The MillerTech 16V 65Ah Bluetooth Lithium Battery (1665-BT) provides a dedicated power source for high-demand marine electronics. Designed for anglers running fish finders, forward-facing sonar, and GPS systems, this LiFePO4 battery delivers consistent voltage and dependable runtime without drawing power from your boat's cranking battery.
Featuring 65Ah of capacity, 1,040Wh of energy storage, and built-in Bluetooth monitoring, the MillerTech Sport Series battery is a compact solution for powering compatible 16V marine electronics.
Key Features
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Dedicated 16V Electronics Power: Provides a separate power source for compatible fish finders, sonar systems, and marine electronics.
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65Ah Lithium Capacity: Delivers 1,040Wh of stored energy for extended electronics operation.
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Consistent Voltage Output: Helps maintain stable power for demanding electronics throughout the battery's discharge cycle.
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Built-In Bluetooth Monitoring: Check battery charge level, voltage, current, temperature, and other operating information from your smartphone.
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Lightweight Design: Weighs approximately 25 lbs., making it easier to install than many traditional lead-acid batteries.
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LiFePO4 Technology: Provides long cycle life, efficient charging, and low maintenance requirements.
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Integrated Battery Management System: Protects against overcharging, excessive discharge, overcurrent, short circuits, and temperature-related conditions.
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10-Year Manufacturer Warranty: Backed by MillerTech's Sport Series lithium battery warranty.
Specifications
| Specification |
Details |
| Manufacturer |
MillerTech |
| Part Number |
1665-BT |
| Battery Series |
Sport Series |
| Battery Chemistry |
LiFePO4 Lithium |
| Nominal Voltage |
16V |
| Capacity |
65Ah |
| Energy Storage |
1,040Wh |
| Weight |
25 lbs. |
| Bluetooth Monitoring |
Yes |
| Battery Terminals |
M8 |
| Maximum Charging Voltage |
18V |
| Maximum Charging Current |
65A |
| Recommended Charging Current |
15A |
| Continuous Discharge Current |
60A |
| Peak Discharge Current |
100A for 5 Seconds |
| Low-Voltage Cutoff |
12.5V |
| Manufacturer Warranty |
10 Years |
Designed for Marine Electronics
The MillerTech 1665-BT is designed for anglers who want to separate their electronics power from their engine starting battery.
Potential applications include compatible:
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Garmin GPSMAP, ECHOMAP, and LiveScope systems
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Lowrance HDS, Elite FS, and ActiveTarget systems
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Humminbird HELIX, SOLIX, APEX, XPLORE, and MEGA Live systems
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Marine GPS, networking equipment, and other electronics
Important: Not all marine electronics support 16V input. Verify the operating voltage range of every connected device, including sonar modules and accessories, before installation. Equipment that cannot accept the battery's full operating and charging voltage may require voltage regulation.
Bluetooth Battery Monitoring
Built-in Bluetooth connectivity allows you to monitor your battery through the MillerTech smartphone app.
Check remaining battery capacity, voltage, charging and discharging current, and other battery information without opening your battery compartment.
Charging Requirements
The MillerTech 1665-BT requires a charger designed for 16V LiFePO4 lithium batteries.
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Maximum charging voltage: 18V
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Recommended charging current: 15A
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Maximum charging current: 65A
A standard 12V battery charger is not suitable for this battery.
Why Choose MillerTech?
The MillerTech 16V 65Ah Sport Series battery offers a dedicated power solution for modern marine electronics. Its combination of consistent voltage, Bluetooth monitoring, lightweight construction, and a 10-year manufacturer warranty makes it a practical upgrade for boats running multiple displays and forward-facing sonar systems.
