NOCO GENIUS2 2A Smart Battery Charger
- 2 A, 6 and 12 volt smart charger
- Lead-acid and LiFePO4 lithium batteries up to 40 Ah
- Force Mode for batteries down to zero volts
- Thermal sensor for temperature compensation
- 72 inch AC and 80 inch DC cables
- Mounting bracket with strap and screws included
- 1.2 pounds, 3.43 x 4.25 x 6.97 inches
- 3 year limited warranty
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact charger and maintainer for batteries up to the stated capacity, with a bracket, strap and screws in the box. Current is modest, so it favors upkeep and slow recovery.
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ASIN: B07W6B987FModel: GENIUS2Category: Car Battery Chargers
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Overview
NOCO packs a thermal sensor, pulse charging and Force Mode into this compact smart charger for six and twelve volt batteries.
A bracket and strap let it live on a wall or shelf near the vehicle, and the sensor adjusts the charge for temperature. The limitation is the capacity ceiling and a spec table that lists the input voltage oddly.
Who it's for
Owners with several small batteries, such as for a bike, mower or boat, can mount it near the storage spot and leave it working. Cars with large batteries should use a charger rated for bigger capacity.
Pros and cons
- Lead-acid and lithium supported
- Bracket, strap and screws included
- Thermal sensor for temperature compensation
- Force Mode for dead batteries
- Capped battery capacity
- Input voltage entry looks incorrect
- Single charging port
Performance notes
A built-in thermal sensor tunes the charging profile to the surrounding temperature, guarding against overcharge in heat and undercharge in cold. Pulse charging aims to reverse sulfation, and the monitoring system is described as safe for indefinite connection. Because the current is small, large batteries refill slowly.
Where it stands among car battery chargers
- #8 most-searched brand and model of the 14 car battery chargers lines we track (by search demand, not sales).
From the specs of the 23 car battery chargers we list; not a test result.
Specifications
| Brand | Noco |
|---|---|
| Model | GENIUS2 |
| Dimensions & fit | |
| Item weight | 1.2 pounds |
| Item Dimensions D x W x H | 3.43 x 4.25 x 6.97 inches |
| Capacity & performance | |
| Output Voltage | 6V and 12V |
| Battery capacity | Up to 40 amp-hours |
| Power & efficiency | |
| Amperage | 2 A |
| Battery Charge Time | 1E+1 hours (as listed) |
| Input Voltage | 12 volts (as listed; description gives 120-240VAC) |
| Compatibility & installation | |
| Compatible Devices | Cars, boats, motorcycles, ATVs, RVs, trucks, SUVs, scooters, lawn mowers, tractors and more |
| Warranty & support | |
| Warranty Description | 3 Year Limited |
| Other details | |
| Number of Ports | 1 |
| Connector Type Used on Cable | Battery clamps and eyelet terminals |
Closest rivals on specs
CTEK CS ONE Gen 2 Smart Battery Charger with WiFi- Amperage 2 vs 1.8 amps (+11%)
Battery Tender Junior 750mA Battery Charger- Amperage 2 vs 0.75 amps (+167%)
Foval Automatic Trickle Battery Charger 1000mA- Amperage 2 vs 1 amps (+100%)
- Item Weight 1.2 vs 0.66 pounds (+82%)
Frequently asked questions
How long can I leave the NOCO GENIUS2 connected?
The description says its monitoring system allows safe, indefinite connection. Follow the user guide for the hookup steps.
Does the NOCO GENIUS2 charge lithium batteries?
Yes. The title lists lithium (LiFePO4) as well as wet, gel and AGM lead-acid.
Is the NOCO GENIUS2 a jump starter?
No. It is a charger and maintainer, and no engine start function is listed.