The MillerTech 36V 60Ah Heated Bluetooth Lithium Battery delivers dependable trolling motor power in a lightweight, single-battery design. Part of MillerTech's Sport Series, this LiFePO4 battery provides 2,304Wh of energy storage, built-in Bluetooth monitoring, and an integrated heating system for cold-weather charging.
Designed for compatible 36V trolling motors, the MillerTech 3660-BTH replaces three traditional 12V batteries connected in series. Weighing approximately 41 lbs., it offers a compact alternative to conventional lead-acid battery setups while delivering consistent power throughout the discharge cycle.
Key Features
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Single 36V Battery Solution: Replaces three 12V batteries connected in series for compatible 36V trolling motor systems.
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60Ah Lithium Capacity: Provides 2,304Wh of energy storage for dependable trolling motor performance.
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Integrated Battery Heater: Automatically activates when connected to a charger and battery temperature drops below 32°F, helping maintain safe charging temperatures.
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Built-In Bluetooth Monitoring: View battery status, charge level, and performance through the MillerTech smartphone app.
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Lightweight Group 31 Design: Weighs approximately 41 lbs., reducing battery weight compared to many traditional three-battery setups.
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Advanced Battery Management System: Provides integrated battery protection during charging and discharging.
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Marine-Grade Construction: IP65-rated sealed case with a stainless steel breather vent and heavy-duty terminals.
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Serviceable Battery Case: Custom-molded enclosure features a removable lid and molded hold-down strap grooves.
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10-Year Manufacturer Warranty: Backed by MillerTech's Sport Series battery warranty.
Specifications
| Specification |
Details |
| Manufacturer |
MillerTech |
| Part Number |
3660-BTH |
| Series |
Sport Series |
| Battery Chemistry |
LiFePO4 Lithium |
| Nominal Voltage |
38.4V (36V Class) |
| Capacity |
60Ah |
| Energy Storage |
2,304Wh |
| Battery Group Size |
Group 31 |
| Weight |
Approximately 41 lbs. |
| Dimensions |
12.92" L × 6.78" W × 8.75" H |
| Maximum Charging Voltage |
43.2V |
| Maximum Charging Current |
60A |
| Recommended Charging Current |
10A |
| Continuous Discharge Current |
60A |
| Peak Discharge Current |
180A (5 Seconds) |
| Recommended Low-Voltage Disconnect |
36V |
| Bluetooth Monitoring |
Yes |
| Integrated Heating |
Yes |
| Case Protection |
IP65 |
| Manufacturer Warranty |
10 Years |
Built-In Heating for Cold-Weather Charging
The integrated heating system activates when the battery is connected to a charger and its internal temperature drops below 32°F.
This feature helps bring the battery to a safe charging temperature before charging begins, making it especially useful for anglers fishing during early spring, late fall, and colder weather.
Trolling Motor Compatibility
Designed for compatible 36V trolling motor systems, including select models from:
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Minn Kota
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Garmin
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Lowrance
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Power-Pole
Always verify your trolling motor manufacturer's lithium battery requirements, operating voltage range, and current demands before installation.
Charging Requirements
Use a compatible 36V LiFePO4 lithium battery charger with the appropriate charging profile.
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Maximum charging voltage: 43.2V
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Maximum charging current: 60A
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Recommended charging current: 10A
Standard 12V and 24V chargers are not suitable for this battery.
Why Choose MillerTech?
MillerTech Sport Series lithium batteries are designed for anglers who want dependable trolling motor power without the weight and maintenance of traditional lead-acid battery systems. With integrated heating, Bluetooth monitoring, rugged marine construction, and a 10-year manufacturer warranty, the 3660-BTH is an excellent choice for upgrading a compatible 36V trolling motor system.
