# NOCO GENIUS5 6V/12V 5A smart battery charger ![NOCO GENIUS5 6V/12V 5A smart battery charger](https://baterias.com/20362-home_default/charger-noco-genius5eu.jpg) > NOCO GENIUS5 5 A smart charger for 6V and 12V lead-acid and lithium batteries up to 120 Ah. Fully automatic, with Force Mode to 0 V and an IP65 rated housing. **Category:** [Battery chargers](https://baterias.com/gb/battery-chargers) → [NOCO](https://baterias.com/gb/noco) - **Canonical URL**: https://baterias.com/gb/charger-noco-genius5eu - **Language**: en-GB - **Brand**: NOCO - **Reference**: BCOM-NOCO-GENIUS5EU - **EAN**: 1210000619266 - **MPN**: GENIUS5EU - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | NOCO | | Reference | GENIUS5 EU | | Model | NOCO GENIUS | | Voltage (V) | 6/12 V | | Largo | 117 mm | | Ancho | 74 mm | | Alto | 49 mm | | Peso | 0.68 kg | | EAN | 1210000619266 | | Load capacity | 120 Ah | | Current (A) | 5 | ## Quick description **NOCO GENIUS5EU 6V/12V 5A** is a smart charger that adjusts charging in several phases and keeps the battery ready when unused, protected against connection errors and overcharge. Highlights: 6V and 12V, lead-acid and lithium, 5 A charging current, for batteries up to 120 Ah. ### Why this charger? - **Smart charging** reads the battery and adjusts current in several stages - **Full protection** against overcharge, reverse polarity and short circuit - **Automatic maintenance** switches to float and keeps the battery topped up without overcharging 🔌 Voltage 6V/12V ⚡ Charging current 5 A 🔋 Recommended battery 120 Ah 💡 Power 75 W 🔌 Input 100-240 VAC, 50-60 Hz 🛡️ Protection IP65 📐 Dimensions 117×74×49 mm ⚖️ Weight 0.68 kg 🏷️ Model NOCO GENIUS ## Description ## NOCO GENIUS5 6V/12V 5A smart battery charger The NOCO GENIUS5 is a 5 A smart charger and maintainer for 6V and 12V lead-acid batteries (wet, gel, MF, EFB, AGM and calcium) and 12V lithium batteries with BMS. It charges batteries up to 120 Ah and maintains batteries of any size in cars, motorcycles, boats, motorhomes and garden machinery. It is fully automatic: it can stay connected 24/7 with no risk of overcharging and remembers the last mode used. It charges deeply discharged batteries from 1 V, and Force Mode lets you manually start charging batteries at 0 V. The built-in thermal sensor adjusts charging to the ambient temperature. It also offers a repair mode for old, sulphated or stratified batteries. ### Features - Fully automatic charger, maintainer and desulphator - 6V and 12V lead-acid batteries: wet, gel, MF, EFB, AGM and calcium - 12V lithium mode for batteries with BMS, including LiFePO4 - Charges discharged batteries from 1 V; Force Mode for batteries at 0 V - Thermal compensation prevents undercharging in the cold and overcharging in the heat - Can stay connected 24/7 without overcharging, with auto-memory of the last mode - Pulse charging that combats sulphation and acid stratification - Diagnostics for reverse polarity, bad battery and high voltage - Repair mode for old, sulphated or stratified batteries - Needle-nose clamps with detachable eyelet terminals for permanent connection ### 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 ## Frequently asked questions ### Which batteries can this charger charge? 6 V and 12 V batteries with a capacity of 120 Ah: conventional lead-acid, EFB, AGM and GEL. Check first that your battery voltage matches the charger. ### How long does it take to charge a battery? As a guide, the time from flat is the battery capacity (Ah) divided by the charger current (5 A), plus 20 %: a 100 Ah battery takes about 24 hours. If it is only half discharged, half that time. ### Can I leave it connected to the battery? Automatic chargers switch to maintenance when they finish and can be left connected. If maintenance charging is not listed in this model's specifications, disconnect it when charging is complete. ### Do I need to remove the battery to charge it? No, it is usually charged in place: with the engine and ignition off, connect the red clamp to the positive (+) and the black one to the negative (−) or to a metal part of the chassis, then plug in the charger. When finished, unplug it before removing the clamps. Do it in a ventilated place. ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-11-06*