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The NOCO GENIUS2 smart battery charger delivers a reliable 2 Amp charging current for both 6V and 12V lead-acid and lithium batteries. Engineered with advanced overcharge protection and temperature compensation, it ensures safe, efficient battery maintenance and desulfation. Its automatic trickle charging feature keeps your batteries in optimal condition without risk of damage, making it ideal for cars, motorcycles, lawn mowers, and more.

Sleek and modern high-resolution image showcasing the NOCO GENIUS2 charger’s robust design and automotive compatibility. Perfectly sized to illustrate the product's full form and appeal at a glance.

Image highlighting the charger’s trickle charging capability at 12 volts, demonstrating its efficiency in maintaining battery charge safely over long periods.

Detailed photo illustrating 6V battery charging mode, showcasing the versatility of the NOCO GENIUS2 charger for different battery types and vehicles.

Visual representation of multi-functional charging including motorcycles and automobiles, emphasizing the adaptability of the GENIUS2 for various power needs.

Showcase image of the GENIUS2 charger suitable for lithium, marine, and AGM batteries, illustrating its advanced technology designed for diverse battery chemistries.

Portable design shown in this image allows easy handling and storage, ideal for on-the-go charging and battery maintenance in multiple vehicle types.

Image emphasizing the desulfator feature and 12V maintenance charging, ensuring long battery life and restoration of battery efficiency over time.

Demonstration of compatibility with deep cycle batteries, trucks, and automotive applications, highlighting the GENIUS2’s wide usage range and powerful 2 Amp output.

Image portraying smart charging technology suitable for ATVs, lawn mowers, and other smaller vehicles, ensuring optimal battery health with consistent trickle charging.

Visual highlighting the float charger mode that protects your vehicle’s battery from overcharging by automatically adjusting the charge level.

Perfect image showing the 12V maintenance charging specifically for motorcycles, ensuring battery longevity even between rides.

Image demonstrating smart charging tailored for AGM and marine batteries, offering the precision and care needed for sensitive battery types in harsh environments.

Portable convenience captured here shows the GENIUS2 charger’s ease of use for scooters, ATVs, and other vehicles requiring efficient trickle charging.

Showcases smart pulse charging technology combined with lawn mower compatibility, underlining the versatility of the GENIUS2 charger in maintaining battery health.
![]() GENIUS2 | ![]() GENIUS1 | ![]() GENIUS5 | ![]() GENIUS10 | ![]() GENIUS2D | |
|---|---|---|---|---|---|
| Customer Reviews | 4.6 out of 5 stars 17,619 ratings | 4.4 out of 5 stars 58,488 ratings | 4.6 out of 5 stars 19,866 ratings | 4.5 out of 5 stars 19,786 ratings | 4.6 out of 5 stars 10,101 ratings |
| Price | $49.95 | $29.95 | $69.95 | $99.95 | $39.95 |
| Charging Current | 2 Amps | 1 Amp | 5 Amps | 10 Amps | 2 Amps |
| Battery Capacity | 40Ah | 30Ah | 120Ah | 230Ah | 40Ah |
| Output Power | 30W | 15W | 75W | 150W | 28W |
| 12V Repair Mode | ✘ | ✘ | ✔ | ✔ | ✘ |
| 12V Supply Mode | ✘ | ✘ | ✘ | ✔ | ✘ |
| 6V AGM Mode | ✘ | ✘ | ✘ | ✔ | ✘ |
After discovering my marine battery was completely drained right before a weekend trip, I bought the GENIUS2 out of desperation. To my surprise, Force Mode brought my dead battery back to life, and now I never worry about storage or climate—it's hassle-free battery maintenance I can trust.
The GENIUS2 impresses with its compact size and ability to handle various battery types, including reviving batteries that are deeply discharged—a real plus for anyone with multiple vehicles or equipment. The automatic reconditioning feature adds peace of mind for long-term battery health. However, charging can be slow, especially for larger batteries, which may not suit users seeking quick results. Overall, it's an excellent all-around charger for maintenance and reliability, so long as you’re not in a hurry.
Smart, Compact Charger That Revives Dead Batteries
Right out of the box, the GENIUS2 struck me with its compact and solid build—smaller than expected, but hefty enough to feel durable. The first feature I noticed was Force Mode, which allowed me to bring my boat’s AGM battery back from complete discharge—something my previous charger couldn’t handle. The automatic maintenance cycle is a huge plus; I can leave it connected for days without worrying about overcharging, making battery care almost effortless regardless of the weather.