GENIUS2D  12V 2A Direct-Mount Battery Charger and Maintainer

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Engineered and tested to withstand rugged working environments, like high-heat engine compartments, shock, vibration, and even water exposure. The GENIUS2D is the ultimate mountable on-board battery charger and battery maintainer for any car, boat, truck, RV, or equipment, and is designed to be located in close proximity to the battery.

Introducing the next-generation of battery charging with the all-new maximum power density technology. This smart charger has insanely high performance and it is designed to be the most compact, lightweight and energy efficient charger on the market. Using advanced power conversion topologies as its foundation, the Genius 2D has significantly increased the power-to-space ratio utilizing power magnetics, consolidated components, and innovative thermal management techniques.

Finally a charger from start to finish that’s completely automatic. No special modes, no technical knowledge required. Genius will safely charge any battery. Detect damaged batteries and intuitively repair them. And actively monitor for long-term battery maintenance and extend battery life. This system allows for continuous operation without user intervention, and zero risk of overcharging your battery.

The GENIUS2D now features an integrated thermal sensor that automatically monitors and adjusts the charging cycle based on fluctuations of ambient temperature, enabling it to provide more precision charging in both hot and cold climates. Not only does it increase charge performance, but it extends battery life by limiting the impact of under-charging/over-charging caused by temperature changes. So now when you are charging in cold temperatures, the charging rates increase, and when in hotter temperatures, the rates will decrease. The result, better, more accurate, fully-charged batteries.

NOCO Genius 2D Simple Installation Drilling

Use a drill to secure the mounting bracket using self-tapping screws (included).

NOCO Genius 2D Simple Installation Attaching Strap

Loop the velcro mounting strap into the mounting bracket.

NOCO Genius 2D Simple Installation Mounting Charger

Clip the Genius 2D charger into the mounting bracket.

NOCO Genius 2D Simple Installation Strapping Charger

Fasten the Genius 2D charger using the velcro mounting strap.

Technical Specifications.

What's In The Box

  • GENIUS2D Battery Charger and Maintainer
  • Mounting Bracket with Strap
  • Self-Tapping Screws
  • User Guide

Operating Requirements

Line Voltage: 100V to 240V AC
Frequency: 50Hz to 60Hz
Operating Temperature: -4° to 104° F (-20° to 40° C)
Storage Temperature: -22° to 140° F (-30° to 60° C)
Relative Humidity: 0 to 95% Non-Condensing


Current: 2 Amps DC
Voltages: 12V DC
Chemistry: Lead-Acid
Types: Wet Cell (Flooded), Gel Cell, Calcium, AGM, Enhanced Flooded Battery or any other Maintenance-Free Battery
Capacity Range: Up to 40 Amp-Hours
Maintenance: All Battery Sizes


Consumption: 28 Watts (Max)
Efficiency: 87%


Short-Circuit: Yes
Open-Circuit: Yes
Overheating: Yes
Overcharge: Yes
Spark-Proof: Yes
Reverse Polarity: Yes

Size and Weight

Height: 3.00 Inches (76.2 mm)
Width: 3.50 Inches (89.0 mm)
Depth: 1.60 Inches (40.6 mm)
Weight: 0.50 lbs (0.23 kg)

Cord Management

DC Cable Length: 24 Inches (609mm)
DC Cable Size: 18 AWG
DC Fuse Size: 4 Amp MINI ® Blade Fuse
AC Cable Length: 24 Inches (609mm)
AC Cable Size: 18 AWG

IP Rating


Limited Warranty

3-Year Limited Warranty