Eternal Lithium
Eternal Lithium 36V Overkill Package – 3 × 36V 50Ah Batteries + Charger
$3,199.00
Eternal Lithium 36V Overkill Package – 3 × 36V 50Ah Batteries + Charger
$3,199.00
Get it between October 26 and October 28.
Low in stock
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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 Overkill Package – 3 × 36V 50Ah Batteries + Charger
Take your power setup to the next level with the Eternal Lithium 36V Overkill Package. Featuring three 36V 50Ah lithium batteries and a waterproof 36V 10A charger, this high-capacity package delivers a combined 150Ah capacity at 36V when the batteries are connected in parallel.
Designed for users who need substantial power capacity, this package offers an easy-to-install setup. Each 36V 50Ah battery fits in a Group 31 battery tray, helping simplify installation and maintain a streamlined battery arrangement.
Important: Connect all three batteries in parallel, not in series, to maintain the intended system voltage and achieve the combined 150Ah capacity.
Key Features
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High-Capacity Power Package: Three 36V 50Ah batteries provide a combined 150Ah capacity when connected in parallel.
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Waterproof Charger Included: Comes with a 36V 10A waterproof charger.
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Group 31 Fitment: Batteries are designed to fit Group 31 battery trays for convenient installation.
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LiFePO4 Battery Technology: Uses UL-certified 32700 cylindrical lithium iron phosphate cells.
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Integrated Battery Protection: Battery management system (BMS) protection against overvoltage, undervoltage, overcurrent, temperature-related issues, and short circuits.
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Durable Housing: Each battery features an ABS shell.
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IP67 Rating: Listed water and dust resistance for the battery.
Package Includes
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3 × Eternal Lithium 36V 50Ah batteries
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1 × 36V 10A waterproof charger
36V 50Ah Battery Specifications
| Specification | Details |
|---|---|
| Battery Rated Voltage | 38.4V |
| Rated Capacity | 50Ah per battery |
| Combined Capacity | 150Ah at the intended 36V system configuration |
| Maximum Charge Voltage | 43.8V |
| Cut-Off Voltage | 30V (general specification; see discharge details below) |
| Recommended Charge Current | Below 40A |
| Maximum Charge Current | 80A |
| Continuous Discharge Current | 80A |
| Maximum Peak Discharge Current | 160A for 5 seconds |
| Dimensions / Tray Fitment | Group 31 |
| Weight | 36 lbs. per battery |
| Cell Type | UL-certified 32700 cylindrical LiFePO4 cells |
| Cell Configuration | 12S14P |
| Housing | ABS shell |
| Water and Dust Resistance | IP67 |
Battery Management System (BMS)
Each battery includes protection functions designed to help safeguard the battery during operation:
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Overvoltage protection
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Undervoltage protection
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Overcurrent protection
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Temperature protection
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Short-circuit protection
Standard Charging Specifications
| Specification | Details |
|---|---|
| Charge Voltage | 43.8V |
| Charge Mode | CC-CV |
| Listed Charge Current Range | 5A to 80A |
| Recommended Charge Current | Below 40A |
| Maximum Charge Current | 80A |
| 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 | 80A |
| Maximum Peak Current | 160A for 5 seconds |
| Discharge Cut-Off Voltage | 40V |
| 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% |
Installation Reminder
Connect the three batteries in parallel, never in series, to achieve the intended high-capacity 36V setup. Confirm that the batteries, charger, wiring, and connected equipment are compatible with the manufacturer's requirements before installation.
Why Choose the Eternal Lithium 36V Overkill Package?
For users who need more battery capacity in a single package, the Eternal Lithium 36V Overkill Package combines three Group 31-compatible LiFePO4 batteries with a waterproof charger. Its parallel configuration provides a listed combined capacity of 150Ah while keeping installation straightforward.
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.
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