16V 65AH Marine Electronics Lithium Battery w/ BT (1665-BT)

Key Features & Benefits:

• Optimized for Marine Electronics: Unlike traditional 12V batteries, the 16V nominal voltage maintains a higher, more consistent voltage level, ensuring your electronics operate at peak performance for extended periods. This translates to clearer imaging, brighter screens, and improved signal strength for fish finders and sonar.
• Exceptional Lifespan: Built with high-grade LiFePO4 cells, this battery boasts an impressive cycle life, often exceeding 4000 cycles at 100% Depth of Discharge (DOD). This means a lifespan up to 10 times longer than lead-acid alternatives, offering significant long-term savings and reduced replacement hassle.
• Lightweight & Compact Design: Weighing significantly less than comparable lead-acid batteries, this LiFePO4 battery frees up valuable space on your boat and contributes to improved fuel efficiency and maneuverability.
• Advanced Battery Management System (BMS): A sophisticated built-in BMS provides comprehensive protection against overcharging, over-discharging, over-current, short circuits, and high/low temperatures. This ensures maximum safety, longevity, and reliable operation.
• Deep Cycle Capability: Safely discharge the battery up to 100% of its capacity without damage, providing more usable energy per charge compared to lead-acid batteries (which are typically limited to 50% DOD).
• Rapid Charging: Spend less time charging and more time on the water. LiFePO4 technology allows for significantly faster charging times compared to lead-acid batteries.
• Rugged Marine-Grade Construction: With an IP65 or higher water and dust-proof rating, this battery is designed to withstand the harsh conditions of marine environments, including moisture, salt spray, and vibrations.
• Smart Bluetooth Monitoring: Featuring integrated Bluetooth technology, allowing you to conveniently monitor essential battery parameters like State
  of Charge (SOC), voltage, current, temperature, and cycle life directly from your smartphone or tablet.
• Low-Temperature Protection: Intelligent low-temperature cut-off functions prevent charging below 0°C (32°F) and discharging below -20°C (-4°F), protecting the battery and ensuring reliable power even in cold conditions.
• Environmentally Friendly: LiFePO4 batteries are free from toxic heavy metals like lead and cadmium, making them a safer and more environmentally responsible choice.

Ideal for powering:

• Fish Finders
• Sonar Systems
• Marine GPS and Chartplotters

Upgrade your marine electronics with the reliable, long-lasting, and high-performance 16V 65Ah LiFePO4 Marine Electronics Battery, and unlock a new level of clarity and efficiency on the water.

THE MILLERTECH® SPORT SERIES LITHIUM BATTERY
10 YEAR GUARANTEED WARRANTY IS SIMPLE!

TERMS:

From the date of your battery purchase through year number 10 of ownership, your battery is covered. If it stops working during this time, we will repair or replace it with a battery of equal or greater value for FREE!

SHIPPING:

We cover all shipping costs associated with shuttling your battery back and forth for repair or replacement. It is our warranty; it is our cost; not yours.

EXCLUSIONS:

There are NONE! You trusted Millertech®, and if it’s within the warranty period your Millertech® battery is completely covered for everything!

PROOF OF PURCHASE:

You don’t need one. If it’s Millertech®, it’s covered!

FOR WARRANTY SERVICE CALL: 855-MAX-LITH

EMAIL:  warranty@millertechenergy.com

Recommended Chargers

The Millertech 16V 65Ah Marine Deep Cycle lithium battery is engineered for a max charge voltage of 18V charging profile.

1) 16V 15A On-Board Lithium Battery Charger (1615M)

A waterproof on-board lithium charger designed for 16V batteries that can be permanently mounted in a boat or similar application.

Features and Benefits

• 15A output current for charging 16V lithium batteries. 

• 18V output voltage charging profile. 

• 90-120V AC input for standard outlets. 

• IP65 waterproof rating for marine environments. 

• Compact size

  • 8″ × 5½″ × 5″ with handle

  • 8″ × 5½″ × 3″ without handle 

• Lightweight – 4.8 lbs.

Why choose it:

• • Designed for permanent mounting in boats.

  • Waterproof construction for harsh environments.

  • Compact and lightweight design saves space.

  • 3-year Millertech warranty with repair or replacement if the charger fails.

2) Millertech 12V, 16V, 24V, 3-Bank Battery Charger (Model#121624-3)

The Millertech 12V, 16V, 24V 3-Bank Battery Charger (Model 121624-3) is an onboard lithium charger designed to charge three separate batteries at the same time from one unit. It’s commonly used in marine setups where a boat has multiple batteries—such as a starting battery and an electronics battery. The charger is part of Millertech’s multi-bank lineup and is typically used when you want to charge multiple batteries overnight with a single plug-in connection.

This charger has three independent charging banks, each delivering about 15 amps, so each battery receives the proper charge without affecting the other. Because the banks are isolated, the charger automatically manages each battery individually to maintain proper charging and battery health.

Permanent Marine Installation. This is an onboard charger, meaning it is mounted permanently in the boat. After a day on the water you simply plug the boat into shore power and it charges everything automatically.

Specs

• Input Voltage: 90–130V AC

• AC Power Draw: 1,110W

• Dimensions: 10.5″ × 9.75″ × 4″

• Weight: 15 lbs

This charger has three independent charging banks, allowing you to charge multiple batteries simultaneously without needing separate chargers. Each bank can be configured for different battery voltages:

• 12V battery bank – commonly used for electronics or starting batteries

• 16V battery bank – often used for high-performance marine electronics systems

• 24V battery bank – commonly used for trolling motor batteries

3) Millertech 12V, 16V 36V, 3-Bank Battery Charger (Model#121636-3)

Same concept as #2 above, but allows 3 batteries – a  12v, 16v and 36v to be charged at once.