Eternal Lithium
Eternal Lithium 36V 100Ah King Kong Deep Cycle Battery
$1,799.00
Eternal Lithium 36V 100Ah King Kong Deep Cycle Battery
$1,799.00
Get it between October 26 and October 28.
Low in stock
✓ Used by Hundreds of Customers
✓ Trusted by Sailors Nationwide
✓ Expert Customer Service
✓ Bulk Pricing Available
At MarineXGear, we are proud to have the best refund and return policies in the industry. If you’re not satisfied with your purchase for any reason, you may return it to us within 30 days for a refund.
If you have a problem with our order (there are missing components, damages, or the product is not functioning), please reach out to us as quickly as possible. Some of the problems can be resolved by going through the product manual or the product FAQs.
Refer to our Refunds & Return Policy for more details.
Order Processing
Once we receive your order, we will send you a confirmation email. Then we will process the order by confirming that the product is in stock and ready for shipment. If any of the items in your order are back-ordered, we will reach to you via email or phone and you may choose to either wait or receive a 100% refund.
Please allow 1-3 days for processing your order.
Shipping
We ship to the lower 48 continental United States only at this time.
Shipping times and shipping method will depend on the specific product and brand you purchase. If you have any shipping question, feel free to ask on the chat or email us at info@marinexgear.com.
We will send tracking information by email the same day the shipping tracking number is created/available.
Before you sign the shipping bill, please THOROUGHLY INSPECT YOUR ITEM. Signing for the receipt of a damaged product removes the liability of the shipping company and MarineXGear. Once you accept your shipment as non-damage, your item is your property.
Eternal Lithium 36V 100Ah King Kong Deep Cycle Battery
Meet the Eternal Lithium 36V 100Ah King Kong Deep Cycle Battery, a custom-built marine battery designed for anglers and boat owners who need substantial power for extended time on the water.
Whether you're planning long practice days trolling on high settings, fishing in heavy currents, or powering equipment off-grid, this battery is designed for demanding marine applications. For a more complete installation solution, the optional BTC package is available with a charger, custom battery tray, and heavy-duty ratchet strap.
Includes a 12-year warranty, subject to the manufacturer's warranty terms and conditions.
Key Features
-
High-Capacity Marine Battery: Designed for demanding fishing and marine power needs.
-
Custom-Built Configuration: Intended for users seeking more power than a 36V 72Ah setup.
-
LiFePO4 Battery Technology: Uses UL-certified 32700 cylindrical lithium iron phosphate cells.
-
Integrated Battery Management System: Includes protection against overvoltage, undervoltage, overcurrent, temperature-related issues, and short circuits.
-
IP67 Protection Rating: Listed protection against dust and water ingress under specified test conditions.
-
Durable ABS Housing: Built with an ABS battery shell.
-
Optional BTC Package: Available with a charger, custom battery tray, and ratchet strap.
-
12-Year Warranty: Refer to the manufacturer's warranty terms for coverage details.
Package Options
Battery Only
-
1 × Eternal Lithium 36V King Kong Deep Cycle Battery
Optional BTC Package
-
1 × Battery
-
1 × Charger
-
1 × Custom battery tray
-
1 × Heavy-duty ratchet strap
Confirm the selected package contents and charger specifications before ordering.
Battery Specifications
| Specification | Details |
|---|---|
| Product Name | Eternal Lithium 36V 100Ah King Kong Deep Cycle Battery |
| Rated Voltage | 38.4V |
| Rated Capacity | 80Ah listed; verify |
| Maximum Charge Voltage | 43.8V |
| Cut-Off Voltage | 30V |
| General Charge Current | 40A listed |
| Continuous Discharge Current | 80A listed in general specifications |
| Maximum Discharge Current | 160A listed in general specifications |
| Dimensions | 525 × 270 × 220 mm |
| Dimensions (inches) | 20.7 × 10.7 × 8.7 in |
| Weight | 28.4 kg (62.6 lb) |
| Cell Type | UL-certified 32700 cylindrical LiFePO4 cells |
| Cell Configuration | 12S14P |
| Housing | ABS shell |
| Water and Dust Resistance | IP67 |
| Warranty | 12 years, subject to manufacturer terms |
Battery Management System (BMS)
The battery's BMS includes the following protection functions:
-
Overvoltage protection
-
Undervoltage protection
-
Overcurrent protection
-
Temperature protection
-
Short-circuit protection
Standard Charging Specifications
| Specification | Details |
|---|---|
| Charge Voltage | 43.8V |
| Charge Mode | CC-CV |
| Listed Charge Current Range | 5A–80A |
| Recommended Charge Current | Below 50A |
| Maximum Charge Current | 100A |
| High-Temperature Charge Protection | 60°C |
| High-Temperature Recovery | 50°C |
| Low-Temperature Charge Protection | 0°C |
| Low-Temperature Recovery | 5°C |
Standard Discharge Specifications
| Specification | Details |
|---|---|
| Continuous Discharge Current | 100A |
| Maximum Peak Discharge Current | 200A for 5 seconds |
| Discharge Cut-Off Voltage | 30V |
| High-Temperature Protection | 65°C |
| High-Temperature Recovery | 55°C |
| Low-Temperature Protection | -20°C |
| Low-Temperature Recovery | -10°C |
Operating Environment
| Condition | Temperature Range |
|---|---|
| Charging | 0°C to 45°C (32°F to 113°F) |
| Discharging | -20°C to 65°C (-4°F to 149°F) |
| Storage | 5°C to 45°C (41°F to 113°F) |
| Listed Relative Humidity | 60% ± 25% |
Power for Extended Days on the Water
The Eternal Lithium King Kong Deep Cycle Battery is designed for marine users who need a dedicated battery solution for extended fishing sessions and demanding power requirements. Choose the battery-only option or consider the optional BTC package for additional installation accessories.
Before purchasing, verify the battery's actual capacity, electrical compatibility, charger requirements, and mounting dimensions with the manufacturer.
Why Choose MarineXGear
At MarineXGear, we believe true peace of mind on the water starts with having the right equipment. Our mission is simple: to be the trusted destination for premium marine gear and dependable on-water solutions. Every product we carry — whether navigation systems, safety equipment, marine electronics, or boat accessories — is carefully chosen to help you perform at your best, stay safe, and get the most out of every voyage.
A+ Customer-First Approach
We're more than an online store — we're your partner on the water. Unlike large, impersonal retailers, our dedicated team delivers personalized guidance at every step. Whether you're outfitting a vessel for the first time, upgrading your gear, or need expert advice on a specific product, our specialists are always just a call or email away.
Passion for Wellness & Resilience
Our brand is built on a genuine love for the sea. We live and breathe marine equipment — and when you reach out to MarineXGear, you'll connect with experts who understand both the technical specs of our products and the on-water lifestyle they support.
Trusted Experts, Curated Brands
We partner directly with the most respected names in the marine industry. Our curated selection ensures every product meets our high standards for quality, durability, and performance on the water. With MarineXGear, you shop with confidence, knowing you're investing in proven gear backed by full manufacturer warranties.
More Reasons to Choose MarineXGear
- Price Match Guarantee – We’ll match any competitor to ensure you always receive the best value.
- Free Shipping – Enjoy free delivery on most orders across the lower 48 U.S. states.
- 100% Secure Ordering – Our platform uses SSL encryption to protect your information.
- Exclusive Packages & Volume Discounts – Customized solutions available for clinics, wellness centers, and large orders.
- Authorized Dealer – Every order is protected with full manufacturer support and warranties.
At MarineXGear, we're committed to keeping you safe, equipped, and confident on the water. With our expertise, personalized service, and carefully curated selection, you can invest in your vessel and your adventures with complete peace of mind.
- Choosing a selection results in a full page refresh.
- Opens in a new window.