SKU: 70939898685

RELiON RB300 LiFePO4 12V 300Ah Lithium Battery - Waterproof, 10 Year Warranty, Ideal for Marine, RV, Off Grid - Blue

Sale price$1270.32 Regular price$1411.47
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Description

RELiON RB300 LiFePO4 12V 300Ah Lithium Battery - Waterproof, 10 Year Warranty, Ideal for Marine, RV, Off Grid - BlueThe RELiON RB300 is a high performance lithium iron phosphate battery designed to replace traditional lead acid batteries in sailboats, RVs, and solar energy systems. Weighing only 82 lbs, this 300 Amp Hour lithium battery offers a lightweight solution without compromising on power or reliability. Constructed with durable plastic materials, the RELiON RB300 is engineered for optimal performance and longevity. This battery delivers 100% of its rated

The RELiON RB300 is a high-performance lithium iron phosphate battery designed to replace traditional lead-acid batteries in sailboats, RVs, and solar energy systems. Weighing only 82 lbs, this 300 Amp Hour lithium battery offers a lightweight solution without compromising on power or reliability.

Constructed with durable plastic materials, the RELiON RB300 is engineered for optimal performance and longevity. This battery delivers 100% of its rated capacity, ensuring you have the energy you need for your adventures. Its advanced technology allows for fast charging, making it an ideal choice for those who require quick replenishment of power. The RB300 is also designed to function effectively in various environmental conditions, proving to be a reliable energy source whether at sea or on the road.

Key Features:
  • Lightweight Design: At only 82 lbs, the RELiON RB300 is significantly lighter than traditional lead-acid batteries, enhancing both performance and agility.
  • Fast Charging: This lithium battery charges much faster than lead-acid alternatives, allowing for quicker turnaround times when recharging.
  • Maintenance-Free: Enjoy hassle-free operation with no need for watering or corrosion management, making it ideal for busy lifestyles.
  • Partial State of Charge Tolerance: The RB300 performs well even when not fully charged, ensuring longevity and reliability in various usage scenarios.
  • Temperature Tolerance: Capable of operating safely in extreme temperatures, this battery is 2.5 times more efficient at low temperatures than lead-acid batteries.
  • Durable Construction: Made from high-quality plastic, the RELiON RB300 is built to withstand the rigors of marine and outdoor environments.
  • Longer Lifespan: With up to 10 times the lifecycle of traditional batteries, this lithium option is a cost-effective solution over time.

The RELiON RB300 lithium iron phosphate battery is an excellent choice for boaters, RV enthusiasts, and solar power users who seek a lightweight, efficient, and dependable energy solution. Its superior charging capabilities and maintenance-free design make it well-suited for those looking to enhance their power systems without the burden of heavy lead-acid batteries. Invest in the RELiON RB300 for a reliable, high-capacity battery that meets your energy needs effectively.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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SKU: 70939898685

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4.4 ★★★★★
Based on 24 reviews
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Verified Purchase
Elizabeth C
Fort Morgan, US
★★★★★ 5
A must buy for espresso lovers and limited counterspace
Color: Black
If you want an espresso machine but don’t want to go though the entire massive machines this is the perfect beginning and even moderate espresso maker for you! So much you can do with it, makes a great solid shot of espresso. No concerns so far and fast and easy to learn steps. Recommending this to all our friends and family that are interested
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Reviewed in the United States on April 14, 2026
R
Verified Purchase
Raysa
Fort Morgan, US
★★★★★ 5
Great value for your money!
Color: A-Silver
Yessss! Real espresso maker! Excellent brewing capacity. Easy to use. Made with great quality material. The machine comes with all the pamphlets & easy to read instructions which say to heat twice for extra hot coffee, but honestly the coffee comes out VERY hot & tasty without double-heating. Also comes carefully packaged to prevent damage during delivery. Great value for your money!
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Reviewed in the United States on April 10, 2026
J
Verified Purchase
Joe Martin
San Leandro, US
★★★★★ 4
Plastic, but Well Performing Machine
Color: A-Silver
My household has been using the Casabrewa 5418 PRO multiple times a day for over a month now. It's function and directions are excellent. With some experimenting, it makes acceptable and delicious espresso. This is an entry model machine that does exactly what you want it to. It heats fast and produces espresso fast. However, for the price point the amount of plastic is a bit disappointing. The machine has the appearance of being stainless steel while being constructed almost entirely of plastic. If you want an entry level espresso machine and you don't mind the plastic, this is an excellent option.
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Reviewed in the United States on November 5, 2025
G
Verified Purchase
Gk
Natrona Heights, US
★★★★★ 5
Who cares if its plastic... let's not be silly
Color: A-Silver
Why are people so obsessed with metal housing? Metal literally serves no purpose. It's just a cover. It won't make a better coffee with metal housing nor will it last longer. I personally don't care what it "feels" like to touch it, I don't even notice it. I make coffee with it, it's a tool. I don't touch it to "feel how nice it is". That's just weird. Anyway, what a great machine. To me instant heating is worth all the missing features of fancier machines combined. I've had it for several months now, and I have it dialed in. I make up to 5-6 lattes a day and I've made about a 1000 by now. Still working great. Not interested in upgrading.
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Reviewed in the United States on May 25, 2026
J
Verified Purchase
Just Because
San Leandro, US
★★★★★ 5
Great Budget Espresso Machine That Performs Better Than Others Costing Much More
Color: A-Silver
I’ve been using the Casabrews 5418 Pro for a few months now and it’s been a solid addition to my kitchen. It looks sleek and feels well‑built for the price, and it heats up extremely fast — reaching brewing temperature in just a few seconds thanks to its FlashHeat™ system. The 20‑bar pump and built‑in pressure gauge give you good feedback while pulling shots, and the steam wand produces nicely textured milk for lattes and cappuccinos.  The removable water tank is a nice touch and makes refilling easy. While it’s not perfect — the included portafilter and tamper feel a budget‑oriented and the pressurized baskets don’t deliver espresso as rich as you’d get from higher‑end machines — it’s a great performer for beginners or casual espresso drinkers. Upgrade the portafilter basket and tamper but for a more premium experience especially if using it daily. That said, the included accessories are perfectly fine for a casual user. Overall, this machine offers excellent value for the price. If you want a compact, easy‑to‑use espresso maker that consistently produces enjoyable drinks (especially milk‑based ones), this is a great choice. I am more than pleased with my purchase and you will be too. One thing that I learned and it’s the most significant piece of information I will pass along. You don’t need an espresso dark roast coffee for espresso. It’s your preferred roast, grind, and freshness that make the difference. Try your favorite roast in an espresso grind and enjoy!
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Reviewed in the United States on January 20, 2026

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