The best way to upgrade your trolling motors today is by switching to Black Oak's new 36V 70Ah lithium battery – the hands-down most reliable workhorse on the market.

At Black Oak, we were tired of underperforming SLA and AGM batteries, and we didn't trust the lithium options off Amazon any farther than we could throw them. That's why we decided to engineer our own.

Say hello to enhanced power and durability. Our state-of-the-art lithium batteries are designed for fishermen just like you, offering two times the power, half the weight, and ten times the lifespan of traditional AGM and lead-acid batteries. Black Oak Lithium ensures optimal performance and are built to last.

Features

Over 4000 Cycles at 80% depth of discharge
Seamless Bluetooth connectivity to Android & iOS app
Series and/or Parallel operation
Automatic cell balancing system
IP67 Water and Dust resistant Group 31 case
Temperature monitoring
Exceptional voltage stability
Robust mechanical design
Maintenance free, Plug & Play replacement
No hydrogen generation or gas
Less than half the weight of similarly sized SLA & AGM batteries
Top of class in safety and reliability
Stock available for quick delivery in US or worldwide
Lifetime support, see warranty tab for warranty details

In the Box

Black Oak 36V 70Ah Marine Lithium Battery
Black Oak On-Board 36V 10Ah Marine Lithium Battery Charger
Solid Brass Hardware
Instruction Manuel

Bluetooth Enabled

Seamlessly connect your phone to any Black Oak Lithium Battery to monitor all battery vitals in our app.

More Usable Capacity

Black Oak Lithium batteries allow you to use 100% of their capacity, regardless of the discharge rate.

Built-In Battery Management System (BMS)

Our intelligent BMS not only maintains peak performance but also acts as a guardian, preventing overheating, overcharging, and extending the cell cycle life.

Made For 36V Trolling Motors

Upgrade to the power and longer run time of a Black Oak Lithium 36V battery for your trolling motor.

Warranty

Black Oak Lithium Limited Warranty

Black Oak Lithium sets the industry standard with an unmatched 11-year limited warranty against manufacturing defects across all lithium batteries. We offer comprehensive Free replacements for the initial 5 years, after this period, replacements are prorated at a 35% discount off the retail price. Additionally, both Electric Fishing Reel Batteries and Marine Lithium Battery Chargers come with a 2-year complimentary replacement warranty.

What does this warranty cover?

At Black Oak, we take pride in our products. We offer a Limited Warranty ensuring that every lithium battery purchased from blackoakled.com, or our authorized dealers and distributors, is free from defects at the time of purchase. This warranty specifically covers any defects in materials and workmanship under standard use throughout the Warranty Period. Should any issues arise due to improper workmanship during normal use and maintenance, Black Oak commits to repairing or replacing the product or its parts at no cost.

How does the warranty work?

If your battery is broken, we'll fix it or give you a new one. Fixable batteries are repaired for free. If the problem is determined to be a manufacturing defect and within 5 years, we replace it for free. After 5 years, we'll fix your battery for free if we can, if not, you can buy a new one for 35% off. It may take up to 1 week to repair your battery. Need a new battery right away? You'll need to pay first, but we'll refund you once we get the old one back and confirm it's defective.

Duration of warranty

We offer an industry leading 11-year warranty on lithium batteries from the date of purchase. Any replacement batteries issued carry the remaining warranty from the date of the original purchase.

What exclusions apply to this limited warranty?

This warranty exclusively covers manufacturing defects. Actions such as jump-starting, short-circuiting, intentional negligence, tampering with manufactures seal, using unauthorized chargers, shipping related damages, incorrect battery installation, breakage due to collisions, improper storage, water damage, temperature damage from extreme heat or cold, or abuse will invalidate the warranty without exceptions. If the battery is determined to be misused, the customer will be responsible for repair charges, which include parts and shipping. Black Oak Lithium retains the discretion to decline any warranty claims.

If you feel you have a warranty issue please start here

If you believe you have a warranty issue that is due to a defect in either material or workmanship please follow these steps.

Read the warranty details section above to determine if your product is in need of a warranty repair or not.

How did you purchase the Product?

I purchased directly from blackoakled.com - please review the following information below.

I purchased from an authorized reseller of Black Oak LED - please review the following information and contact the reseller directly to return your product.

Request a Return Merchandise Authorization (RMA) number for a warranty claim by emailing us at support@blackoakled.com

PLEASE NOTE an RMA number is required for all returned packages. Unfortunately, failure to follow this step will result in the package being returned to sender.

We will quickly follow up with a reply email containing directions to process your warranty claim.

Specs

Black Oak Lithium 36V 60Ah Trolling Motor LiFePO4 Marine Battery Technical Specifications

Nominal Voltage: Operating at 39.6V, this Black Oak Lithium battery delivers a consistent and reliable power supply for various applications.

Nominal Capacity @ 1C: With a nominal capacity of 60Ah at 1C, this battery ensures enduring performance in a variety of scenarios.

Charge Voltage: Maintain optimal charging with a recommended voltage of 43.8V, ensuring efficient and safe battery replenishment.

Charge Current (Recommended): Efficiently charge your battery with a recommended current of less than 12A, promoting longevity and reliability.

Discharge Voltage Minimum: Experience prolonged usability with a minimum discharge voltage of 33V, ensuring continued power supply.

Discharge Current Max (Constant): Benefit from a maximum constant discharge current of 60A, providing substantial power when needed.

Pulse Current: Handle peak power demands with a pulse current capability of 234A, ensuring reliable performance in high-demand situations.

Weight: Weighing just 31.9lb (14.46kg), this Black Oak Lithium battery is a lightweight powerhouse, suitable for diverse applications.

BCI Group Number: Designed to fit Group 31 specifications, this battery aligns seamlessly with industry standards, ensuring compatibility with a range of systems.

Terminals (TPI): Featuring M8 x 1.25 terminals, the Black Oak Lithium battery ensures secure connections and ease of installation.

Dimensions L x W x H (w/Terminals): Measuring at 13.46" x 6.81" x 8.3", this battery offers a compact yet powerful solution, facilitating versatile installation.

Operating Temperature: Adapt to challenging conditions with an operating temperature range from -10°C to 45°C during charging and -20°C to 60°C during discharge.

Storage Temperature: Store your battery with confidence, knowing it can withstand temperatures from -40°C to 50°C, ensuring optimal performance and longevity.

Optimal Humidity: Operate in diverse environments with an optimal humidity range of 5% to 95%, ensuring reliable performance in varying conditions.

Water/Dust Resistance Rating (IP): Equipped with an IP56 rating, this Black Oak Lithium battery is protected against harmful dust deposits (5 Rating) and strong jets of water (6 Rating).

Certifications: Certified for safety and performance with UL1642 and FFC Class B certifications, ensuring compliance with industry standards.

Shipping Classification: Conforming to UN 3480, Class 9 standards, this Black Oak Lithium battery is suitable for safe transportation in various contexts.

Discover Black Oak Lithium 39.6V 60Ah Battery – a powerhouse engineered for reliability, performance, and adaptability in any application.

Product Q+A

Is it really twice as powerful?

You betcha! Here at Black Oak Lithium, we engineer our batteries using lithium technology, and it's a game-changer. Picture this – 60% less weight, a charging speed up to 5 times faster, and a significantly longer lifespan (we're talking 5-10 years longer on average). But here's the real kicker – the flat voltage curve. Unlike those lead acid batteries that start sagging as you use them, our Black Oak Lithium battery maintains a steady voltage for 99% of its charge. That means you're getting all that power down to the last drop and doubling the usable power compared to traditional batteries.

Are these lithium batteries safe?

Absolutely, positively safe and reliable! Our batteries are non-toxic, non-corrosive, don't off-gas, and require zero watering or maintenance. Plus, they play nice in any orientation. And here's the kicker – it won't explode or catch fire. Each Lithium battery is equipped with a battery management system (BMS) microchip, protecting it from overheating, overcharging, and short-circuiting. We even put it in a rugged, fireproof, and IP67 waterproof case for good measure.

How do I charge this battery up?

Lithium Battery Chargers engineered specifically for Black Oak Lithium Batteries are included in our Trolling Motor Battery Kits.

Got any deals for military or first responders?

Absolutely, we do! At Black Oak Lithium, we tip our hats to the brave men and women who safeguard our nation. Military personnel and first responders, present and past, enjoy a sweet 15% discount. And guess what? If there's already a sale happening, we'll toss in an extra percentage just for you. Reach out to us at 800-348-1287 or fill out the form below to snag these special prices.

What exactly does your warranty cover?

We are human, and thus make mistakes. If you believe your light was one of these rare occurrences due to workmanship or material failure, send it back and we will verify. Once confirmed, Black Oak LED will repair, or otherwise replace, your light free of charge.

How can I hop on board as a dealer?

For wholesale and bulk orders, give us a holler at 1-800-348-1287 or drop us an email at support@blackoakled.com

Do we have an app?

Yes, use the links below to download the latest version of our app and seamlessly monitor all the vitals of your Black Oak Lithium battery via bluetooth connection.

IOS App Download

Android App Download

36 Volt Lithium Batteries

Black Oak Lithium 36V 70Ah Deep Cycle Trolling Motor Battery

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Black Oak On-Board 36V 10A Marine Lithium Battery Charger

Black Oak Lithium 36V 120Ah Deep Cycle Trolling Motor Battery