The Powerbox 135 is a waterproof, submersible mobile power station designed for extreme environments. It features a 135 Ah Dakota Lithium battery, providing 1,000 CCA of engine starting power and deep cycle energy. Power devices like phones, laptops, and appliances via AC wall plugs or USB ports.

 It can also power high-amp applications like trolling motors or electric coolers. The unit includes a 2000W inverter, waterproof design, and easy maintenance for extended use. With a 12V LiFePO4 battery, it’s lightweight, long-lasting, and offers both engine-starting and deep-cycle capabilities. It’s backed by an 11-year warranty.

Technical Specifications :

• Waterproof Rating: IP67 waterproof rating, making the battery submersible up to 3 feet for 30 hours with no internal moisture.
• Buoyancy: 12% of the mass above the waterline; the battery floats due to its light weight.
• Powerbox+ 135 Case: Waterproof and submersible (IP67), ruggedized military-spec plastic case with a shockproof battery cradle. Fully field maintainable for easy disassembly and repair if needed.
• Terminals & Binder Posts: Waterproof automotive binder posts for connecting trolling motors, jumper cables, or high-power applications while maintaining a waterproof seal.
• Voltmeter & External USB Plugs: Waterproof voltmeter for monitoring battery power level and external USB C & USB A ports for charging devices while maintaining the waterproof seal.
• DC to AC Inverter: 2,000W continuous, 4,000W peak DC to AC inverter with 2 AC wall plugs, 2 USB-C PD60W plugs, and a smart power use display.
• Internal Storage & Anti-Static Electronics Tray: Internal ballistic nylon bag with 3 zippered pockets for waterproof storage of personal electronics and a removable, washable anti-static silicone electronics tray for safe charging.
• Battery Included: Dakota Lithium Plus 12V 135Ah Dual Purpose 1,000 CCA battery, with complementary jumper cables included.
• Recommended Charger: 12V 10A LiFePO4 charger (sold separately), with the recommended charging voltage of 14.4V (LiFePO4 compatible charger). Lead-acid chargers may work but will only charge the battery to 80% capacity.
• Warranty: 11-year manufacturer defect warranty, offering peace of mind with long-lasting durability.
• Storage Capacity: 135Ah, providing consistent power throughout the discharge cycle. Unlike SLA batteries, it doesn’t have a dramatic drop in output as it discharges.
• Voltage: 12.8V, ideal for various applications, including automotive use.
• Engine Starting Power: Equivalent to 1,000 CCA of lead-acid engine starting power, making it suitable for automotive applications.
• Size: 11.6"L x 12.1"W x 12.8"H (295mm x 307mm x 325mm).
• Energy: 1,620Wh, providing ample power for a variety of uses.
• Weight: 42.92 lbs (19.47 kg), about 1/4 to 1/2 the weight of a traditional car battery, yet it floats.
• Lifespan: Up to 5,000 cycles at 80% capacity, compared to 500 cycles for typical SLA batteries.
• Operating Temperature: Ideal for rugged environments with operating temperatures ranging from -20°F to +150°F. Features internal heating for charging in cold weather.
• Discharge: 35A continuous discharge, with maximum pulse rates of 1,000A for 2 seconds and 900A for 5 seconds. A flat discharge voltage curve provides a 75% larger capacity compared to similar SLA batteries.
• Ultra-Fast Charging: The DL rapid charge technology allows for charging speeds of 60 minutes at 135A, with a recommended continuous charge rate of 60A for longer life.
• Active BMS Protection: Includes cell balancing, low voltage cutoff, high voltage cutoff, short circuit protection, and temperature protection for improved performance and longevity.
• Internal Heating for Winter Use: The internal heating element warms the cells to 32°F (0°C) when charging below freezing, enhancing lifespan and efficiency.
• Cold Temperature Charging Protection: The smart BMS prevents charging when temperatures are below 32°F (0°C) to protect the battery.
• Certifications: UN38 certified, UL1642 certified cells, tested to IEC62133 standards, and meets all US & international transport regulations (air, ground, train, and marine).
• Dual Purpose Use: Suitable for both deep cycle and starter battery applications, such as starting gasoline engines.