---
product_id: 168179439
title: "GENIUS2D: 2A 12V Smart Onboard Battery Charger - Direct-Mount Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid Batteries"
brand: "noco"
price: "€ 87.55"
currency: EUR
in_stock: true
reviews_count: 8
category: "Noco"
url: https://www.desertcart.hr/products/168179439-genius2d-2a-12v-smart-onboard-battery-charger-direct-mount-automatic
store_origin: HR
region: Croatia
---

# 2A smart charging power Temp-compensated precision Direct-mount snap-fit install GENIUS2D: 2A 12V Smart Onboard Battery Charger - Direct-Mount Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid Batteries

**Brand:** noco
**Price:** € 87.55
**Availability:** ✅ In Stock

## Summary

> 🔋 Genius-level battery care that keeps you powered and worry-free!

## Quick Answers

- **What is this?** GENIUS2D: 2A 12V Smart Onboard Battery Charger - Direct-Mount Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid Batteries by noco
- **How much does it cost?** € 87.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/168179439-genius2d-2a-12v-smart-onboard-battery-charger-direct-mount-automatic)

## Best For

- noco enthusiasts

## Why This Product

- Trusted noco brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Direct-Mount Design:** Secure snap-fit bracket with self-tapping screws for hassle-free under-hood installation 🛠️
- • **Temperature Adaptive:** Integrated thermal sensor prevents over/undercharging by adjusting to ambient temps 🌡️
- • **Revives Dead Batteries:** Force Mode charges batteries down to zero volts, restoring even deeply discharged cells 🔋
- • **Smart 2A Charging Power:** Effortlessly charges & maintains 12V lead-acid batteries up to 40Ah with precision ⚡
- • **Maintenance-Free Peace of Mind:** Leave connected indefinitely with automatic desulfation and overcharge protection ✅

## Overview

The NOCO GENIUS2D is a compact, direct-mount 2A smart charger and maintainer for 12V lead-acid batteries, featuring temperature compensation, desulfation pulse charging, and Force Mode to revive dead batteries. Designed for seamless under-hood installation, it supports a wide range of battery types and vehicles, ensuring optimal battery health and longevity with safe, automatic maintenance backed by a 3-year warranty.

## Description

The GENIUS2D is the ultimate direct-mount onboard battery charger, designed for under-the-hood charging. It acts as a battery charger, maintainer, trickle charger, and desulfator, making it the perfect solution for 12-volt lead-acid batteries (up to 40 amp-hours), including AGM, gel, SLA, VRLA, flooded, maintenance-free, deep-cycle, marine, and RV applications. It is compatible with a vast array of vehicles, such as cars, automobiles, lawn mowers, ATVs, UTVs, tractors, trucks, SUVs, RVs, campers, trailers, boats, pickups, classic cars, and more, including automotive brands like BMW, Mercedes-Benz, Porsche, Bentley, Maserati, Lexus, Audi, Ford, Chevrolet, Corvette, Cadillac, Prius, Toyota, Subaru, Nissan as well as lawn and garden vehicles such as John Deere, Kubota, Toro and more. With its rugged snap-fit mounting bracket and truss-head self-tapping screws, installation is secure and effortless on most surfaces. The GENIUS2D can charge batteries as low as 1 volt and even offers Force Mode to manually charge completely dead batteries (as low as zero volts). Its advanced monitoring system keeps your battery fully charged without the risk of overcharging, while precision pulse charging reverses sulfation and acid stratification, restoring battery health and extending performance. The package includes a 2A onboard charger (120-240VAC), 24-inch AC and DC cables with eyelet terminals, a mounting bracket, screws, and is backed by a three-year warranty. Proudly designed in the USA, the GENIUS2D makes battery maintenance simple, reliable, and hassle-free.

Review: Compact and easy to install, does a great job - Smaller than I expected but much easier to install because of its size. The mounting strap has two holes to install the plastic snap-on back to the metal of the vehicle inside the engine compartment using two self-tapping screws (provided). There are two lugs on the snap-on back that accommodate a velcro strap (also provided) which ties down the charger in addition to the snap-on back that is latched to the charger. A well thought out system to ensure that the charger cannot shake loose when the vehicle is moving. In my case I have attached the charger to the wall above the front passenger tire well of my Silverado truck. That way, the charging leads can easily reach the battery although the power lead is too short to go anywhere near the front grill (Maybe 2-3 ft long). My GFI socket is on the side of my garage, about 45ft away from the engine compartment but it's easy to run a 50ft outside-rated cable (SJTW 12/3) to the charger power cable under the hood. With the temperatures around 31 to 42 degrees F right now and a new battery I am able to keep the battery fully charged in a truck that sometimes sits on an outside concrete pad for 2-3 weeks at a time. I am very pleased with this product. It gives me piece of mind that I will always be able to crank my engine whatever the weather. It will also help me to prolong the battery life. I now own two NOCO chargers, both are able to condition a battery as well as charge it. My other NOCO charger is a NOCO GENIUS 10A waterproof marine charger which can be used for several different battery types and does a great job for my lawn tractor and 12v shed battery for LED lights. It can handle lithium batteries also which works for my kayak. My neighbors call me when they need help with charging because they now understand the problems caused by sulphates which NOCO battery chargers can deal with. NOCO make great products. I have no hesitation recommending them. (NOTE: I gave this 5 stars but only four lit up. The first one stayed empty).
Review: Keeps Batteries Charged Eliminates Inconvenience And Aggravation - Few have the experience with batteries and charging systems that I have. I'm 68 years old and a retired professional mechanic who SPECIALIZED in batteries, starters, alternators and electrical systems. This is what I did for a living and managed a specialty battery store then my own shop that sold virtually every battery for vehicles, diagnosed and installed all related charging and starting system parts. The number one cause of alternator failure is a LOW BATTERY. The alternator is NOT A BATTERY CHARGER. It will not charge up a discharged low battery. Many many folks have heard to jump start a dead battery and let it run or drive the vehicle and it will charge up. I will NOT and puts only a small surface charge on the battery. Essentially the battery is 99% discharged. I have seven vehicles and only one doesn't have a maintainer on it. That vehicle is a non-computerized F-100 Ford. However, my Winnebago RV, 2023 ATV, Honda Sabre M/C, Honda Fit, Ford Ranger and my Dodge Caravan all have maintainers on them. Computerized vehicles that are not used daily that sit for any amount of time get low on charge. That's a fact. As a professional, I can tell you that if you want to do yourself a HUGE favor, use charger maintainers. I use the Noco Genius 1 on many things I own and this Genius 2 now just installed on my Honda Fit. Little is worse than going out to a low or dead batteries. Just as bad is starting a car with a low battery then driving it. It's very bad on the charging system and related components. These Noco products feature wide compatibility, are highly functional and are very simple to use. It really is a plug in and forget product that is highly useful. You just have to remember to disconnect it when you use the vehicle.

## Features

- MEET THE GENIUS2D — A direct-mount onboard battery charger for an under-the-hood battery charging. It's the all-in-one charging solution - battery charger, battery maintainer, trickle charger, plus desulfator.
- DO MORE WITH GENIUS — Designed for 12-volt lead-acid (AGM, Gel, SLA, VRLA) batteries, including flooded, maintenance-free, deep-cycle, marine and RV batteries.
- DIRECT MOUNT — Securely attaches near the battery using a durable snap-fit mounting bracket and installs easily into most surfaces with truss-head self-tapping screws for a hassle-free, reliable setup.
- ENJOY PRECISION CHARGING — An integrated thermal sensor dynamically adjusts the charge based on ambient temperature, preventing overcharging in hot weather and undercharging in cold, ensuring optimal battery performance.
- CHARGE DEAD BATTERIES — Charge batteries from as low as 1 volt, or use Force Mode to manually charge completely dead batteries down to zero volts. Perfect for recovering deeply discharged or neglected batteries.
- BEYOND MAINTENANCE — Keep your battery fully charged without worrying about overcharging. Our smart charger constantly monitors the battery, allowing you to leave it connected safely - indefinitely - for worry-free maintenance.
- RESTORE YOUR BATTERY — Precision pulse charging automatically detects and reverses battery sulfation and acid stratification, restoring your battery's health for improved performance and extended lifespan.
- WHAT'S IN THE BOX — Includes a 2A onboard charger, 24-inch AC cable, 24-inch DC cable with eyelet terminals, mounting bracket, screws, and a 3-year warranty. Proudly designed in the USA.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07W3QSMF9 |
| Battery Charge Time | 40 Hours |
| Best Sellers Rank | #209 in Automotive ( See Top 100 in Automotive ) #6 in Battery Chargers |
| Brand | NOCO |
| Built-In Media | 3-Year Limited Warranty, Battery Charger User Guide, GENIUS2D 2A Direct-Mount Smart Battery Charger and Battery Maintainer With Integrated Eyelet Terminals |
| Color | Black |
| Current Rating | 2 Amps |
| Customer Reviews | 4.6 out of 5 stars 10,346 Reviews |
| Global Trade Identification Number | 00046221180138 |
| Input Voltage | 120 Volts |
| Item Dimensions D x W x H | 3.47"D x 3.43"W x 6.5"H |
| Item Type Name | NOCO GENIUS2D, 2A Direct-Mount Onboard Car Battery Charger, 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for Marine, ATV, Truck and Deep Cycle Batteries |
| Item Weight | 0.73 Pounds |
| Manufacturer | NOCO |
| Mfr Part Number | GENIUS2D |
| Output Voltage | 12 Volts |
| Product Dimensions | 3.47"D x 3.43"W x 6.5"H |
| Specification Met | CEC, FCC, UL |
| UPC | 046221180138 |
| Unit Count | 1.0 Count |
| Warranty Description | 3-Year Limited Warranty |

## Product Details

- **Brand:** NOCO
- **Color:** Black
- **Item Weight:** 0.73 Pounds
- **Output Voltage:** 12 Volts
- **Product Dimensions:** 3.47"D x 3.43"W x 6.5"H

## Images

![GENIUS2D: 2A 12V Smart Onboard Battery Charger - Direct-Mount Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – for Lead-Acid Batteries - Image 1](https://m.media-amazon.com/images/I/81Q6Ag04oFL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is this water proof?**
A: The GENIUS2D is water resistant with a rating of IP65.

**Q: Does charger retain setting if power is lost then restored**
A: First I’m not sure.  But I’m 99% sure the loss of power has no effect at all. I base this on the fact that there’s no on or off button on the unit.(no settings) It only works or doesn’t work if it’s plugged in or unplugged. So my answer is their are no settings. So if you have power it works if you don’t it doesn’t. There is a cool feature it monitors it’s invioronent if it’s to hot it will not turn on.

**Q: will this work for motorcycle batteries?**
A: Yes; it works for my motorcycle, and the device is tiny enough to hide in a saddlebag.

**Q: My battery is in the trunk,,can I connect it to the jump points under the hood instead of directly to the battery in the trunk?**
A: Battery is in the trunk.  That must be an European vehicle.  Anyway, as long as you can securely tie the red and black eye hook of the charger to the jump points under the hood.  I have two cars with battery in the trunk.  What I did was one of vehicle I connect the NOCO charger 5-AMP, NOCO GENIUS GEN5X1 directly to the battery and on the other vehicle I use a portable NOCO 10-AMP, NOCO GENIUS10 charger to the jump points under the hood.  Good luck

## Customer Reviews

### ⭐⭐⭐⭐⭐ Compact and easy to install, does a great job
*by P***G on November 14, 2025*

Smaller than I expected but much easier to install because of its size. The mounting strap has two holes to install the plastic snap-on back to the metal of the vehicle inside the engine compartment using two self-tapping screws (provided). There are two lugs on the snap-on back that accommodate a velcro strap (also provided) which ties down the charger in addition to the snap-on back that is latched to the charger. A well thought out system to ensure that the charger cannot shake loose when the vehicle is moving. In my case I have attached the charger to the wall above the front passenger tire well of my Silverado truck. That way, the charging leads can easily reach the battery although the power lead is too short to go anywhere near the front grill (Maybe 2-3 ft long). My GFI socket is on the side of my garage, about 45ft away from the engine compartment but it's easy to run a 50ft outside-rated cable (SJTW 12/3) to the charger power cable under the hood. With the temperatures around 31 to 42 degrees F right now and a new battery I am able to keep the battery fully charged in a truck that sometimes sits on an outside concrete pad for 2-3 weeks at a time. I am very pleased with this product. It gives me piece of mind that I will always be able to crank my engine whatever the weather. It will also help me to prolong the battery life. I now own two NOCO chargers, both are able to condition a battery as well as charge it. My other NOCO charger is a NOCO GENIUS 10A waterproof marine charger which can be used for several different battery types and does a great job for my lawn tractor and 12v shed battery for LED lights. It can handle lithium batteries also which works for my kayak. My neighbors call me when they need help with charging because they now understand the problems caused by sulphates which NOCO battery chargers can deal with. NOCO make great products. I have no hesitation recommending them. (NOTE: I gave this 5 stars but only four lit up. The first one stayed empty).

### ⭐⭐⭐⭐⭐ Keeps Batteries Charged Eliminates Inconvenience And Aggravation
*by M***E on January 5, 2026*

Few have the experience with batteries and charging systems that I have. I'm 68 years old and a retired professional mechanic who SPECIALIZED in batteries, starters, alternators and electrical systems. This is what I did for a living and managed a specialty battery store then my own shop that sold virtually every battery for vehicles, diagnosed and installed all related charging and starting system parts. The number one cause of alternator failure is a LOW BATTERY. The alternator is NOT A BATTERY CHARGER. It will not charge up a discharged low battery. Many many folks have heard to jump start a dead battery and let it run or drive the vehicle and it will charge up. I will NOT and puts only a small surface charge on the battery. Essentially the battery is 99% discharged. I have seven vehicles and only one doesn't have a maintainer on it. That vehicle is a non-computerized F-100 Ford. However, my Winnebago RV, 2023 ATV, Honda Sabre M/C, Honda Fit, Ford Ranger and my Dodge Caravan all have maintainers on them. Computerized vehicles that are not used daily that sit for any amount of time get low on charge. That's a fact. As a professional, I can tell you that if you want to do yourself a HUGE favor, use charger maintainers. I use the Noco Genius 1 on many things I own and this Genius 2 now just installed on my Honda Fit. Little is worse than going out to a low or dead batteries. Just as bad is starting a car with a low battery then driving it. It's very bad on the charging system and related components. These Noco products feature wide compatibility, are highly functional and are very simple to use. It really is a plug in and forget product that is highly useful. You just have to remember to disconnect it when you use the vehicle.

### ⭐⭐⭐⭐⭐ Compact, Reliable, and Built to Last — The Perfect Onboard Charger for our Can-Am Spyder's
*by T***E on November 23, 2025*

The NOCO GENIUS2D is one of those products that instantly shows its quality the moment you open the box. Everything from the packaging to the finish on the charger feels solid and well-engineered. The components are thick, durable, and clearly designed for long-term, real-world use—far beyond the flimsy build you find in cheaper trickle chargers. I purchased two of these units and mounted them on both of our Can-Am Spyder's, and they’ve been flawless. Installation is refreshingly simple. The compact size makes it easy to work with, and the direct-mount design means no extra parts or awkward routing. The only challenge—and it’s a minor one—is finding the best permanent location inside the Spyder’s engine compartment. Space is tight, so a little creativity is required, but once mounted, the charger fits securely and stays out of the way. The wiring length is generous, and the connectors feel premium, locking into place with confidence. Performance is where this charger shines. It maintains the battery perfectly, keeping both bikes ready to ride through cold mornings and long periods of non-use. The smart charging logic is accurate and safe, eliminating the guesswork and babysitting that older chargers often require. For something that draws only 2 amps, the level of monitoring and regulation is impressive. It behaves like chargers that cost double or triple the price, especially those branded for “powersports” but offer no additional value. Because it’s fully automatic and designed to remain onboard full-time, it transforms battery maintenance into a simple plug-and-walk-away experience. For anyone who owns a Spyder, a motorcycle, an ATV, or even a small boat, this charger adds huge convenience for very little cost. Pros • High-quality components and durable construction • Compact, low-profile size ideal for onboard mounting • Simple, straightforward installation • Smart charging logic maintains batteries flawlessly • Excellent value compared to premium powersports chargers Cons • Finding the perfect mounting spot inside a Can-Am Spyder takes a little planning If you want a dependable, professional-grade onboard charger that keeps your Can-Am Spyder battery ready at all times, the NOCO GENIUS2D is an outstanding choice. After installing two of them, I wouldn’t use anything else.

## Frequently Bought Together

- NOCO GENIUS2D, 2A Direct-Mount Onboard Car Battery Charger, 12V Automotive Charger, Battery Maintainer, Trickle Charger, Float Charger and Desulfator for Marine, ATV, Truck and Deep Cycle Batteries
- NOCO GCP1 15A AC Port Plug, 125V Power Inlet Socket, and Waterproof Electrical Outlet Receptacle Box with 16-Inch Integrated Outdoor Extension Cord
- NOCO GCP2 15A AC Port Plug, 125V Power Inlet Socket, and Waterproof Electrical Outlet Receptacle Box with Dual 18-Inch Integrated Outdoor Extension Cords

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-07*