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Wattcycle 12V 100Ah Pro Group 31 LiFePO4 Battery with 110A BMS Upgrade

Sale price $17999 Regular price $30999
Stronger Power. Smarter Protection. Built for Bigger Adventures.
  • Group 31 (110A BMS): 13.0 × 6.9 × 8.7 in | 26.0 lbs
  • Upgraded 110A BMS Protection: Max 110A continuous discharge | full protection from overcharge, over-discharge, overcurrent, short circuit & overheating.
  • Lead-Acid Replacement: Same size, 2/3 lighter, 2× usable energy & 10× lifespan compared to old Group 31 batteries.
  • High Energy Output: 1280Wh capacity | 1408W max output for longer runtime & higher power appliances.
  • Premium EV Grade A+ Cells: 5000–15000 cycles DOD | 10+ years lifespan for superior reliability.
  • Best Value: Only $0.16 per Wh on average | maintenance-free | saves ~$65.4/year (1 cycle/day).
  • Low-Temperature Cut-Off: Auto discharging cut-off < -4℉ | charging cut-off < 32°F | resumes > 41°F.
  • Versatile Applications: Ideal fit for large RVs, vans, campers, trolling motors, bass boats, marine, home storage, mowers, off-grid systems & golf carts.
  • Reinforced Design: IP65 waterproof rating | built-in metal frame for internal stability & vibration resistance.
  • DIY Power Expansion: Supports up to 4S4P configuration — build a 20.48 kWh power station.
  • Fast & Flexible Charging: Up to 1C rate | compatible with LFP charger, generator, and solar panel.
  • Reliable Service: Fast shipping & delivery | 5+2 years warranty | professional tech support | safe packaging.
  • Certified Quality: IEC / ROHS / CE / FCC / UN38.3 / Class 9.
Version
Quantity

User Manual

Shipping Service

Destinations:

  • We only ship orders toContinental 
  • Currently we DO NOT ship to Alaska, Hawaii, and Puerto Rico.

Shipping Fee:

  • FREE shipping on all orders
  • Shipping method: UPS Ground

Shipping time:

The time frame of an order delivery is divided into two parts:

  • Processing time: 1-2 business days
  • Shipping time: 2-5 business days
  • The shipping will delay for some objective or uncontrolled reasons. We will notice our customer ahead for delays.

Tracking Your Order:

  • Once your order ships, you will receive a confirmation email with a tracking number. You can use this tracking number to track the progress of your shipment on the carrier's website.

Warranty Policy

Warranty Policy

At WattCycle, we stand behind the quality and performance of our batteries. We offer a comprehensive warranty to ensure your satisfaction with your purchase.

Please read the product manual carefully before installing and using the product, and use the battery correctly under the instructions of the manual.

Warranty Period

WattCycle warrants that the product will be free from defect in workmanship and material to the original consumer purchaser.
The warranty period starts on the date of purchase by the original consumer purchaser.

  LiFePO4 Batteries (>50Ah) LiFePO4 Batteries (≤50Ah) Cells / Like New Batteries LiFePO4 Battery Charger Accessories
Website 5+2 Years 3 Years 3 Years 3 Years 1 Year
Amazon 5+2 Years 3 Years 3 Years 3 Years 1 Year
Temu 5+2 Years 3 Years 3 Years 3 Years 1 Year
Ebay 5+2 Years 3 Years 3 Years 3 Years 1 Year

Note: Only registered customers can extend the warranty service by 2 years. Final interpretation rights belong to WattCycle.

Question: Will my lithium battery still be covered under warranty after being connected in series or parallel?

Answer: As long as your product meets the warranty conditions and you have registered for the warranty, you will receive the corresponding warranty period. Connecting the batteries in series or parallel (or other normal operations) will not affect your product's warranty duration.

Warranty Statement

Any defects in material, workmanship of your product will be covered after you provide any valid proof of purchase and information including but not limited to:

1. A purchased order number made through WattCycle official stores.
2. Sales invoice or order confirmation email that clearly shows the description of the product, its price, and sales channel.

Note: The limited warranty is restricted to the country of purchase. The warranty will be invalid on the items once they are taken or shipped to other countries.

Exclusions of Warranty 

1. Misused, abused, damaged by accident or damaged due to force majeure. (e.g. lightning strikes, tornadoes, hurricanes, etc.);
2. Unauthorized modification, repair, dis-assembly or operation not in accordance with the official instructions or manuals;
3. Lost, stolen or full refunded product;
4. Warranty period expired;
5. The battery model on the warranty certificate does not match the actual item;
6. Product wear and tear through the usage of time.

Procedures for Warranty Claims

We’ll assist to analyze the consumer’s problem within 24 hours, and help solve the problem, restore battery usage, and introduce the optimal use method.

If our product fails to work normally, the consumer assists us in completing all the battery testing, and both parties confirm that the product does have quality problems, we’ll send a new battery replacement to the defective battery after it has been returned to our US warehouse by the pre-paid label we prepared. And the defective battery will be checked and tested by our technical team to analyze the problem.

From the date of purchase and within 6 months, if our products have quality problems and cannot work normally, we can provide replacement or refund services; Within 7 months from the date of purchase to the end of the warranty, if our products have quality problems and cannot work normally, we can provide replacement services.

Any product(s) returned for valid warranty service will be shipped at the expense and risk of us. We will provide a pre-paid label to customers who need to return the products to the designated place at the specified time.

Batteries that have been serviced or replaced under their warranty period do not receive extended warranties. Instead, the serviced/replaced battery(-ies) will abide by the original warranty period issued when first purchased.

Changes to This Policy:

We reserve the right to modify this Warranty Policy at any time. We will post any changes to this policy on our website.

Contact Us:

If you have any questions about our Warranty Policy, please feel free to contact us at service@wattcycle.com.

We encourage you to read this warranty policy carefully. By purchasing a WattCycle battery, you agree to the terms and conditions of this warranty.

Youtube Reviews

Perfect Choice for Lead-acid Replacement

Save energy from today!

Reviews (8)

Customer Reviews

Based on 8 reviews
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D
DIII
Good quality

I was impressed with a YouTube review of this battery and have found it to be everything I expected. A glitch in their "service tips" section of their website led to a stream of phishing ads but when I brought it to their attention, they immediately corrected it. I am impressed with their customer response so far.

Thank you for sharing your experience and for bringing the website issue to our attention!
We’re so glad to hear that our battery has met your expectations and that our quick response to your concern left a positive impression. Customer feedback is invaluable to us, and we’re committed to ensuring a seamless experience for all. If you have any other suggestions or questions, feel free to reach out support.us@wattcycle.com—we’re always here to help! 😊

D
David

Great product, fairly light for the amount of power you get. It was fully charged when it arrived.

J
JoeMcc
Price point is amazing

Great product and amazing price. I purchased these for the Rv after watching a couple YouTube videos where they opened the battery to check the component quality. A grade cells and well built. I bought a second one.

O
OldPappy
Economical to power a small camper 12v system

I added a 12v/USB power socket distributer. Right now this battery powers a 12v, 55 watt electric blanket for winter camping and I've used it to charge a 300 watt Jackery power system. Will Prowse has a great review on his youtube channel.

H
Herrick Smith
Great Power Delivery and Capacity

I bought this battery for use with our trolling motor on our john boat. We traveled several miles full throttle (Minn Kota 50# thrust motor) running crab pots and when we got back the battery still had 60% charge remaining.

Thank you for sharing your experience!
We're thrilled to hear that the battery performed so well with your trolling motor and lasted through several miles of use. It’s always great to know our products are helping you get the most out of your adventures. If you have more fishing trips ahead, we’re confident your battery will keep powering your journey.

Payment & Security

Payment methods

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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Wattcycle 12v 100ah Lifepo4 Group 31 Battery Review. Amperage over the top...

How to Choose the Version

Version
Size 9.0 x 5.6 x 8.2 inch 10.2 x 6.6 x 8.2 inch (Group 24) 13.0 x 6.9 x 8.7 inch (Group 31)
Weight 20.8 lbs 23.0 lbs 26.0 lbs
Nominal Voltage 12.8V 12.8V 12.8V
Energy 1280Wh 1280Wh 1280Wh
BMS 12.8V 100A 12.8V 100A 12.8V 110A
Bluetooth × ×
Low-tem Protection
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12V 100Ah Pro Lithium Battery Tech Specs

GENERAL

Dimensions (Inches) 13.0 (L) x 6.9 (W) x 8.7 (H) 
Weight 23.0lbs
Waterproof Rating IP65
Warranty 7 years
Housing Material ABS (Flame Retardant Plastic)
Terminal M8 bolts

12V 100AH Pro Battery

Cell EV Grade A+ LiFePO4 Cells
Nominal Voltage 12.8V
Nominal/Usable Capability 100Ah
Energy 1280Wh
Cycle Life 5,000+ cycles @100% DOD, 6,000+ cycles @80% DOD, 15,000+ cycles @60% DOD
Max Depth of Discharge (DOD) 100%
Max. Expansion 4S4P
Internal Resistance ≤40mΩ

Battery BMS

BMS 110A
Max. Continuous Output Power 1408W
Max. Continuous Charge Current 110A
Max. Continuous Discharge Current 110A
Max. Discharge Current 300±50A (≤5s)

12V 100AH Pro Lithium Battery Charge Specs

Charge Voltage 14.6V ± 0.2V
Charge Method CC / CV
Recommend Charge Current 20A (0.2C)
Charge Temperature 0℃ to 50℃ / 32℉ to 122℉
Discharge Temperature: -20℃ to 70℃ / -4℉ to 158℉
Storage Temperature -10℃ to 50℃ / 14℉ to 122℉
Low-Temperature Protection Yes (32℉/0℃)
Low-Temperature Charging Protection Auto Recovery Yes (41℉/5℃)