12V 100Ah LiFePO4 Marine Battery with Bluetooth APP
4.2Editor score
Built-in Bluetooth 5.0 monitoring
1280Wh deep cycle capacity
4000+ deep cycles lifespan
In this guide
Choosing the right power source is critical for any angler or boater who relies on electric propulsion. A reliable battery to run a trolling motor ensures you stay on the water longer without unexpected shutdowns or performance drops during peak fishing hours.
We evaluated ten top-rated products based on capacity, cycle life, safety features, and real-world performance data. Our analysis covers both advanced lithium iron phosphate models and traditional lead-acid options to help you find the perfect match for your vessel and budget.
Each selection in this guide highlights specific strengths such as smart monitoring, weight savings, or rugged durability. While prices fluctuate due to market demand and seasonal sales, the core specifications remain stable indicators of long-term value and operational reliability for marine use.
Top 3 Picks for Best Battery to Run a Trolling Motor
12V 320Ah LiFePO4 Lithium Battery Smart APP
4.4Editor score
Real-time app monitoring
Lighter weight larger capacity
Expandable 4P4S system
Interstate Batteries Marine/RV Battery 12V 100Ah
4.1Editor score
925CCA extreme deep-cycle power
3x longer life than flooded
Thick plate construction
Top 10 Best Battery to Run a Trolling Motor in 2026 Compared
This side-by-side comparison highlights key specifications across all ten selected products. From capacity and cycle life to connectivity and build quality, these details help you determine which battery offers the best balance of performance and value for your specific trolling motor setup.
ProductsSpecificationsEditor scorePrice
Best Budget
12V 100Ah LiFePO4 Marine Battery
1280Wh Energy Capacity
4000+ Deep Cycles
Built-in Bluetooth 5.0
100A BMS Protection
4.2Editor score
Editor's Choice
12V 320Ah LiFePO4 Lithium Battery
320Ah High Capacity
Real-Time App Monitoring
4P4S Expandable System
Reinforced Marine Casing
4.4Editor score
Best Premium
12V 320AH LiFePO4 Lithium Battery with Bluetooth App
8000 Deep Cycles Rated
200A BMS Safeguard
Low-Temp Protection Active
4096Wh Total Energy
4.1Editor score
Interstate Batteries Marine/RV Battery
925CCA Cranking Power
100Ah Capacity Rating
AGM Sealed Design
3x Longer Life Span
4.1Editor score
12V100Ah LiFePO4 Lithium Battery (2 Pack)
Group 24 Form Factor
20+ BMS Safeguards
Bluetooth 5.0 Enabled
Expandable 4S4P Config
3.0Editor score
12V 280Ah LiFePO4 Battery with Bluetooth APP
3584Wh Usable Energy
200A Smart BMS
UN38.3 Safety Certified
8000+ Cycle Rating
4.2Editor score
MKR-12 14367-6 Heavy-Duty Trolling Motor Plug
35A Continuous Load Rating
Dual Device Ready Design
Corrosion Resistant Lugs
Positive-Lock Safety Lever
4.8Editor score
NOVINO Trolling Motor Battery Cable Extension Wire Kit
6 Feet Extension Length
8 Gauge Wire Gauge
Includes Connectors and Tape
Red and Black Color
4.6Editor score
NOVINO Trolling Motor Battery Cable Extension Wire Kit 10 Feet
10 Feet Extension Length
8 Gauge Wire Gauge
No Power Loss Design
Complete Kit Hardware
4.6Editor score
Trolling Motor Plug 027-0004-KIT Compatible
80 AMP Capacity Rating
12V to 48V Support
Screw-Lock Quick Connect
Stainless Steel Contacts
3.3Editor score
1. 12V 100Ah LiFePO4 Marine Battery – Best Premium Power Source
12V 100Ah LiFePO4 Marine Battery
1280Wh Energy Output
4000+ Cycle Life
100A BMS System
Bluetooth 5.0 Connectivity
This LiFePO4 marine battery stands out as a top-tier option for serious anglers needing dependable power. With a 4.2 rating and strong specs, it delivers 1280Wh of energy in a compact form that fits easily into standard battery compartments.
Pros
- Real-time app monitoring
- Lighter than AGM batteries
- Low-temperature cut-off
- Supports 4P4S expansion
- Compact energy density
Cons
- Higher initial cost
- Requires compatible charger
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The built-in Bluetooth 5.0 allows you to monitor voltage and temperature directly from your phone, ensuring you never get caught off guard by a low charge. It also features a robust 100A BMS that protects against overcharge and overheating, extending service life.
While the upfront investment is higher than traditional options, the four thousand cycle lifespan means you replace it far less often. The low-temperature protection ensures it works reliably even during cold morning fishing trips where other batteries might fail.
Buy this if you prioritize long-term value and smart connectivity features. It is ideal for setups that need consistent power for trolling motors and fish finders over multiple seasons without frequent maintenance or recharges.
Smart Monitoring for Peace of Mind
The Bluetooth app sends instant alerts for voltage or temperature issues, letting you adjust your usage before power is lost. This proactive feature keeps your electronics running smoothly during long days on the water.
Scalable Power for Growing Needs
Support for 4P4S expansion means you can link multiple units for higher voltage systems. This flexibility allows you to upgrade to a 24V or 48V setup without replacing your entire battery infrastructure later.
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2. 12V 320Ah LiFePO4 Lithium Battery – Editor's Choice Capacity
12V 320Ah LiFePO4 Lithium Battery
320Ah High Capacity
Smart App Monitoring
Reinforced Outdoor Design
4P4S Expansion Ready
This 320Ah lithium battery earns its place as an Editor's Choice due to its exceptional balance of capacity and smart features. With a 4.4 rating, it offers significantly more usable energy than typical 100Ah options while remaining lighter than lead-acid equivalents.
Pros
- Larger capacity than standard
- Lighter weight design
- Stable voltage delivery
- Suitable for solar systems
- High safety ratings
Cons
- Bulkier than 100Ah units
- App connectivity required
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The real-time app monitoring provides complete visibility into your power system, helping you manage usage efficiently. It is designed for outdoor and marine environments with a reinforced casing that resists moisture and environmental wear over time.
While it is larger than standard units, the higher capacity means longer runtimes for your trolling motor and onboard electronics. You get the benefit of stable voltage even under continuous load, which helps maintain consistent motor performance.
Select this model if you need extended time on the water and plan to expand your power system later. It is well-suited for anglers who want a reliable, high-capacity source that integrates well with solar or off-grid setups.
Optimized for Trolling Motors
The battery matches most 30–55 lb trolling motors with stable voltage and long runtime. This ensures smoother operation and reduces the risk of sudden power drops when you need maximum thrust.
Flexible Expansion Options
Support for 4P4S expansion allows you to build larger 24V or 48V systems as needs grow. This flexibility helps you adapt your setup for home backup or off-grid living without buying a completely new battery.
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3. Interstate Batteries Marine/RV Battery – Best Budget AGM
Interstate Batteries Marine/RV Battery
925CCA Power Output
100Ah Capacity
AGM Sealed Construction
Thick Plate Design
For those seeking a traditional lead-acid solution, this Interstate AGM battery offers reliable performance at a lower price point. With a 4.1 rating, it delivers high cranking power and extreme deep-cycle capability suitable for both starting and trolling motor use.
Pros
- Lower upfront cost
- Proven lead technology
- High cranking amps
- No maintenance needed
- Trusted brand history
Cons
- Heavier than lithium options
- Shorter cycle life
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The thick plate construction allows for continuous discharge without rapidly degrading lifespan. It provides twice the life of standard alloyed lead AGM batteries and three times that of conventional flooded types, making it a robust choice for marine environments.
While heavier than lithium alternatives, it avoids the complexity of smart systems and requires no specialized charging equipment. You can rely on it for consistent power during extended trips without worrying about software updates or app connectivity issues.
This battery is a practical choice if you prefer proven technology and need immediate high cranking power. It works well for boats where weight is less critical than budget and straightforward, maintenance-free operation.
Dual Purpose Reliability
As a 2-in-1 battery, it delivers high cranking for starting and deep cycle power for accessories. This dual capability eliminates the need for separate starting and trolling batteries on smaller vessels.
Dependable Power Source
Interstate has a seventy-year history of providing dependable power sources for marine applications. Their commitment to recycling and customer service adds confidence to long-term ownership and usage on the water.
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4. 12V 320AH LiFePO4 Lithium Battery – High Cycle Life
12V 320AH LiFePO4 Lithium Battery with Bluetooth App
8000 Deep Cycles
200A BMS Protection
4096Wh Total Energy
Multi-Mode Charging
This LiFePO4 lithium battery impresses with an extraordinary cycle life and high total energy capacity. With over 8000 deep cycles and a 10-year lifespan, it offers long-term reliability that surpasses traditional lead-acid batteries significantly.
Pros
- Extended 10-year lifespan
- Versatile charging options
- Strong low-temperature protection
- Bluetooth monitoring available
- Supports high-demand inverters
Cons
- Charging time varies by source
- Higher upfront investment
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It supports multiple charging methods, including solar panels and DC generators, making it versatile for off-grid or boat use. The 200A BMS provides robust safety against overcharge and overheating, ensuring consistent performance across various conditions.
The Bluetooth connectivity allows you to check voltage and cycle count from your phone. This transparency helps you understand your usage patterns and plan charging cycles effectively without guessing about remaining power levels.
Buy this if you need a high-capacity battery that can handle both trolling motors and home backup needs. Its ability to power large inverters and support expansion makes it a flexible choice for demanding setups.
Fast and Flexible Charging
You can recharge using a 20A LiFePO4 charger, solar panel, or DC generator with reasonable efficiency. This flexibility ensures you can restore power quickly whether you are docked or off-grid.
Safe for Cold Weather
Built-in low-temperature protection prevents damage during cold mornings or harsh off-grid conditions. This ensures reliable performance even in freezing temperatures where standard batteries might fail unexpectedly.
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5. 12V100Ah LiFePO4 Lithium Battery (2 Pack) – Expandable Kit
12V100Ah LiFePO4 Lithium Battery (2 Pack)
Group 24 Size
20+ BMS Safeguards
Bluetooth 5.0
Expandable 4S4P
This 2-pack offers a convenient way to upgrade to lithium with a Group 24 form factor that fits many existing trays. It features advanced BMS safeguards and Bluetooth 5.0 connectivity for remote monitoring and control during use.
Pros
- Sold as 2-pack bundle
- Lightweight ABS casing
- Advanced low-temperature protection
- M8 terminal bolts included
- Strong customer support
Cons
- Lower rating than others
- Requires careful setup
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The ABS casing resists splashes and corrosion, ensuring durability in marine environments. It supports up to 4S4P configuration, allowing you to expand energy capacity to meet the needs of larger off-grid or boat systems.
While the rating is lower than some competitors, the inclusion of M8 bolts and professional customer support adds value. The low-temperature protection prevents damage in extreme conditions, making it suitable for varied climates and seasons.
Choose this if you want a ready-to-install kit with room for future expansion. It is best for users who prefer a bundle and do not mind balancing trade-offs between cost and performance metrics.
Convenient Group 24 Fit
The Group 24 size fits standard battery trays without modification, simplifying installation. This makes it easier to switch from lead-acid to lithium without needing new enclosures or mounting hardware.
Advanced Safety Features
Over 20 BMS safeguards protect against faults including overcharge and overheating. This comprehensive safety net ensures stable operation and peace of mind during continuous use on the water.
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6. 12V 280Ah LiFePO4 Battery – Certified Safe Energy
12V 280Ah LiFePO4 Battery with Bluetooth APP
3584Wh Usable Energy
200A Smart BMS
UN38.3 Certified
8000+ Cycle Life
This battery combines high capacity with rigorous safety certifications to deliver reliable performance. With UN38.3 and FCC standards met, it is a safe choice for marine and home backup applications requiring strict safety compliance.
Pros
- FCC and UN38.3 certified
- Expandable up to 57kWh
- Premium EV-grade cells
- High capacity per weight
- Detailed fault alerts
Cons
- Requires 200A charger
- Higher price point
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The 200A Smart BMS provides precise protection against faults while maximizing cycle life. Bluetooth integration gives you diagnostic information and fault alerts in real time, helping you detect issues early before they become serious.
With over 3584Wh of energy, it supports multiple appliances like refrigerators or Starlink alongside your trolling motor. Its ability to expand up to 57.34kWh makes it future-proof for larger energy storage needs.
This is an excellent choice if you need certified safety and high energy density. It suits users who want to integrate their boat power with home backup systems without compromising on performance standards.
Certified Safety Standards
Testing to meet FCC and UN38.3 international safety standards ensures dependable performance. This certification is essential for marine applications where electrical safety and reliability are non-negotiable.
Expandable Storage Capacity
The 4P4S configuration allows you to build larger energy storage systems as demand grows. This flexibility makes the battery ideal for evolving needs like full off-grid solar or larger home backup setups.
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7. MKR-12 14367-6 Heavy-Duty Plug – Reliable Connector
MKR-12 14367-6 Heavy-Duty Trolling Motor Plug
35A Continuous Load
Dual Device Ready
Copper Lugs
Weatherproof Design
This heavy-duty plug ensures secure and reliable connections for your trolling motor system. With a 4.8 rating, it outlasts generic connectors and is engineered for harsh marine conditions where durability is paramount.
Pros
- Positive-lock safety lever
- Saltwater-resistant hardware
- Fire-resistant PVC housing
- Dust cap included
- Easy quick disconnect
Cons
- Not a battery itself
- Requires existing wiring
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The positive-lock lever design keeps terminals secure even in rough waters or high winds. It features solid copper lugs with corrosion-resistant tin plating that handle 35A continuous load without overheating or degradation.
Included dust caps protect the connector from moisture and debris when not in use. The fire-resistant PVC housing withstands extreme temperatures, making it suitable for diverse climates and storage conditions.
Install this if you need a safe and durable connection for your motor or battery. It is essential for anglers who want to avoid dangerous clips and ensure consistent power transfer on every trip.
Safety and Quick Disconnect
The quick disconnect design eliminates dangerous battery clips, allowing safe and fast connections. A positive-lock lever ensures terminals stay secure even in rough waters or windy conditions.
Heavy-Duty Marine Build
Solid copper lugs with corrosion-resistant plating handle up to 35A continuous load. Outlasts generic connectors in saltwater tests, ensuring reliable performance over many seasons.
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8. NOVINO Trolling Motor Battery Cable Extension Wire Kit – 6 Feet
NOVINO Trolling Motor Battery Cable Extension Wire Kit
6 Feet Length
8 Gauge Wire
Complete Connect Kit
No Power Loss
This extension kit is designed to maintain power efficiency while reaching your motor or battery box. With a 4.6 rating, it uses 8 gauge wire to prevent voltage drop and ensure consistent performance during use.
Pros
- No power loss extension
- Includes electrical tape
- Red and black wires
- Easy installation hardware
- Fits standard boxes
Cons
- Limited to 6 feet
- May need custom fit
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The kit includes necessary hardware and safety electrical tape for a professional install. It allows you to extend the cable without impacting the performance of your trolling motor or onboard electronics.
Perfect for boats where the battery box is far from the motor mount. The red and black wires are clearly marked to avoid polarity issues during installation and maintenance.
Use this if you need a simple way to reposition your battery or motor without compromising power. It provides a reliable connection that protects your motor from voltage sag during high-draw situations.
Optimal Wire Gauge
The 8 gauge cable ensures no power loss when extending the battery cable to the trolling motor. This maintains consistent voltage for smooth motor operation even at longer distances.
Complete Installation Kit
Includes connect hardware and safe electrical tape for a clean and secure install. You do not need additional tools or materials to complete the extension setup on your boat.
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9. NOVINO Trolling Motor Battery Cable Extension Wire Kit 10 Feet – Extra Reach
NOVINO Trolling Motor Battery Cable Extension Wire Kit 10 Feet
10 Feet Length
8 Gauge Wire
No Power Loss
Complete Kit Hardware
For boats that require longer cable runs, this 10-foot extension offers reliable reach without sacrificing power quality. It mirrors the 8 gauge design of the shorter version but adds extra length for larger vessels.
Pros
- Extended 10-foot reach
- No power loss
- Includes connect hardware
- Compatible with motor kits
- Clear wire color coding
Cons
- May exceed some needs
- Storage bulk
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The kit ensures no power loss even at 10 feet, maintaining motor performance. It comes with connect hardware and safety tape, making it a turnkey solution for extending your motor wiring.
Ideal for installations where the battery compartment is distant from the motor. The red and black wires are clearly marked to simplify polarity checks and reduce installation errors.
Buy this if you need significant reach to position your battery safely away from the motor mount. It supports consistent performance and protects your electronics from voltage drop during extended runs.
Extended Reach
The 10-foot length allows for greater flexibility in positioning battery and motor on larger boats. Ideal for hooking up motors when standard cables are not enough.
Consistent Performance
8 gauge cable ensures no power loss when extending battery cable. Maintains full performance for trolling motors even with longer wire runs.
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10. Trolling Motor Plug 027-0004-KIT Compatible – High Capacity Connector
Trolling Motor Plug 027-0004-KIT Compatible
80 AMP Capacity
12V to 48V
Screw-Lock Design
Stainless Steel
This high-capacity plug supports up to 80A continuous use, making it suitable for large 48V trolling motor systems. With a compact design, it integrates well with custom wiring or full trolling motor kit packages.
Pros
- Higher amperage capacity
- Compatible with Battery Tender
- Screw-lock for security
- Fits multiple voltages
- Compact design
Cons
- Higher cost than basic plugs
- May require adapters
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The screw-lock design ensures a true quick connect that resists vibration during rough waters. It is compatible with Battery Tender connectors and other marine DC connections for easy maintenance.
While rated for higher systems, it works reliably with 12V setups as well. The stainless steel and copper contacts provide strong conductivity and resistance to corrosion in marine environments.
Use this if you need a plug that supports high-amperage loads and secure connections. It is ideal for upgrading older wiring kits or ensuring safe current transfer on larger electric boats.
High Capacity Performance
Engineered for 48V trolling motor systems and large 100 lb thrust loads. Provides 80A continuous service to power high-demand accessories reliably.
Secure and Quick
Screw-lock design functions as a true quick connect for clean installations. Works with various plugs and receptacles to ensure safe current transfer without vibration issues.
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Buying Guide – How to Choose the Best Battery to Run a Trolling Motor
Selecting the right battery involves understanding capacity, chemistry, safety features, and compatibility. This guide breaks down the essential factors to help you choose a product that balances performance, longevity, and cost for your trolling motor needs.
Battery Chemistry: Lithium vs. Lead-Acid
Lithium iron phosphate (LiFePO4) batteries offer higher energy density, lighter weight, and longer cycle life than lead-acid options. They maintain consistent voltage under load and do not require periodic maintenance like water checks. However, they typically have a higher upfront cost and require compatible chargers.
Lead-acid AGM batteries are more affordable and familiar to most users. They work with standard charging systems but are heavier and have fewer cycles. If you want maximum runtime and minimal weight, lithium is ideal; if budget and simplicity matter more, AGM may be better.
Capacity and Runtime Requirements
Capacity measured in amp-hours (Ah) determines how long your trolling motor can run on a single charge. Calculate your expected runtime by dividing capacity by your motor's amp draw. For full-day fishing, a 100Ah+ battery is often needed unless you manage usage carefully.
Consider that lithium batteries offer nearly 100% usable capacity while lead-acid typically offers 50% safe depth of discharge. This means a 100Ah lithium unit effectively provides twice the runtime of a similar lead-acid battery without draining it fully.
Cycle Life and Longevity
Cycle life indicates how many full charge and discharge cycles a battery can endure before significant degradation. LiFePO4 models typically offer 3000 to 8000 cycles, whereas AGM batteries provide 300 to 500 cycles. More cycles mean fewer replacements and lower long-term costs.
If you fish frequently or use your battery year-round, higher cycle life is worth the initial investment. This metric is crucial for comparing value over time rather than just upfront purchase price.
Safety Features and Protection
Look for built-in Battery Management Systems (BMS) that protect against overcharge, short circuits, and overheating. Low-temperature protection prevents damage when charging in freezing conditions, which is common for early-season fishing.
Safety standards like UN38.3 or FCC certification indicate the battery meets rigorous testing. These features ensure reliability and protect both you and your expensive marine electronics from electrical hazards or failures.
Weight and Size Constraints
Weight impacts boat balance and fuel efficiency. Lithium batteries weigh roughly one-third of lead-acid equivalents, freeing up space for gear or improving handling. Ensure the physical dimensions fit your existing battery box or mounting space.
If you have limited space or need to reduce overall weight, lithium is clearly superior. Check product specs for dimensions to avoid fit issues during installation on smaller vessels or kayaks.
Monitoring and Connectivity
Smart batteries with Bluetooth app monitoring let you check voltage, temperature, and state of charge from your phone. This real-time visibility helps you plan trips and avoid unexpected power loss during use.
While not strictly required, monitoring adds peace of mind and convenience. If you value tracking power usage or want alerts for potential issues, choose a model with integrated smart features.
Expandability for Future Needs
Some lithium batteries support series and parallel connections to increase voltage or capacity. This expandability allows you to upgrade to 24V or 48V systems later without replacing your entire power setup.
If you plan to grow your electronics or motor thrust over time, confirm the battery supports 4P4S or similar expansion. This flexibility protects your investment as your boating needs evolve.
Charging Compatibility and Speed
Ensure your charger matches the battery chemistry. Lithium requires a dedicated LiFePO4 charger to avoid undercharging or damage. Fast charging capability is a bonus for quick turnaround between trips.
Check if the product supports solar or DC generator input. Versatile charging options are valuable for off-grid anglers who want to recharge using renewable sources or vehicle alternators on the go.
How to Use and Care for Your Battery to Run a Trolling Motor
Start by securely mounting the battery in a vented, dry compartment to protect it from shocks and moisture. Ensure all connections are clean, tight, and use the recommended terminal hardware to prevent resistance and heat buildup.
Charge the battery fully before first use and avoid letting it sit discharged for extended periods. Use a charger compatible with your battery type to maintain health and prevent cell imbalance that could shorten lifespan.
Regularly check for any signs of corrosion or loose wiring. Keep the terminals clean and apply a thin coat of dielectric grease to guard against moisture. Monitor app data to track usage patterns and recharge before completely depleting the battery.
Frequently Asked Questions
How long does a 100Ah battery run a trolling motor?
Runtime depends on your motor's thrust and speed setting. At low speeds, a 100Ah lithium battery can run a 30lb thrust motor for 10 hours or more. At higher speeds, expect around 4 to 6 hours. Lead-acid batteries offer roughly half the usable capacity for similar runtime.
Can I use a regular car charger for a lithium marine battery?
No, you should not use a standard lead-acid charger for lithium batteries as it may cause imbalance or damage. Always use a dedicated LiFePO4 charger with the correct voltage and charging profile. This ensures safe and efficient recharging for your specific battery type.
What is the lifespan of a LiFePO4 trolling motor battery?
Most LiFePO4 batteries offer 3000 to 8000 deep cycles, translating to roughly 8 to 10 years of regular use. This lifespan is significantly longer than lead-acid options, reducing replacement frequency and total cost of ownership over time.
Do I need a special charger for AGM batteries?
Yes, AGM batteries require a charger with AGM mode to ensure proper charging without gassing or overheating. Using a standard charger can reduce lifespan and void warranties. Verify your charger supports AGM chemistry for safe operation.
How do I store my battery during winter?
Store the battery in a cool, dry place where temperatures stay above freezing. Charge it to about 50–80% capacity before storage and check voltage periodically. Avoid leaving it fully discharged to prevent cell degradation or freezing damage.
Can I connect multiple batteries for more power?
Yes, many lithium batteries support parallel or series connections to increase capacity or voltage. Ensure all batteries match in model and age for safe balancing. Follow the manufacturer's instructions for expansion to avoid wiring issues or safety risks.
What safety certifications should I look for?
Look for UN38.3, FCC, or marine safety certifications to ensure the battery meets rigorous testing standards. These marks indicate the battery is built to handle extreme conditions safely. Avoid uncertified products to protect your boat and electronics.
Is lithium worth the extra cost?
Lithium is often worth it for frequent users due to longer lifespan, lighter weight, and more usable capacity. While upfront costs are higher, the reduced replacement frequency and improved performance balance the investment. For occasional use, AGM may suffice.
Final Thoughts on Choosing the Best Battery to Run a Trolling Motor
The best battery for your needs depends on balancing performance, cost, and features. Our top picks include the premium Bluetooth-enabled models and the budget-friendly AGM options for flexibility. Each product offers distinct advantages to match various boating styles and budgets.
Prioritize capacity, cycle life, and safety features when making your choice. Smart monitoring and expandability add value for long-term use, while simpler options work well for occasional anglers. Consider your specific trolling motor specs and available installation space.
Remember that prices change frequently and sales may offer great value on higher-tier models. Always verify the latest specs and compatibility before buying. With the right battery, you will enjoy more time on the water with reliable power for every trip.