# NOCO GENIUS5: smart charger 5A (6/12V)

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> NOCO GENIUS5: 5 A for 6V and 12V batteries up to 120 Ah, lead-acid or lithium, with Repair mode. Who it suits and when to pick the GENIUS10 or GENIUS2.

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

- **Canonical URL**: https://bateriasonline.es/en/noco-genius5-smart-charger-5a-6-12v
- **Language**: en
- **Brand**: NOCO
- **Reference**: BOL-NOCO-GENIUS5EU
- **EAN**: 1210000619266
- **MPN**: GENIUS5EU
- **Last updated**: 2026-11-10

## Quick description

The best-balanced GENIUS for cars: 5 A, up to 120 Ah, Repair mode and Lithium mode in a 0.68 kg charger.
- 5 A at 6V and 12V
- Up to 120 Ah
- Repair mode
- Half-flat 100 Ah: about 15 h
- IP65, 0.68 kg

## Description

## NOCO GENIUS5: smart charger 5A (6/12V)

For a car, van or motorhome with a battery of up to 120 Ah, the NOCO GENIUS5 is the model that covers the most cases. It brings a half-discharged 40 Ah battery back in about 6 h and adds the Repair mode missing on the GENIUS1 and GENIUS2.
With a small battery (motorbike, up to 40 Ah) it is more than you need and the GENIUS2 will do. Beyond 120 Ah, or if you want a 12V supply to keep memory settings alive, step up to the GENIUS10 (10 A, up to 230 Ah).
It works with 6V and 12V lead-acid batteries and 12V lithium with BMS.

### Features

- •   5 A charging current at 6V and 12V.
- •   Recommended for batteries up to 120 Ah.
- •   12V, AGM, Lithium, 6V, Repair and Force modes.
- •   Repair mode targets sulphated or stratified batteries.
- •   Charges from 1 V; Force Mode handles batteries at 0 V.
- •   Temperature-compensated charging.
- •   1.97 m DC cable and IP65 housing.

### Technical data

| Mains input voltage | 100-240 VAC, 50-60 Hz |
|---|---|
| Output power | 75 W max. |
| Charging current | 5 A (12 V) / 5 A (6 V) |
| Battery voltage | 6V and 12V |
| Battery chemistries | Lead-acid (wet, gel, MF, calcium, EFB, AGM) and 12V lithium with BMS (incl. LiFePO4) |
| Battery capacity | Up to 120 Ah; maintains all battery sizes |
| Charging modes | 12V, 12V AGM, 12V Lithium, 6V, Repair and Force |
| Low-voltage detection | 1 V (Force Mode: 0 V) |
| Back current drain | < 0.5 mA |
| Operating temperature | -20 °C to +40 °C |
| Storage temperature | -30 °C to +60 °C |
| Housing protection | IP65 |
| Cooling | Natural convection |
| DC cable length | approx. 1.97 m |
| Approx. charging time (50% depth of discharge) | 20 Ah: 3 h · 40 Ah: 6 h · 100 Ah: 15 h |
| Dimensions (L x W x H) | 117 x 74 x 49 mm |
| Weight | 0.68 kg |

### In the box

- •   GENIUS5 battery charger
- •   Battery clamps with integrated eyelet terminals
- •   2 self-tapping screws
- •   User guide and warranty

### Common questions

How long does a car battery take?
About 15 h for 100 Ah from half charge; about 6 h for 40 Ah.
Does it charge lithium batteries?
Yes, 12V with BMS, LiFePO4 included, in its Lithium mode.
GENIUS5 or GENIUS10?
Up to 120 Ah, the GENIUS5. Above that, or if you need a 12V supply mode, the GENIUS10.

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