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:

• 36V 40Ah capacity (expandable to 80Ah in parallel)

• Built-in Bluetooth monitoring via iOS & Android app

• Only 33 lbs—saves up to 150 lbs vs SLA setups

• Group 31 footprint for easy drop-in replacement

• LiFePO4 chemistry: 4000+ cycles, zero maintenance

• Plug-and-play installation: no rewiring required

• Parallel capable for extended runtime

Perfect For:

• 36V trolling motors

• Minn Kota, Garmin, Lowrance, Rhodan, and all major trolling motor brands

• Anglers seeking lighter, more efficient power

• 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