12v 40Ah Deep Cycle Lithium Marine Battery "Viper" – Bluetooth | MML-CW1240B

Smart Power. Lightweight Design. Ultimate Performance.

The 12v 40Ah Deep Cycle Lithium Marine Battery "Viper" – MML-CW1240B is your go-to solution for powering 12V electronics in kayaks, ice fishing rigs, and portable outdoor setups. Designed with cutting-edge LiFePO4 technology, this battery offers twice the power, four times the lifespan, and a fraction of the weight of traditional sealed lead-acid batteries—weighing only 11.5 lbs.

Equipped with built-in Bluetooth, the "Viper" lets you track voltage, temperature, and charge status in real-time via the Monster Marine Lithium app, available for iOS and Android. Whether you’re off-grid or on the water, you’ll always know how your battery’s performing.

Key Features:

• Bluetooth Monitoring
  Stay in control with real-time data on your battery through your smartphone.

• Ultra-Lightweight at 11.5 lbs
  Ideal for space-saving installs in kayaks, sleds, or compact setups.

• Plug-and-Play Simplicity
  No complicated wiring—just connect and go.

• High Output & Efficiency
  Stable 12.8V output with over 4000+ charge cycles for long-term reliability.

• Modular Expansion

  • Series Connection: Up to 4 batteries for 24V, 36V, or 48V systems

  • Parallel Connection: Increase amp-hour capacity for longer runtimes

Compatible Chargers:

To ensure optimal charging, use AGM-mode chargers such as:

• Minn Kota (Precision & Digital)

• Dual Pro

• NOCO

• Real Pro

• Pro Sport

All chargers must support AGM charging capabilities.

Specification

Size Dimensions
L 7.5 in (195mm) x W 5in (130mm) x H 6.5 in (154mm)

Voltage
12.8V

Energy
512Wh

Weight
11.5 lbs

Amp-Hours
40Ah

Charge Volts
14.6v
Max charge current 40A

Continuous Discharge Amps
60A max

Terminals
M6 bolt