# NOCO GENIUS10 10A 6V/12V Smart Battery Charger & Maintainer

Source: https://www.ranked10.co.uk/tech/best-car-battery-chargers/noco-genius10-10a-smart-charger
Ranked #3 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: £117.89 (checked on Amazon UK on 2026-09-17)
- Amazon rating: 4.5 from 1,674 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0828H7PNP?tag=ranked10-21

The NOCO GENIUS10 is a 10-amp smart charger, maintainer, trickle charger and desulfator, listed at £117.89 with 4.5 stars from 1,674 ratings. It takes third place in this guide, and it is the only unit here whose own specification table disagrees with its own headline: the title and the bullet points promise 6V and 12V charging, while the table's Output Voltage row reads "12 Volts (DC)" and says nothing about 6 volts.

The same table repeats the 10-amp figure in two separate rows (Current Rating and Amperage, both "10 Amps") and gives a Battery Charge Time of "1 Hours" for a 10-amp charger - a figure the listing never ties to a battery size. Everything on this page comes from the Amazon listing: the price, the rating and every specification row are as the seller published them, not the result of any testing by us.

## Specification

| Field | Value |
|---|---|
| Price | £117.89 |
| Rating | 4.5 out of 5, from 1,674 ratings |
| Charge current | 10 Amps (the Current Rating and Amperage rows both say 10 Amps) |
| Output voltage (as listed) | 12 Volts (DC) - the title and bullets say 6V and 12V |
| Input voltage | 240 Volts |
| Battery charge time (as listed) | 1 Hours |
| Battery types | 6V and 12V lead-acid (AGM, EFB, Gel, SLA, VRLA, start-stop) and lithium-ion (LiFePO4) |
| Box contents | GENIUS10UK charger, needle-nose battery clamps with integrated eyelet terminals, mounting bracket with velcro strap, two black truss-head screws, user guide, 3-year limited warranty |

## Questions people ask

**Does the NOCO GENIUS10 charge 6V batteries?**

The title and the bullet points describe it as a 6V and 12V charger, but the specification table lists Output Voltage as 12 Volts (DC) only. The listing gives both answers, so the two parts do not match.

**How much does the NOCO GENIUS10 cost?**

£117.89 as listed, with a rating of 4.5 out of 5 from 1,674 ratings.

**Can it charge a completely flat battery?**

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

**What comes in the box?**

The GENIUS10UK charger, needle-nose battery clamps with integrated eyelet terminals, a mounting bracket with velcro strap, two black truss-head screws, a user guide and a 3-year limited warranty.

**How long does it take to charge a battery?**

The listing's specification table gives a Battery Charge Time of 1 Hours. The table does not state which battery type or size that figure refers to.

**Which batteries is the NOCO GENIUS10 compatible with?**

The listing says 6V and 12V lead-acid batteries - AGM, EFB, Gel, SLA, VRLA and start-stop - plus lithium-ion, including flooded, maintenance-free, deep-cycle, marine and powersport batteries. It also lists cars, motorbikes, scooters, mopeds, lawnmowers, ATVs, tractors, trucks, caravans, campervans, vans and boats.