Monster Marine Lithium | 36V 73Ah Bluetooth Lithium Trolling Battery MML-3673B "Titan"
36V 73Ah Bluetooth Lithium Trolling Battery – MML-3673B "Titan"
Massive Power. Minimal Weight. Maximum Performance.
Meet the MML-3673B "Titan", your all-in-one power solution for serious 36V trolling motor setups. This 36V 73Ah Bluetooth lithium trolling battery is engineered to replace three traditional lead-acid or gel marine batteries—saving over 150 lbs and freeing up precious space on your boat.
Despite its powerful capacity, the Titan weighs just 42 lbs and fits into a Group 31 case with a slightly taller profile—making it a direct drop-in upgrade for your existing system.
Built with Lithium Iron Phosphate (LiFePO4) technology, it delivers twice the power, a fraction of the weight, and lasts 4x longer than standard sealed lead-acid options. Whether you're navigating strong currents or running electronics all day, the Titan delivers.
Need more runtime? Easily wire two in parallel to double your capacity to 146Ah.
Now featuring Bluetooth connectivity, you can monitor your battery’s status in real time using our mobile app—so you’re always in control.
Key Features
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36V 73Ah lithium deep cycle marine-grade power
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Built-in Bluetooth monitoring (iOS & Android compatible)
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Replaces (3) 12V lead-acid or gel batteries
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Weighs just 42 lbs (over 150 lbs lighter than SLA setups)
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Drop-in fit in Group 31 battery trays (slightly taller case)
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4000+ charge cycles for long-lasting reliability
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Built-in BMS protection
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Parallel capable: Connect two for 146Ah total
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Plug-and-play installation
Ideal For
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36V trolling motors (Minn Kota, Garmin, Lowrance, Rhodan, and more)
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Anglers who demand extended runtime and lighter setups
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Lithium upgrade from (3) SLA 12V batteries
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High-performance marine electronics
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Rugged fishing conditions and strong water currents
Specification
Weight
42lbs
Size Dimensions
L 13 in (330mm) x W 6.77in (172mm) x H 9.5 in (241mm)
Voltage
38.4V
Energy
2803 Watts (Wh)
Amp-Hours
73Ah
Charge Volts
43.8v
Max charge current
50A
Discharge Continuous Amps
100A max
Terminals
M8 stainless bolt
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We do not sell any used or refurbished items.
Frequently Asked Questions
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