# NOCO GENIUS2D: fixed-mount charger 2A (12V)

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> NOCO GENIUS2D: a 2 A charger to leave installed, for 12V lead-acid batteries up to 40 Ah only. When to choose it and when the portable GENIUS2 is smarter.

**Category:** [Battery chargers](https://bateriasonline.es/en/battery-chargers) → NOCO

- **Canonical URL**: https://bateriasonline.es/en/noco-genius2d-fixed-mount-charger-2a-12v
- **Language**: en
- **Brand**: NOCO
- **Reference**: BOL-NOCO-GENIUS2DEU
- **EAN**: 1210000618146
- **MPN**: GENIUS2DEU
- **Last updated**: 2026-11-10

## Quick description

A 2 A charger you screw down next to the battery and forget: 12V lead-acid up to 40 Ah, fully automatic, IP65 housing.
- Direct mount with bracket
- 2 A at 12V
- Lead-acid up to 40 Ah
- IP65, -20 to +60 °C
- Just 0.23 kg

## Description

## NOCO GENIUS2D: fixed-mount charger 2A (12V)

The NOCO GENIUS2D suits anyone who wants a charger permanently fitted to a vehicle or machine, with bracket and screws, and a 12V lead-acid battery of up to 40 Ah. There is no mode to choose: it starts as soon as battery and mains are connected.
It is not for you if your battery is lithium or 6V: the GENIUS2D only works with 12V lead-acid. In that case the portable GENIUS2 gives the same 2 A with 6V, AGM and Lithium modes.
Its AC and DC leads are 61 cm long, meant for mounting close to the battery.

### Features

- •   On-board charger with mounting bracket and 2 screws.
- •   Delivers 2 A to 12V batteries.
- •   Lead-acid only: wet, gel, MF, EFB, AGM and calcium.
- •   Fully automatic, no mode selection.
- •   Detects discharged batteries from 1 V.
- •   Can stay connected 24/7.
- •   61 cm leads; DC lead with eyelet terminals.
- •   LEDs for charge, temperature and polarity.

### Technical data

| Mains input voltage | 100-240 VAC, 50-60 Hz |
|---|---|
| Working voltage (AC) | 90-264 VAC, 50-60 Hz |
| Output power | 28 W max. |
| Efficiency | approx. 87% |
| Charging current | 2 A (12 V) |
| Battery voltage | 12 V |
| Battery chemistries | Lead-acid (wet, gel, MF, calcium, EFB, AGM) |
| Battery capacity | Up to 40 Ah; maintains all battery sizes |
| Charging modes | Automatic (no mode selection) |
| Low-voltage detection | 1 V |
| Back current drain | < 0.5 mA |
| Operating temperature | -20 °C to +60 °C |
| Housing protection | IP65 |
| Cooling | Natural convection |
| Cables | AC: 61 cm · DC: 61 cm with eyelet terminals |
| Mounting | Mounting bracket and 2 self-tapping screws |
| Approx. charging time (50% depth of discharge) | 8 Ah: 2 h · 12 Ah: 3 h · 24 Ah: 6 h · 40 Ah: 10 h |
| Dimensions (L x W x H) | 127 x 58 x 38 mm |
| Weight | 0.23 kg |

### In the box

- •   GENIUS2D battery charger
- •   Mounting bracket
- •   2 self-tapping screws
- •   User guide and warranty

### Common questions

Does it charge lithium batteries?
No. It is for 12V lead-acid only; for 12V lithium with BMS, take the GENIUS2.
Can it live outdoors?
It has an IP65 housing and operates from -20 °C to +60 °C, according to NOCO.
How long does it take?
About 6 h for a 24 Ah battery at half charge; about 10 h for 40 Ah.

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*bateriasonline.es — Batteries and accessories · 2026-11-11*