RLB-12V 300Ah LiFePO4 Battery

$759.00 $1,459.00( / )
12.8V 300Ah LiFePO4 High-Performance Battery   Our RLB 12V, 300Ah Lithium Deep Cycle Lithium Iron Phosphate (LiFePO4) battery is ready to replace the heavy-duty lead-acid battery pack in your sailboat, RV, or solar system. The true 300 Amp Hour LiFePO4 battery is only 60 pounds and provides 100% of its rated...
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12.8V 300Ah LiFePO4 High-Performance Battery

  Our RLB 12V, 300Ah Lithium Deep Cycle Lithium Iron Phosphate (LiFePO4) battery is ready to replace the heavy-duty lead-acid battery pack in your sailboat, RV, or solar system. The true 300 Amp Hour LiFePO4 battery is only 60 pounds and provides 100% of its rated capacity. Gives you the flexibility to replace multiple smaller, heavier lead-acid batteries in a single high-capacity unit. LiFePO4 batteries are lighter in weight, take up less space, and last longer. Although the upfront cost is higher than Gel, AGM, or Lead-Acid, the total cost of ownership decreases over time because they are maintenance-free and last up to 10 times longer. The RLB 300Ah lithium batteries provide highly reliable performance for RVs, campers, sailboats, and battery-operated solar systems in any climate or condition.

300Ah LiFePO4 Battery Application:

  • Trolling Motors
  • Fishfinders, flasher, and boating electronics
  • Recreational Vehicles
  • RV Battery Upgrade
  • Floor Machines
  • Mobility Scooter
  • Home PV Solar & Power wall
  • Emergency lighting
  • Industry Battery
  • Remote power
  • Security backup systems
  • On/Off-grid system
  • Other LiFePO4 Replacement for SLA 12V applications.


300Ah LiFePO4 Battery Specifications:



Nominal Voltage


Rated Capacity




Discharge Current


Discharge End Voltage


Charging Current(Recomm.)


Charging Voltage


Charging Mode


Charging Temperature

0 to 45

Discharge Temperature

20 to 60





Case Material


Cycle Life

Up to 3,000 Cycle


2 Years



Q. Will the IPS-M3600LFP work in my RV?

A: YES! The RLB300 is a reliable and effective alternative to lead-acid batteries in an RV, travel trailer, or camper. The weight and size of the lead-acid battery pack are sometimes not feasible in smaller RVs. Also, lithium batteries require no maintenance, and no ventilation, and can be mounted in any location. Typical lead-acid RV batteries only allow you to use about 50% of their rated capacity, while lithium batteries are ideal for taking on-the-go wilderness camping on the road. The RB300 has a highly sustainable voltage level that provides 99% of the available capacity, allowing you to have more free time at home.


Q. Can the IPS-M3600LFP be connected in series or parallel? 

A: Yes. The RLB300 can be connected in series or parallel. Difference between parallel and series: parallel connection involves connecting 2 or more batteries to increase the capacity of the battery pack. In this case, the positive extremes of all the cells are connected and the negative extremes are connected until the desired capacity is reached. A series connection involves connecting 2 or more batteries to increase the voltage of the battery system. The positive terminal of one battery is connected to the negative terminal of the other battery until the desired voltage is obtained. For example, if 2 x 12V batteries are connected in series, the battery system will be 24V.




Because of the Coronavirus and outrageous demand of the Impress order processing can take up to 2-5 business days.

The speed of batteries receive depends on the following factors

  • Whether the lithium ion battery needs to be customized: For personalized products, such as battery size, customized current, smart software battery customization, etc., it may take some time to make before delivery. For the exact delivery time, please contact us at
  • The express delivery: Orders typically take 15-20 business days to reach international destinations, but can sometimes take as long as 4-6 weeks for some destinations. It ultimately depends on where you live and what you've ordered... we wish we could give better specifics than that, but due to the complexities of international shipping we cannot. After order, you will receive a tracking email from us. You can go back to our Track My Order and input your tracking number to track the location of your goods at any time.

We have multiple shipping locations worldwide. We locate our primary warehouse in Hong Kong, however, we also have shipping capability originating from the U.S. Thus we ship origination for each order primarily based on a customer's physical address. Our goal is to use the fastest and safest method to deliver our products to our customers.

Expedited International Shipping

We only offer an expedited service option to select international markets due to the complexities and cost of international duties associated with expedited shipping.


All orders will typically be within 2-5 business days from our warehouse and all orders will include tracking from dispatch to delivery. We will ship all ordered in durable packaging to ensure it does not damage your purchase during transit. Impress is not responsible for delays, lost or damaged shipments, or orders sent to incorrect, invalid addresses, or correct addresses. It is always in our best interests to make sure you receive parcel timely manner and Impress will assist as much as possible to trace a missing parcel. Impress is not responsible for or refunds shipping costs in the event of delayed shipping of product availability.

Missing, Lost, or Stolen Package 

If your package is missing or lost, we advised you to contact the shipping courier that's assigned to your shipment. We have no control over the shipment of your package once we hand it to the courier.

If the shipment status says “Delivered” but you didn’t receive the package, you must contact the courier. Sometimes they drop off the package at your local post office or they leave the package to your neighbor if you are not home on the day of delivery. 

Damage or Defect 

As we try our best to provide exceptional service, some factors like shipping and handling are outside of our control, and issues like this can happen.

If your goods are damaged, you can send us a photo and a video showing the damage or defect. You can send it to our customer support team to help you get through the problem you are having. 

If you need further help regarding your order, you can contact us on our email or you can contact us.

    End of 2019, an epidemic--COVID19 sweeping the world disrupted our businesses, After consultation with our co-founders, decided to bring our new business——Looking for more RLB Series Battery Dealers, Offering battery wholesale for our agents.

Why become an IMPRESS Dealer?

Product Innovation 

To remain competitive, battery technology must evolve. Today, the industry demands innovations that offer unparalleled power, performance, and longevity. The IMPRESS LiFePO4 battery does just that and surpasses existing batteries on the market.

Technical Support 

When you become an IMPRESS dealer, know that you have a team of experienced industry experts behind you. Our engineering, applications, and sales teams have been in the industry for over 10 years and have a wealth of combined experience with batteries. Lithium batteries are still understood by many consumers, so we make sure you get the training, engineering, and sales support to meet your business needs.

Quality Assurance

With a focus on quality, we can ensure that you install quality products in your customers' battery-powered vehicles, recreational vehicles, home energy storage, and more. We see our standards, flexibility, and expertise as a competitive advantage.

OEM supply

We have been in the energy business since the beginning of our career as a distributor and understand the importance of branding to some distributors. We understand the need for cash flow, there is no minimum order quantity, we can generally wholesale our existing lithium batteries in packs of 10, greatly reducing the cash flow constraints for our distributors.

Contact Us for Dealer

We've been in the battery business for 12 years and have learned how to build on our success. We will work closely with you to build on your success. Not only do we provide batteries, but we also offer unparalleled service, training, and ongoing support. Our products are batteries, but we are in the business of building relationships and helping you succeed.

If you are interested, please send an email to our Support team:

Custom Built to Your Standards

  Lithium-ion batteries are rechargeable, and lithium ions change from an anode to a cathode when discharged, and from an anode to a cathode when charged. Compared to lead acid batteries, it is lightweight, small, and has a long life.  This core attribute makes it the perfect element for many new design solutions. Lithium-ion batteries are available in unique custom battery pack designs.

  Sometimes finding the ideal battery difficult. Standard batteries may not fit, or more energy or power is required to keep applications running at top capacity.Impress energy battery has the skill and ability to custom design li-ion battery packs to meet your specification. We can also design tested and trusted solutions based on your requirements in a different industry such as UPS, Solar, and Wind application, telecom tower reserve battery, medical equipment, etc Energy storage system; electric bike, scooter, trike, golf trolley, marine, etc transport vehicle, AGVs, Robot, Drone and other motive power batteries.

  Our design team will discuss all the relevant specifications with you. Impress will find the most suitable and cost-effective solution for you.


Lithium Battery Custom solution

Our Process 
  We understand the application’s requirements with you, identify the best solution, design a custom battery solution to specification, and collaborate with you to bring it to life.

Accelerate Time to Market
  Add the Impress team and you’ll add critical capacity, experience, and engineering talent across the entire development cycle. Leverage our expertise to innovate faster, shorten time to revenue growth, and minimize costly delays across planning, design, prototyping, proof-of-concept, and testing.

Improve customer experience
  Each Impress lithium battery is a quality product that we have worked hard to develop over the years. The quality is the same whether our name or your name is on the product. The reliability, resiliency, and performance of Impress that our customers appreciate will also be your qualities that your customers appreciate.

  Impress battery prides itself on its durable battery and stable battery management system, making full use of the manufacture of customized battery packs. Contact us or email us at and we'll get back to you with an advantageous custom lithium battery solution as soon as possible!