Monster Marine Lithium | 36V 40AH Bluetooth Deep Cycle Lithium Marine Trolling Battery MML-3640B
36V 40AH Bluetooth Deep Cycle Lithium Marine Trolling Battery | MML-3640B
One Battery. Triple the Power. None of the Bulk.
The MML-3640B is the ultimate 36V trolling motor power solution, engineered for serious anglers who demand lightweight, long-lasting performance. This single battery replaces three traditional 12V marine gel or lead-acid batteries, cutting approximately 150 lbs of unnecessary weight—all while delivering superior run time and Bluetooth monitoring right from your phone.
Housed in a standard Group 31 case, the MML-3640B fits directly into your existing setup. Built with premium Lithium Iron Phosphate (LiFePO4) technology, it delivers twice the power, a fraction of the weight, and up to four times the lifespan of sealed lead-acid batteries.
Need more capacity? Simply wire a second 36V battery in parallel (positive to positive, negative to negative) to expand your amp-hour capacity to 80Ah.
Key Features:
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36V 40Ah capacity (expandable to 80Ah in parallel)
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Built-in Bluetooth monitoring via iOS & Android app
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Only 33 lbs—saves up to 150 lbs vs SLA setups
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Group 31 footprint for easy drop-in replacement
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LiFePO4 chemistry: 4000+ cycles, zero maintenance
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Plug-and-play installation: no rewiring required
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Parallel capable for extended runtime
Perfect For:
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36V trolling motors
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Minn Kota, Garmin, Lowrance, Rhodan, and all major trolling motor brands
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Anglers seeking lighter, more efficient power
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Replacing (3) 12V SLA batteries with a single smart solution
Specification
Weight
33 lbs (14.9Kg). 60% lighter than 1 SLA battery!
Size Dimensions
L 13 in (330mm) x W 6.77in (172mm) x H 8.66 in (220mm)
Voltage
38.4V
Energy
1536 Watts (Wh)
Amp-Hours
40Ah
Charge Volts
43.8v
Max current 40A
Continuous Discharge Amps
100A max
Terminals
M8 stainless bolt
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We do not sell any used or refurbished items.
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Frequently Asked Questions
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