Top 5 Lithium Batteries for Ice Fishing: Buyer's Guide

Imagine this: You’re bundled up, the ice is thick, and your fish finder suddenly goes dark. That sinking feeling is the worst part of ice fishing! We all love the quiet thrill of the catch, but unreliable power can ruin the best days on the hard water. Traditional batteries often struggle in the brutal cold, leaving anglers frustrated and powerless.

Choosing the right lithium battery for your ice fishing setup is a game-changer, but navigating all the technical terms—Amp hours, Cold Cranking Amps, and lifespan ratings—can feel overwhelming. You need reliable power that lasts all day without weighing down your gear. This post cuts through the confusion. We will break down exactly what you need to know to select a powerful, lightweight lithium battery that keeps your electronics running from sunrise to sunset.

Keep reading, and you will learn how to match the perfect lithium battery to your specific needs, ensuring you never miss a bite due to dead power again. Let’s dive into making your next ice fishing trip your most reliable one yet!

Top Lithium Battery For Ice Fishing Recommendations

No. 1

GOLDENMATE 12V 10Ah LiFePO4 Lithium Battery, 5000+ Deep Cycles, IP67 Waterproof Lithium Iron Phosphate Battery, Built-in BMS, Ideal for Power Wheels, Solar, Marine, Fish Finder, Ride-on Toy, Camping

[Superior Performance]: Discover exceptional performance with our 12V 10Ah LiFePO4 battery. Designed for power wheels and similar applications, it offers high energy density, a long cycle life, and superior safety features. The built-in BMS (Battery Management System) protects against overcharging, over-discharging, over-current, and short circuits. Additionally, the battery's low self-discharge rate allows for hassle-free storage of up to one year. (Note: This battery is not intended for vehicle starting purpose)
[IP67 Waterproof & Versatile Applications]: Power your devices with the newly upgraded GOLDENMATE 12V 10Ah LiFePO4 lithium battery, now featuring IP67 waterproof protection. Weighing just 3.3 pounds, it’s lightweight and perfect for a wide range of applications, including emergency lighting (LED strips, etc.), 12V routers, RV and outdoor camping, kids’ ride-on toys, power wheels, fish finders, kayaks, small UPS systems, backup power, ham radios, home alarms, remote cameras, fire security systems, and solar/wind power setups
[5000+ Cycles, 10-Year Lifespan]: Unlike traditional lead-acid batteries, which typically offer a 3-year lifespan and 300-500 cycles, the GOLDENMATE 12V 10Ah LiFePO4 battery stands out with an impressive 10-year lifespan and over 5000 deep cycles. While the initial cost of LiFePO4 batteries may be slightly higher than that of lead-acid alternatives, their extended lifespan and superior cycle performance lead to a lower overall cost of ownership. Choosing the 12V 10Ah LiFePO4 battery ensures long-lasting efficiency and delivers significant savings in both time and money
[Flexible Expansion, Reliable Recharge]: Need more power? The GOLDENMATE 12V 10Ah LiFePO4 battery offers flexible expansion options, allowing you to easily increase voltage or capacity by configuring the batteries in series or parallel. You can connect up to four batteries in series or parallel, achieving a total capacity of up to 51.2V 40Ah. With a continuous discharge capability of up to 10A, this 12V waterproof battery is well-suited for demanding off-grid applications such as fish finders, camping lights, and kids' ride-on toys
[Easy to Recharge and Maintain]: The New GOLDENMATE 12V 10Ah LiFePO4 battery is simple to recharge using a compatible LiFePO4 battery charger, solar panel with MPPT, or generator. With a maximum charge current of 5A, it’s an excellent choice for users who prioritize quick charging times. Unlike lead-acid batteries, this lithium battery requires no regular maintenance—no need for water refills or other upkeep. This makes it a convenient, hassle-free solution for all your energy storage needs

No. 2

NERMAK 12V 10Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Rechargeable Battery for Solar/Wind Power, Lighting, Power Wheels, Ride-on Toy, Fish Finder and More, Built-in 10A BMS

【Superior Performance】: Lithium iron phosphate battery has high energy density, Long cycle life, Good safety performance, No memory effect, etc. NERMAK LiFePO4 battery has built-in BMS protection to prevent overcharge, Over-discharge, Over-current and short circuit, and very low self-discharge rate. (Not motorcycle starter battery)
【Long Cycle Times】: Lithium batteries 2000 + cycles no problem while the traditional lead-acid batteries only 200-300 cycles, More safety and environmentally friendly than lead-acid batteries.
【Widely Uses】: Widely uses in most areas such as: Emergency Lighting (LED strip etc), 12V router, RV/outdoor camping, kids ride on toy car, power wheels, fish finders, small UPS(Less than 200W),backup power, Ham Radio, Home Alarm, Cellular remote camera, Solar/Wind power and more...
【Expansion and Recharge】Can be connected in series or parallel, in series, Up to 4 identical batteries can be connected，Quick charge by 6A , and heavy-duty output discharge up to 10A continuous and 2C Pulse.
【Warm Note】: 1* 12 Volt Replacement lithium ion battery，12 months warranty, If you have any question for our product, Contact us: click the "Ask a question" on our storefront or in "YOUR ORDER" options click the "contact seller" (please use LiFePo4 special charger, with fully automatic SLA charger may not be fully charged)

No. 3

GOLDENMATE 12V 10Ah LiFePO4 Lithium Battery(2 Packs), 5000+ Deep Cycles, IP67 Waterproof Lithium Iron Phosphate Battery, Built-in BMS, Ideal for Power Wheels, Solar, Marine, Fish Finder, Ride-on Toy

[Superior Performance]: Discover exceptional performance with our 12V 10Ah LiFePO4 battery. Designed for power wheels and similar applications, it offers high energy density, a long cycle life, and superior safety features. The built-in BMS (Battery Management System) protects against overcharging, over-discharging, over-current, and short circuits. Additionally, the battery's low self-discharge rate allows for hassle-free storage of up to one year. (Note: This battery is not intended for vehicle starting purpose)
[IP67 Waterproof & Versatile Applications]: Power your devices with the newly upgraded GOLDENMATE 12V 10Ah LiFePO4 lithium battery, now featuring IP67 waterproof protection. Weighing just 3.3 pounds, it’s lightweight and perfect for a wide range of applications, including emergency lighting (LED strips, etc.), 12V routers, RV and outdoor camping, kids’ ride-on toys, power wheels, fish finders, kayaks, small UPS systems, backup power, ham radios, home alarms, remote cameras, fire security systems, and solar/wind power setups
[5000+ Cycles, 10-Year Lifespan]: Unlike traditional lead-acid batteries, which typically offer a 3-year lifespan and 300-500 cycles, the GOLDENMATE 12V 10Ah LiFePO4 battery stands out with an impressive 10-year lifespan and over 5000 deep cycles. While the initial cost of LiFePO4 batteries may be slightly higher than that of lead-acid alternatives, their extended lifespan and superior cycle performance lead to a lower overall cost of ownership. Choosing the 12V 10Ah LiFePO4 battery ensures long-lasting efficiency and delivers significant savings in both time and money
[Flexible Expansion, Reliable Recharge]: Need more power? The GOLDENMATE 12V 10Ah LiFePO4 battery offers flexible expansion options, allowing you to easily increase voltage or capacity by configuring the batteries in series or parallel. You can connect up to four batteries in series or parallel, achieving a total capacity of up to 51.2V 40Ah. With a continuous discharge capability of up to 10A, this 12V waterproof battery is well-suited for demanding off-grid applications such as fish finders, camping lights, and kids' ride-on toys
[Easy to Recharge and Maintain]: The GOLDENMATE 12V 10Ah LiFePO4 battery is simple to recharge using a compatible LiFePO4 battery charger, solar panel with MPPT, or generator. With a maximum charge current of 5A, it’s an excellent choice for users who prioritize quick charging times. Unlike lead-acid batteries, this lithium battery requires no regular maintenance—no need for water refills or other upkeep. This makes it a convenient, hassle-free solution for all your energy storage needs

No. 4

GOLDENMATE 12V 16Ah LiFePO4 Battery, IP67 Waterproof, 12V Lithium Battery w/ 5000+ Deep Cycles, Built-in BMS, Premium Lithium Iron Phosphate Cell, Ideal for Solar, Marine, Fishfinder, Off-grid camping

[Superior Performance]: Discover superior performance with our upgraded 12V 16Ah LiFePO4 battery. This rechargeable lithium battery offers impressive energy density, long cycle life, and advanced safety features. Equipped with a built-in 16A BMS protection system, it guards against overcharging, over-discharging, over-current, and short circuits. Additionally, its low self-discharge rate ensures trouble-free storage for up to one year
[5000+ Cycles & Long Lifespan]: Our battery is built with high-quality lithium cells that are designed for maximum efficiency and durability. Engineered to last, it delivers over 5,000 charge cycles, significantly outlasting conventional battery technologies. This ensures long-term reliability, providing you with consistent performance for years to come, whether you're using it for daily applications or long-term storage. Enjoy superior energy retention, faster charging, and an extended lifespan, making it the ideal choice for those seeking dependable, long-lasting power
[Lightweight & IP67 Waterproof]: Power your devices with the GOLDENMATE LiFePO4 deep cycle battery. Weighing just 3.97 pounds, it offers exceptional portability, making it perfect for a wide range of applications. Whether you're powering emergency lighting (LED strips, etc.), a 12V router, RV or outdoor camping setups, small UPS systems, kids' ride-on toys, power wheels, fish finders, kayaks, home alarms, cellular remote cameras, fire security systems, or solar/wind power systems, this battery delivers reliable performance in any setting. Plus, its IP67 waterproof rating ensures it’s fully protected from dust and water, making it ideal for both indoor and outdoor use
[Flexible Expansion & Reliable Recharge]: Need additional battery capacity to power your devices? Our 12V marine battery offers the flexibility to expand with ease. You can configure multiple batteries in series or parallel to increase voltage or capacity according to your needs. Connect up to 8 batteries in either configuration to achieve a total capacity of up to 51.2V 32Ah or 25.6V 64Ah. Designed for high-performance, this deep cycle battery supports continuous discharge of up to 15A, making it the perfect choice for demanding off-grid and outdoor applications. Whether you're powering large systems or need reliable backup power, this battery is built to deliver
[Easy to Recharge & Low Maintenance]: The GOLDENMATE LiFePO4 battery is designed for effortless recharging. Simply use a compatible LiFePO4 battery charger, solar panel with MPPT, or a generator for fast, efficient charging. With a maximum charge current of 8A, this 12V deep cycle battery ensures quick recharge times, making it ideal for those who need reliable power in less time. Additionally, unlike traditional lead-acid batteries, this lithium battery requires no regular maintenance—no need to add water or perform other upkeep tasks. It’s a convenient, hassle-free solution for all your energy storage needs

No. 5

12V 15Ah Lithium Battery LiFePO4 Deep Cycle Battery, Up to 8000+ Cycles Rechargeable Batteries With Charger, 12 Volt Lithium Battery for Fish Finder, Power Wheels, Mobility Scooter, Lighting and More

Lightweight and Easy to Carry: Akiisolo 12.8V 15Ah LiFePO4 battery is 67% lighter than traditional lead-acid options, making it suitable for portable power needs like RV camping, off-grid adventures, or outdoor activities. Its compact design fits seamlessly into your setup without compromising power
Unmatched Longevity and Durability: With over 2000 cycles at full capacity (100%DOD) and up to 8000 cycles at partial capacity (50%DOD), Akiisolo LiFePO4 lithium battery delivers up to 10 years of dependable performance. This is 4x the lifespan of lead-acid batteries, making it an investment that pays for itself
Safe and Reliable Performance: Designed with advanced LiFePO4 technology, this lithium battery offers exceptional stability and dependable operation, even in extreme conditions. With a wide temperature range of -20C to +60C, it performs reliably in both hot and cold environments. The flat discharge curve ensures consistent voltage for up to 95% of its capacity, delivering steady and reliable power when you need it most
Flexible Configurations for Your Needs: This 12v battery supports parallel and series connections, allowing you to combine multiple units to increase voltage or capacity based on your specific requirements
Come with A Compatible Charger: Pair this lifepo4 battery with a charger for optimal performance. Enjoy fast and efficient charging, so your battery is ready when you need it. The low self-discharge rate ensures it retains power even after months of storage

No. 6

ZapLitho Upgraded 12V 22Ah Lithium Battery LiFePO4, LCD Voltage Diaplay & 30A BMS, Deep Cycle Grade A Cells, Lightweight Lithium Iron Phosphate Battery for Fishfinder, Ham Radio, Camp, Solar, Off Grid

[LIGHTWEIGHT & PORTABLE & SUITABLE FOR OUTDOOR MOBILE OPERATION] Weighing just 5.5 pounds(3"D x 7.1"W x 7"H), its lightweight & compact size design makes it a breeze to carry, fit into tight spaces, and position anywhere. Special potting process to ensure that the internal components are fixed and not wobbly. Suitable for mobile operation scenarios, the vertical, flat, and sideways battery can be placed. Ideal for camping trips, emergency power needs, or any situation where ease of transport matters.
[SAFETY & RELIABILITY BMS & LCD Voltage Display] This deep cycle battery adopts Grade A Battery Cells, high standard reliable capacity, low internal resistance, good consistency, high safety, and low self-discharge rate. Equipped with a Built-in BMS, this 12V lithium battery safeguards against overcharge, over-discharge, over-current, and short-circuit scenarios. It maintains a perfect balance between battery cells, ensuring optimal performance and longevity.
[LONG LIFETIME & DEEP CYCLES LITHIUM BATTERY] Say goodbye to frequent replacements! This 12V 22Ah LiFePO4 battery offers a remarkable deep cycle life. LiFePO4 cells with 4,000+ cycles. Lithium iron phosphate batteries outperform lead-acid batteries that only have 300-400 cycles. Typically, 12V LiFePO4 batteries have a lifetime that lasts 4~10 times longer than SLA.
[SUPPORT CAPACITY EXPANSION, 4P4S] Standard M5 terminal, this lithium iron phosphate battery offers flexible connectivity options. Expand your power capacity effortlessly by connecting up to 4 identical batteries in series or unlimited batteries in parallel. Tailor your power system to match your specific requirements. Up to 4P4S is recommended for series-parallel systems.
[ENDLESS APPLICATIONS & RESISTANT TO LOWER TEMP THAN SLA] This 12V Lithium Iron Phosphate battery can be used for your UPS, Ham Radio, for Echomap, Fish Finder, Live Scope,Ride On Toy, Backup Energy needs, and RV electronics. It also works great for camping gear, solar systems, portable speakers, boat electronics, lights, and other accessories on vehicles. LiFePO4 performs better in low-temperature conditions than SLA, such as capacity retention, internal resistance stability, charge-discharge efficiency, cycle life, and safety.

No. 7

ERYY 12V 15Ah LiFePO4 Lithium Battery with BMS & LCD Voltmeter, Grade A Cells, 4000+ Cycles, Lightweight Rechargeable Deep Cycle Battery for Fish Finder, Camping Light, Solar System, Ham Radio

【12V 15Ah Lithium Battery - The Ultimate AGM Replacement for Solar & Off-Grid Power】Tired of bulky lead-acid batteries?Our 12V 15AH LiFePO4 Deep Cycle Battery outperforms AGM batteries in every way.At just 3.4 lbs(vs AGM's 10+ lbs),this compact powerhouse delivers 3x lighter weight and 30% smaller size for RV gears,boats, and solar setups.Built to last 4000+ cycles (10x AGM lifespan), this 12V LiFePO4 Lithium Battery charges 3x faster with 98% efficiency - perfect for solar panels or backup power.Its stable performance works flawlessly in extreme temps (-4°F to 140°F). Upgrade to the 12V LiFePO4 Battery Replacement today.Spend less time charging,zero maintenance,and enjoy 10-year reliability
【Power Your Adventures with Deep Cycle LiFePO4 Battery & Smart BMS Protection】 Engineered for endurance, our 12V 15Ah rechargeable LiFePO4 battery delivers reliable deep-cycle power with built-in 15A BMS (Battery Management System). The intelligent BMS safeguards against overcharge/over-discharge, temperature extremes, and short circuits while balancing cells for optimal performance - perfect for marine LiFePO4 battery applications where safety matters most. Ideal for: ✓ Kayak trolling motors - IP65 Water-resistant design handles splashes ✓ Fish finders - Steady 12V output for 12+ hour fishing trips
【Ultra-Reliable 12V LiFePO4 Battery with Premium A-Grade Cells】 Our 12V Lithium iron phosphate battery is engineered with 4 top-tier A-grade LiFePO4 cells for superior energy density and longevity. Each cell undergoes rigorous testing to ensure consistency, low internal resistance, and 4,000+ cycles – ideal for Electric Tools, UPS, and Toys & Models. Perfect For: ✓ Ride-on toys – Safe, vibration-resistant power for 3-5hr kid’s playtime ✓ Camping gear – Runs LED lights/portable fridges 2x longer than lead-acid ✓ Security cameras – 24/7 backup power with zero maintenance
【4P4S Expandable Power for Ultimate Versatility】Unlock custom power with our 12V portable deep cycle LiFePO4 lithium battery! Carefully series/parallel connect up to 4P4S (48V/60Ah max) using identical 12V trolling motor battery to boost voltage (24V/36V/48V) or extend capacity. Ideal for scaling systems without replacing equipment. Scale Your System Carefully: ✓ Lawn mowers – Parallel-link batteries for 8+ hours runtime ✓ RV accessories – Power LiFePO4 RV battery systems & 2000W inverters. For safe expansion, use batteries with matching capacity(15Ah), voltage(12V), BMS(15A), and brand(ERYY). Prior to series or parallel connection, each battery shall be fully charged(≈13.4V resting voltage)
【Pocket-Sized Powerhouse: 12V 15Ah LiFePO4 Rechargeable Battery】 Power up your adventures 3 smart ways( 3-in-1 Charging Freedom): ✓ LiFePO4 Charger (RECOMMENDED) - Fast 3hr charge via 14.2V±0.2V input ✓ Solar Panel + MPPT Controller - Daytime solar harvesting (32°F-113°F compatible) ✓ Generator + LiFePO4 Charger - Emergency off-grid power with ≤15A safety Charge Smart: Use a LiFePO4-specific charger for optimal safety and lifespan

No. 8

SEFEPODER 12V 20Ah Lithium LiFePO4 Deep Cycle Battery, 4000 Cycles Rechargeable Battery for Lighting, Power Wheel, Fish Finder with and More Built-in 40A BMS(Screw Terminal)

【Excellent Performance】: Sefepoder LiFePO4 batteries are made of high quality cells with high energy density, Long cycle life, Good safety performance, no memory effect, etc. The batteries are only 1/3 of the weight of lead-acid batteries of the same capacity!More safety and environmentally friendly than lead-acid batteries.
【Safe and Reliable】: LiFepo4 batteries will not burn when overcharged, overdischarged, overcurrent or short-circuited, and can withstand high temperatures without decomposing, with built-in BMS protection against overcharge, overdischarge, overcurrent and short-circuit circuits. Can be connected in series or parallel, up to 4 identical batteries in series, 10A fast charge, output discharge up to 20A continuous and 2C pulse.
【Long service life】: Lithium-ion batteries 4000+ cycles no problem, while traditional lead-acid batteries only 200-300 cycles, no memory effect, no matter what state the battery is in, a charge can be used.
【Wide Applications】: Widely used in most fields, such as: Lighting, 12V router, RV/outdoor camping, riding toys, power wheels, scooter, fish finder, amateur radio, solar/wind energy, 12V router, Kayak,off-grid applications, etc.
【What You Get】：1*12V 20Ah LiFePO4 battery, 12 months warranty, If you have any questions, please feel free to contact us(please use LiFePo4 special charger, with automatic SLA charger may not be full)

Powering Your Winter Quest: A Lithium Battery Buying Guide for Ice Fishing

Ice fishing requires reliable power. You need to run your fish finder, charge your phone, and maybe even power a small heater. A good lithium battery is your best friend on the ice. This guide helps you pick the right one.

Key Features to Look For

When shopping for a lithium battery for ice fishing, certain features make a huge difference in the cold.

1. Cold Weather Performance (Crucial!)

Operating Temperature Range: Check the label. Good batteries work well even when it’s freezing. Some standard lithium batteries stop working well below 32°F (0°C). Look for batteries specifically rated for low temperatures.
Capacity Retention: How much power does the battery keep when it gets cold? Better batteries hold their charge longer, even when the temperature drops.

2. Capacity (Amp-Hours – Ah)

Amp-hours (Ah) tell you how long the battery will last. Think of it like the size of your gas tank.

Small Setup (Just a Vexilar/Small Flasher): 10Ah to 12Ah is usually enough for a full day.
Heavy Use (Big Sonar, Charging, Lights): Consider 20Ah or more. More Ah means longer fishing time without needing a recharge.

3. Battery Management System (BMS)

The BMS is the brain of the battery. It protects the battery from damage.

Safety First: A good BMS prevents overcharging, over-discharging, and overheating. This keeps you and your gear safe.
Low-Temperature Cutoff: The best BMS units shut down the battery if the temperature gets dangerously low, protecting the cells inside.

Important Materials and Construction

Lithium Iron Phosphate (LiFePO4) is the material you want for ice fishing. It is much safer and lasts longer than older lithium types.

LiFePO4 vs. Others

Longevity: LiFePO4 batteries last for thousands of charge cycles. This means you buy it once and use it for many years.
Weight: Lithium batteries weigh much less than traditional lead-acid batteries. Lighter gear means easier walking across the ice!

Casing and Durability

Your battery needs to handle being bumped around in a sled or bucket.

Water Resistance: Look for an IP rating (like IP65). This means the battery resists splashes and snow.
Sturdy Housing: A tough plastic or metal case protects the delicate inner cells from impact.

Factors That Improve or Reduce Quality

Quality isn’t just about the brand name. It’s about how well the battery is put together.

Quality Boosters

Grade-A Cells: Top manufacturers use high-quality, tested battery cells. These cells perform consistently.
Verified Capacity: Some cheap batteries lie about their Ah rating. Reputable brands provide accurate specifications.

Quality Reducers (What to Avoid)

No BMS: Batteries without a proper BMS are dangerous and will fail quickly.
Extreme Low Price: If the price seems too good to be true, the internal components are likely low quality. Poor quality batteries lose power fast on the ice.

User Experience and Use Cases

How does the battery feel when you use it?

Ease of Connection

Check the terminals (where you connect the wires).

Terminal Type: Most ice fishing setups use standard screw terminals or quick-disconnect plugs. Make sure they fit your fish finder cables easily.
Indicator Lights: A simple LED indicator showing the remaining charge level is very helpful. You do not want to guess how much power is left.

Use Case Example

Imagine you are out for 8 hours. You run a modern color flasher (which uses about 1.5 Amps) and charge your phone twice. A 12Ah LiFePO4 battery handles this easily. A lead-acid battery of the same size would struggle because you should never drain lead-acid batteries completely.

10 Frequently Asked Questions (FAQ) About Ice Fishing Lithium Batteries

Q: Can I use a regular lithium battery outside in the cold?

A: Not well. Standard lithium batteries lose significant power below freezing. You need a LiFePO4 battery designed to operate in cold conditions.

Q: How long does a lithium battery last compared to a lead-acid battery?

A: Lithium batteries last much longer. They handle many more charge cycles before they wear out, often lasting 5 to 10 times longer than lead-acid.

Q: Do I need a special charger for a lithium battery?

A: Yes. You must use a charger specifically labeled for LiFePO4 chemistry. Using the wrong charger can damage or destroy the battery.

Q: What is the best Ah size for a weekend ice fishing trip?

A: For most anglers running a standard flasher and phone charging, 15Ah to 20Ah gives you a comfortable safety margin for a full weekend.

Q: Are lithium batteries safe to carry on the ice?

A: LiFePO4 batteries are very safe. They have stable chemistry and internal protection (BMS) against common issues like overheating or overcharging.

Q: How do I keep my lithium battery warm?

A: While LiFePO4 is better in the cold than other types, keeping it warm helps performance. Store it inside your shelter or use a small insulated bag when not in use.

Q: Can I connect my 12V accessories directly to the battery terminals?

A: Yes, if your accessories are rated for 12V DC. Just ensure you use proper connectors and do not exceed the battery’s maximum output current (Amps).

Q: Will a lithium battery die suddenly in the cold?

A: If the temperature drops too low, the BMS might shut the battery down to protect it. It won’t die suddenly from normal use, but its output voltage might drop sharply if pushed hard when very cold.

Q: What does the BMS do for me?

A: The BMS protects the battery by stopping charging if it gets too hot, stopping discharge if the voltage gets too low, and balancing the cells for even wear.

Q: How much lighter is a lithium battery than a comparable lead-acid battery?

A: Lithium batteries are often 50% to 70% lighter. A 12Ah lithium battery might weigh only 3 pounds, where a similar lead-acid battery weighs 8 to 10 pounds.