take up to five times longer to charge than lithium.
All batteries require proper charging in freezing temperatures. Lithium is no different.
Our BMS will ensure that no damage is done if you start charging your lithium battery before it’s ready.
When your Norsk Lithium battery hits the proper internal temperature, the charger will kick on without issue.
3A Charger
A balanced choice for routine charging of compatible 14.8V portable sonar batteries. View Charger
7A Rapid Charger
Higher output can reduce recharge time on compatible batteries without relying on an improvised charging setup. View Charger
Round 5 goes to Norsk Lithium.
Lithium batteries can charge up to five times faster than lead acid.
Lead-Acid VS Lithium: Decision Time
When the question is Lead-Acid VS Lithium for ice fishing, it’s no contest. Norsk Lithium is kicking acid and taking names.
Norsk Lithium batteries are more powerful, last longer, charge faster, weigh less, and save you money over the long haul.
With the ice-fishing season right around the corner, don’t miss out on this opportunity to upgrade your outdoor experience.
We’re here to answer any questions you may have. Just reach out!
Norsk Lithium powers your passion so you can enjoy the outdoors fully.
Lead-Acid vs. Lithium Battery FAQ
Is lithium better than lead-acid for ice fishing?
For most modern ice fishing electronics, lithium offers lower weight, more usable capacity, steadier voltage, and longer cycle life. Lead-acid generally has the lower upfront price.
Why are lithium batteries lighter than lead-acid batteries?
Lithium chemistry stores more energy for its weight, allowing a battery with comparable usable power to be substantially lighter than a lead-acid alternative.
Does a lithium battery run a fish finder longer?
It often can because more of the rated capacity is usable and voltage remains more stable through the discharge cycle. Actual runtime depends on the battery size, screen, module, brightness, temperature, and connected accessories. Use the Norsk Lithium Runtime Calculator for a system-specific estimate.
Can I use a lead-acid charger on a lithium battery?
Use a charger that is approved for the battery's chemistry and voltage. An incompatible charging profile may not fully charge the battery and can create performance or safety problems.
Upgrade Your Ice Fishing Power
Choose a Norsk Lithium battery sized for your sonar, live imaging system, desired runtime, and complete portable setup.
