NOCO GENIUS2X2 2-Bank Battery Charger
- 2 banks, 2A per bank, 4A total output
- 6V and 12V batteries, lead-acid and lithium (LiFePO4)
- Batteries up to 40 amp-hours
- 1 volt minimum in normal charging, Force Mode down to zero volts
- 10 hour listed battery charge time
- 120 volts listed input voltage
- Four AC cables, US, UK, EU and AU plugs
- 3-year limited warranty
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A sensible choice for maintaining two seasonal batteries from one outlet, with lithium support and a mode for deeply drained packs. Low output per bank makes it slow on large car batteries.
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ASIN: B08F37P7H3Model: GENIUS2X2Category: Car Battery Chargers
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Overview
NOCO built this two-bank unit to charge, maintain and desulfate a pair of batteries at once from a single wall outlet. Each bank runs its own clamp lead, and a thermal sensor adjusts the charge to the surrounding temperature.
Two independent banks let a motorcycle and a lawn mower battery share one charger through the off season, and lithium support covers newer packs. Output per bank is low, so a flat car battery takes a long time, and the battery size ceiling rules out big deep-cycle banks.
Who it's for
Owners of seasonal vehicles get one charger for two batteries parked side by side over winter. Drivers with a single daily car that needs a fast recovery charge should look at a higher output charger.
Pros and cons
- Charges two batteries at the same time
- Lead-acid and lithium support
- Force Mode for zero volt batteries
- Thermal sensor adjusts for temperature
- Only 2A per bank of output
- Rated for batteries up to 40 amp-hours
- Listing gives conflicting AC input ranges
- Slow on large car batteries
Performance notes
Charge speed is set by the small current each bank delivers, so battery size decides how long a full charge takes. The thermal sensor adjusts charging to ambient temperature, which matters for batteries stored in a cold garage or a hot shed. Pulse charging in desulfator mode works gradually on sulfation rather than giving a quick recovery.
Specifications
| Brand | Noco |
|---|---|
| Model | GENIUS2X2 |
| Dimensions & fit | |
| Item weight | 4.6 pounds |
| Item Dimensions D x W x H | 5.3 × 7 × 10.2 inches |
| Capacity & performance | |
| Max battery capacity | 40 amps |
| Power & efficiency | |
| Amperage | 4 amps |
| Battery Charge Time | 10 hours |
| Input Voltage | 120 volts |
| Battery types | Lead-acid and lithium (LiFePO4) |
| Warranty & support | |
| Warranty Description | 3 years |
| Other details | |
| Number of Ports | 2 |
| Connector Type Used on Cable | Battery Clamps And Eyelet Terminals |
| Specification Met | CEC, FCC, UL |
Frequently asked questions
Can the NOCO GENIUS2X2 stay connected to a stored battery all winter?
Yes. It is sold as a battery maintainer, trickle charger and float charger, and the listing describes smart monitoring for safe, indefinite connection during long-term storage.
Can the GENIUS2X2 recover a completely dead battery?
Force Mode lets you start a manual charge on a battery as low as zero volts. In normal mode it charges batteries from as low as 1 volt.
Is the NOCO GENIUS2X2 a jump starter?
No. It is a charger, maintainer and desulfator. Nothing in the listing describes jump starting, so it will not start a car with a dead battery on the spot.
Does the GENIUS2X2 work with lithium batteries?
Yes, it supports 6V and 12V lead-acid and lithium (LiFePO4) batteries.
Can I use the NOCO GENIUS2X2 outside the US?
The box includes Type-A, Type-C, Type-G and Type-I AC cables. The listing states the input as 120-240 VAC in one place and 120-220 VAC in another, so check your local voltage.