Home PowerTex Batteries BCI Group 27M Dual Purpose Lithium Deep Cycle & Cranking LiFePO4 RV & Marine Battery

PowerTex Batteries BCI Group 27M Dual Purpose Lithium Deep Cycle & Cranking LiFePO4 RV & Marine Battery

Sale price $799.99
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  • Group Size - 27M Dual Terminal
  • Voltage - 12.8 V
  • Weight - 23 lb.
  • Capacity - 105 Ah
  • Cranking Amps - 1400 CA
  • Dimensions - 12.0 in x 6.8 in x 8.7 in
  • Warranty - 5 Years
  • Built-in jump starting capability.
  • Fully integrated battery management system (BMS).
  • Bluetooth connectivity for real-time monitoring via smartphone app.
  • Provides strong cranking amps for engine starts and sustained energy for trolling motors, fish finders, RV appliances, and other electronic loads
  • For marine applications, including outboard motors, and meets Mercury Marine® criteria for compatibility with approved list of outboard models.

Most items ship within 24 hours, excluding weekends and major holidays.

Return within 30 days of delivery. Shipping fees are non-refundable.

PowerTex Batteries BCI Group 27M Dual Purpose Lithium Deep Cycle & Cranking LiFePO4 RV & Marine Battery

PowerTex Batteries BCI Group 27M Dual Purpose Lithium Deep Cycle & Cranking LiFePO4 RV & Marine Battery

$799.99

Powertex BCI Group 27M Dual Purpose Lithium Battery

Why Choose Powertex PTLG27M?

Engineered for Performance. Built to Last.

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Cranking & Deep Cycle in One

Delivers high cold-cranking amps (CCA) for reliable engine starts while providing sustained power for trolling motors, fish finders, RV electronics, and other onboard systems.

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Marine & RV Optimized Design

Built to withstand harsh marine conditions with superior vibration resistance, corrosion protection, and an IP67 waterproof rating. Designed to operate in temperatures ranging from -4°F to 140°F.

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Longer Cycle Life & Cost Savings

With up to 8,000 cycles, Powertex lithium batteries significantly reduce replacement costs. Enjoy reliable performance with fewer replacements, offering a lower total cost of ownership for your boat or RV over time.

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Built-In Jump Starting

Never get stranded! If the battery runs low, simply press the built-in jump-start button to instantly restart your engine—no cables or external assistance needed.

Bluetooth Connectivity

Monitor real-time data such as voltage and current. The app also allows you to remotely turn off the battery, preventing unnecessary discharge when not in use.

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Battery Management System (BMS)

Protects against overcharge, over-discharge, short circuits, and most common battery faults, ensuring safety and optimizing performance for reliable power.

Maximized Longevity for Marine & RV Applications

Powertex Group 27M Dual-Purpose Lithium Battery is engineered to handle both high-cranking power and deep-cycle demands, making it ideal for center consoles, bass boats, and larger vessels, where it provides reliable engine starting and sustained power for electronics. It also excels in powering trolling motors and fish finders with extended runtime and minimal voltage drop. In RV and camper applications, this battery serves both as a chassis (starter) and a house battery for appliances and accessories, offering versatility for a variety of needs. With a high discharge rate and faster recharging, it keeps up with the demands of modern marine and RV systems.

Battery Management System (BMS)

Experience peace of mind with our cutting-edge Battery Management System (BMS), acting as a vigilant protector against overcharge, over-discharge, and short-circuit incidents. This intelligent system tirelessly monitors and controls battery performance, ensuring both your safety and the durability of your investment.

Optimized for Inboard & Outboard Motors

Powertex lithium batteries deliver the reliable cranking power needed to start inboard & outboard motors, including Mercury Marine®-approved models. With faster charging, lightweight construction, and superior cycle life, they provide consistent, high-performance starts while reducing overall boat weight for improved fuel efficiency and handling. Built to endure harsh marine conditions, these batteries ensure trouble-free operation on the water, making them the ideal choice for powering your outboard motor with confidence.

Built for Marine Conditions

Marine environments demand durability, and Powertex batteries are built to handle it all. With IP65 and IP67 waterproof ratings, they resist water intrusion, while their robust construction ensures resistance to vibration, impacts, and extreme conditions. Whether you're fishing offshore, cruising, or relying on house batteries for onboard power, Powertex lithium batteries deliver the reliability and longevity you need.

Unmatched Safety Standards

Powertex LiFePO4 batteries undergo rigorous testing to meet the highest safety standards. With UL-certified Grade A cells, they are built to withstand pressure, collisions, and extreme environments. Certified with UN38.3, MSDS, 62133, and 62619, ensuring the highest level of reliability for your boat or RV.

Internal Jump-Starting Capabilities

Say goodbye to depending on external jump starting! Our battery is built with an internal jump start feature, easily activated by a button if your battery runs low or the BMS is triggered. Enjoy uninterrupted operations wherever and whenever you need it!

Bluetooth Connectivity for Easy Monitoring

Take full control of your battery with Bluetooth connectivity. Using the Powertex app on your smartphone, you can monitor your battery’s voltage, current, and status in real-time. Additionally, you can turn off the battery to prevent any potential discharge when your boat or RV is not in use, ensuring it stays ready for your next adventure.

Frequently Asked Questions
Powertex LiFePO4 BCI Group 27M Dual-Purpose Battery – The Ultimate Marine & RV Power Solution

Reliable Power for Starting & Deep Cycle Needs


Introducing the Powertex LiFePO4 BCI Group 27M Dual-Purpose Battery—engineered for both high-performance cranking and deep-cycle applications. Whether you're starting your boat’s engine or powering onboard electronics, this lithium battery ensures superior reliability, longevity, and efficiency compared to traditional lead-acid batteries.

Now Approved for Mercury Marine® Outboards


Mercury Marine® has officially recognized lithium starting batteries for select outboard models, ensuring boaters achieve optimal performance. The Powertex Group 27M battery meets Mercury’s specifications, delivering powerful and reliable engine starts while providing sustained energy for marine electronics.

Key Benefits:

  • Cranking & Deep Cycle in One – Delivers high cold-cranking amps (CCA) for reliable engine starts while providing sustained power for trolling motors, fish finders, and RV appliances.
  • Bluetooth Monitoring & Control – Track real-time battery status, including voltage, state of charge, and performance data, directly from your smartphone.
  • Remote Battery Shutoff – Turn the battery off via the Bluetooth app when your boat or RV is not in use to prevent unwanted discharge and extend battery life.
  • Mercury Marine® Approved Compatibility – Designed to meet Mercury’s lithium battery requirements for an approved list of outboards, ensuring reliable starting power.
  • Longer Cycle Life – Offers up to 20 times the cycle life and five times the float/calendar life of lead-acid batteries, reducing replacement costs and total cost of ownership.
  • Lighter Weight – Weighs approximately 40% of a comparable lead-acid battery, making installation and handling easier. A true "drop-in" replacement.
  • Higher Power Output – Delivers twice the power of a lead-acid battery, even at high discharge rates, while maintaining a high energy capacity.
  • Advanced Battery Management System (BMS) – Protects against overcharge, over-discharge, short circuits, and extreme temperatures for enhanced reliability.
  • Built-In Jump-Start Button – Instantly restores power in the event of a discharge, eliminating the need for external jump-starting assistance.
  • Fast Charging – Charges significantly faster than lead-acid alternatives, minimizing downtime.
  • Wider Temperature Range – Operates effectively in extreme conditions, from -4°F to 140°F.
  • Superior Safety – Lithium Iron Phosphate (LiFePO4) chemistry eliminates explosion or combustion risks due to high impact, overcharging, or short circuits.
  • Increased Flexibility – Modular design allows for up to four batteries to be connected in parallel for expanded capacity.
  • Water & Vibration Resistant – Built to withstand harsh marine environments with IP65 and IP67 waterproof ratings.

Optimized for Marine, RV & Camper Vans


Perfect for marine applications, this battery is compatible with outboard motors and onboard electronics. It’s also ideal for RVs and camper vans that require both engine-starting power and reliable deep-cycle energy for off-grid adventures.

Safety & Certifications


Built with UL-certified Grade A cells, our battery is puncture-resistant, fire-safe, and meets strict UN38.3, MSDS, IEC 62133, and 62619 safety standards.

Power Your Adventures with Confidence!


Upgrade to Powertex LiFePO4 technology for a dependable, high-performance dual-purpose battery that keeps you moving—whether on land or at sea.

Electrical Characteristics

  • Nominal Voltage - 12.8V
  • Nominal Capacity - 105Ah
  • Internal Resistance - ≤ 20mΩ
  • Cycle Life - > 3000 cycles @1C 100%DOD
  • Monthly Self-Discharge Rate - < 3%
  • Charging Efficiency - 100% @ 0.5C
  • Discharge Efficiency - 96 ~ 99% @ 1C

Charging Information

  • Charge Voltage - 14.4 ± 0.1V
  • Recommended Charging Current - < 50A
  • Max Charging Current - 100A
  • Charging Cut-Off Voltage - 15.0V ± 0.1V

Discharge Information

  • Continuous Current - 100A
  • Cold Cranking Amps (CCA) - 1,000A
  • Marine Cranking Amps (MCA) - 1,200A
  • Cranking Amps (CA) - 1,400A
  • Discharge Cut-Off Voltage - 10V

Environmental Information

  • Charging Temperature - 32F to 113F @ 60 ± 25% Relative Humidity
  • Discharge Temperature - -4F to 140F @ 60 ± 25% Relative Humidity
  • Storage Temperature - 32F to 104F @ 60 ± 25% Relative Humidity
  • Water Resistance - IP67

Mechanical Information

  • Cell & Configuration - Prismatic & 4S1P
  • Dimensions (LxWxH) - 12.0 × 6.8 × 7.9/8.7 inches
  • Weight - 23.5 lbs
  • Terminals - SAE/M8 Stud & SAE/M8 Threaded Post
  • Parallel Config. - 4 Pieces Max
  • Bluetooth Funciton - Via Powertex Batteries App.

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