# NOCO GENIUS2 2A 6V/12V Smart Battery Charger & Maintainer

Source: https://www.ranked10.co.uk/tech/best-car-battery-chargers/noco-genius2-smart-charger
Ranked #4 in "Best Car Battery Charger 2026: 10 Ranked, and Two Share a Model Number": https://www.ranked10.co.uk/tech/best-car-battery-chargers

- Price: £53.34 (checked on Amazon UK on 2026-09-17)
- Amazon rating: 4.5 from 2,293 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0828HGG2Q?tag=ranked10-21

The NOCO GENIUS2 is a 2-amp smart charger, maintainer and desulfator for 6-volt and 12-volt lead-acid and lithium batteries, priced at £53.34 and rated 4.5 out of 5 from 2,293 ratings. It takes number 4 in this guide. The listing positions it as an all-in-one: charger, battery maintainer, trickle charger and desulfator, with an integrated thermal sensor that adjusts the charge to the ambient temperature so it can be left connected indefinitely.

Two numbers on its own listing do not line up. The title and the bullets describe a 6V/12V unit, while the spec table gives 'Output Voltage: 12 Volts' and nothing else — so anyone buying this to charge a 6-volt battery is working from the headline, not the table. The same table claims a 'Battery Charge Time: 1 Hours' from a 2-amp output, which is a fast figure for a 2-amp charger on a car battery. For context, the two 25-amp chargers covered elsewhere in this guide are listed at £59.99, £6.65 more than this one. Everything on this page comes from the Amazon listing, not from testing of our own.

## Specification

| Field | Value |
|---|---|
| Price | £53.34 |
| Rating | 4.5 out of 5 from 2,293 ratings |
| Output current | 2 Amps (Current Rating and Amperage, as listed) |
| Output voltage | 12 Volts (as listed — the product title says 6V and 12V) |
| Battery charge time | 1 Hours (as listed) |
| Input voltage | 240 Volts |
| Histogram | 75 of 100 ratings are 5-star |
| Weight | 560 g |

## Questions people ask

**What batteries can the NOCO GENIUS2 charge?**

The listing says 6-volt and 12-volt lead-acid batteries (AGM, EFB, Gel, SLA, VRLA, Start-Stop) and lithium-ion (LiFePO4) batteries, including flooded, maintenance-free, deep-cycle, marine and powersport batteries.

**Can the NOCO GENIUS2 charge a completely flat battery?**

The listing says it charges batteries from as low as 1 volt, and that Force Mode lets you manually charge completely dead batteries down to zero volts.

**What is the charge current of the NOCO GENIUS2?**

2 amps. The spec table gives 'Current Rating: 2 Amps' and 'Amperage: 2 Amps'.

**Does the NOCO GENIUS2 output 6 volts as well as 12 volts?**

The title and bullets say 6V and 12V, but the spec table lists only 'Output Voltage: 12 Volts'. That is the contradiction to check before buying for a 6-volt battery.

**What is in the box with the NOCO GENIUS2?**

The GENIUS2UK 2A smart battery charger and maintainer, needle-nose battery clamps with integrated eyelet terminals, a mounting bracket with Velcro strap, two black truss-head screws, the user guide and a 3-year limited warranty, as listed.

**What does the NOCO GENIUS2 cost and how is it rated?**

It is listed at £53.34 and rated 4.5 out of 5 from 2,293 ratings, with 75 of the 100 ratings on the histogram at 5 stars.