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10 Best Noco Genius Battery Chargers Review 2021

It is sensible to keep your batteries hooked up to a good quality NOCO Genius battery charger while they are not in use for long periods. Even good quality wet cell batteries lose charge gradulaly. If left uncharged for long periods, e.g., over winter, they may become sulfated and hard to regenerate

The range of Noco Genius battery chargers on the market for 2021 is surprisingly good, and it should be an easy job choosing the battery charger that meets your needs.

Editor’s Top 3 Picks of Genius Battery Changer

NOCO Genius GENM2
NOCO Genius GENM2 Battery Charger
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NOCO GENIUS1
NOCO GENIUS1 Battery Charger
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NOCO Genius GEN1
NOCO Genius GEN1 Battery Charger
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Rating
4.5
4.7
4.5
PriceNOCO Genius GENM2 priceNOCO GENIUS1 priceNOCO Genius GEN1 price
Voltage2 banks of 12V6V and 12VSingle 12V
Amperage1 A15 A2 A
Max. Charging Current8 A1 A10 A
Min. Charging CurrentTrickle chargeTrickle chargeTrickle charge
Charging timeModerateSlowModerate
Battery type
charging capability
Wet cell, AGM, Gel CellWet cell, AGM, Gel Cell, Lithium-ion
Wet cell, AGM, Gel Cell
Multiple connection optionsBattery clamps
and terminals
Alligator clamps + eyesEye terminals only
Information on
charging status
Charging and fully charged indicatorsLED indicators1 charging
status LED
Reverse polarity
protection
Overcharging protection
Water-resistant--
Reconditioning ability----
Can start engine------

10 Best Noco Genius Battery Chargers

1. NOCO Genius GENM2 8 Amp Battery Charger

 NOCO Genius GENM2
NOCO Genius GENM2 Battery Charger
4.5
NOCO Genius GENM2 is a good battery charger to use if you own small to moderate sized land based vehicles, PWCs and boats.

The NOCO Genius GENM2 can be used in exposed conditions on any type of smaller vehicle or boat battery. It is rugged and waterproof to 3m, which means it can safely be used anywhere outside and can survive rain, snow, and occasional dunking in water.

It is set up to charge and maintain two 12V battery banks at the same time. The charging status indicators are rudimentary and only show whether the charger is connected or not.

NOCO Genius GENM2 is a good choice for outside use as well as small to moderate sized batteries.
NOCO Genius GENM2 is a good battery charger to use anywhere outside as it is waterproof to 3 mins.

Pros

  • Charge 2 banks of 12V batteries at the same time
  • Handles battery capacity up to 120Ah
  • 5-year warranty
  • Fully waterproof rating to 3m
  • Spark proof
  • Automatic operation

Cons

  • Limited indicator display
  • Only eye terminals available
  • Small to moderate battery capacity handled only

Verdict

This is a good battery charger to use if you need on-board or on-site battery charging of batteries installed in small to moderate sized land based vehicles, PWCs and boats.

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2. NOCO GENIUS1 1A 6/12V Fully-Automatic Battery Charger

 NOCO GENIUS1
NOCO GENIUS1 Battery Charger
4.7
NOCO GENIUS1 is a wise choice for all types of 6V/12V lead-acid and some small capacity lithium-ion batteries.

This Noco Genius 1A fully automatic battery charger is a handy charger if you only have limited charging needs. It is fully automatic and can self-adjust to different ambient temperatures. Its main claim to fame is its reported ability to recharge very flat batteries and recharge or maintain some lithium-ion batteries of small capacity.

The main drawback is its limited amps for charging, so very slow if a battery is quite flat. Best used on smaller batteries while stored to keep their charge well maintained.

Pros

  • Can charge all types of lead-acid and some small capacity lithium-ion batteries
  • Charges both 6V and 12V batteries up to 30Ah only
  • Reputed to sense sulfation and recharge flat batteries of the only 1V
  • Fully automatic operation
  • Adjusts charging rate to ambient temperature

Cons

  • Limited indicator display restricted to the battery type and on/off status
  • Only charges small capacity batteries up to 30Ah, so restricted to small vehicles and motorcycles
  • Slow charging rate due to limited amperage

Verdict

Good, economically priced choice if your needs are limited. For larger batteries, it may be better to invest in a larger and more powerful NOCO Genius battery charger.

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3.  NOCO Genius GEN1 10 Amp Battery Charger

 NOCO Genius GEN1
NOCO Genius GEN1 Battery Charger
4.5
NOCO Genius GEN1 is a powerful and robust battery charger than can be used anywhere for RV, PWC, marine, SUV or truck batteries as long as there is a power supply.

The NOCO Genius GEN1 10A battery charger is a more powerful version of the GENM2. It can only charge a single battery bank of the total capacity of up to 230Ah. Its 10A charging rate puts it in the moderately high group of NOCO Genius battery chargers for charging rate.

The GEN1’s automatic operation and waterproof casing means that it can be safely left outside charging any recreational vehicle, PWC, marine, SUV or truck battery without having to remove the battery from its location.

The main drawback will be arranging for a mains power supply close enough to the location where the charger is to be deployed.

Pros

  • Automatic operation
  • Can charge 1 bank of 12V batteries at the same time
  • Handles battery capacity up to 230Ah
  • 5-year warranty
  • Fully waterproof rating to 3m
  • Spark proof

Cons

  • Limited indicator display
  • Only eye terminals available
  • Needs close by mains power or long extension lead if used outside

Verdict

This is a powerful and robust battery charger than can be used anywhere as long as there is a power supply. It is a more versatile and powerful version of the GENM2.

GENM2 is one of the best Noco Genius battery chargers for outside use.
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4. NOCO GENIUS10 6/12V 10 Amp Smart Charger

 NOCO GENIUS10
NOCO GENIUS10 Smart Battery Charger
4.5
NOCO GENIUS10 is powerful enough to handle the recharging or maintenance of just about any type of battery like cars, motorcycles, lawn mowers, ATVs, tractors, trucks, boats, classic cars, hot rods, and more.

The Genius10 10 amp smart charger is an upgraded and more powerful version of the Noco Genius G7200, which it has replaced and the smaller and less powerful Genius1 1A battery charger. The main advantage of this battery charger and the series it is part of that it can recharge very flat batteries or at least bring them back to some sort of life. They can also be used to maintain lithium-ion batteries of up to 230Ah.

The Genius10 battery charger is quite versatile with an easy to use a choice of output voltage from 6 to 12V. This means the battery charger can be used for anything from motorcycles to scooters, marine vessel batteries, autos, SUVs, RVs, and trucks.

NOCO GENIUS10 is one of the best Genius battery charger for its ultra-compact design and special features.
NOCO GENIUS10 is 120% more powerful than the version of the Noco Genius G7200.

Pros

  • Can charge 6V and 12V batteries with a flick of a switch
  • Can recharge or maintain some lithium-ion batteries
  • High amp charge can handle charging larger battery capacities
  • Can sense and respond to ambient temperature
  • Claimed to sense sulfation in old or flat batteries
  • Can recharge flat batteries down to 1V

Cons

  • Not waterproof so should only be used inside;
  • Limited indicator display only shows non-digital charge status.

Verdict

If your lifestyle seems to end up flattening your batteries, then this is the battery charger for you. It is powerful enough to handle the recharging or maintenance of just about any type of battery.

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5. NOCO Genius G3500 6V/12V 3.5 Amp Battery Charger

 NOCO Genius G3500
NOCO Genius G3500 Battery Charger
4.5
NOCO Genius G3500

The NOCO Genius G3500 battery charger is an earlier version of the more recently released Genius 5A battery charger. The specifications are similar to other 6V/12V battery chargers in the same category, with the main drawcard being the reported ability to repair flat batteries and maintain the charge of lithium-ion batteries.

Reviews of this battery charger indicate that there have been reliability issues, and perhaps this is why the battery charger has now been superseded by the Genius 5A charger.

NOCO Genius G3500 is one of the the safest and most advanced battery chargers on the market.
NOCO Genius G3500 is useful for repairing flat batteries and maintaining 6/12V lead-acid and lithium-ion batteries.

Pros

  • Charges 6V and 12V batteries
  • Can maintain some lithium-ion batteries as well as all lead-acid batteries
  • Has damage repair mode that can help to repair batteries that have become flat
  • Charges batteries of up to 120Ah capacity
  • Spark proof protection
  • 5-year warranty

Cons

  • Not very powerful as a battery charger with only 3.5A current rating
  • Superseded by the Noco Genius 5A model
  • Reports of poor internal soldering

Verdict

Given the current range of NOCO Genius battery chargers, it may be better to buy a newer model with similar features to the G3500.

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6. NOCO GENIUS2 2-Amp 6/12V Smart Battery Charger

 NOCO GENIUS2
NOCO GENIUS2 Battery Charger
4.6
NOCO GENIUS2 is an excellent choice for owners of smaller vehicles, and water based craft. Also, it is optimized to worry-free charge in any climate.

The NOCO Genius 2 is a smart and versatile battery charger that is useful for recharging and maintaining all types of small capacity batteries up to 40Ah. It is suitable for indoors using when an appliance or vehicle battery is stored for long periods. Its temperature sensor is reputed to allow the NOCO Genius2 battery charger to deliver the best charge rate under the conditions.

The big stand out with the Genius2 and other more powerful NOCO Genius battery chargers of the same basic design is that it can detect excess sulfation. For example, as might be expected in an undercharged lead-acid battery and revive it, so that the battery is suitable for use again. Independent reviews seem to suggest that the claim is valid.

NOCO Genius2 is useful for recharging and maintaining all types of small capacity batteries.
NOCO Genius 2 can detect excess sulfation in an undercharged lead-acid battery and revive it.

Pros

  • Lighter than replaced G1100 by nearly 50%
  • Can recharge 6V and 12V Lithium-ion batteries in addition to lead-acid batteries
  • Can revive flat batteries
  • Adjusts to ambient temperature to provide optimum charge
  • Can be used on a large range of devices because of 6V and 12V options

Cons

  • Simple indicator display only shows battery charge status
  • Low charging amps means slow charge rate
  • Limited range of connector types – only clamps

Verdict

The NOCO Genius2 battery charger is an excellent choice for owners of smaller vehicles, and water based craft. It can be used for other appliances that are fitted with small capacity batteries or are worried about flat batteries.

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7. NOCO GENIUS5 5-Amp 6/12V Smart Battery Charger

 NOCO GENIUS5
NOCO GENIUS5 Battery Charger
4.6
NOCO GENIUS5 is a versatile battery charger for charging batteries below 1V. It also provides all-season charging as it adjusts the charging rate according to ambient temperature.

The NOCO Genius5 is a bigger brother of the NOCO Genius2 with all the same features as the Genius2 but with a bigger punch. Its charging rate of 5A, rather than 2A, means that batteries of up to 120Ah can be charged and maintained.

Like the other NOCO battery chargers in the same series, its standout features are its ability to recharge weak batteries. They even include batteries that only deliver as little as 1V, as well as its ability to charge lithium-ion and lead-acid batteries alike.

The NOCO Genius5 is best used on batteries stored indoors. It can handle all small and medium-sized capacity batteries of both 6 and 12V.

NOCO GENIUS5 is a versatile battery charger for reviving flat batteries that only deliver as little as 1V.
NOCO GENIUS5 is best used on small and medium-sized capacity batteries of both 6 and 12V.

Pros

  • Much lighter and more powerful upgrade of the NOCO G3500
  • Can revive flat batteries down to 1V due to anti sulfation feature
  • Adjusts charging rate according to ambient temperature
  • Can recharge both 6V and 12 V batteries using simple press button option
  • Can recharge all types of batteries, including lead-acid and lithium-ion

Cons

  • Like other NOCO Genius battery chargers has limited display indicators
  • Not waterproof, so should only be used indoors away from moisture or bright sunlight
  • Limited connectors

Verdict

This is the right choice if you need a versatile battery charger and the need to revive flat batteries occasionally. The 5A charging rate allows medium-sized batteries to be maintained while stored out of their normal location.

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8.  NOCO Genius G4 6V/12V 4.4 Amp 4-Bank Battery Charger

 NOCO Genius G4
NOCO Genius G4 Battery Charger
4.4
NOCO Genius G4 is the best battery charger if you have multiple small capacity batteries you want maintaining at any one time.

The NOCO Genius G4 is unusual in that it can maintain 4 different batteries at any one time. The switches allow the users charge any combination of lead-acid or lithium-ion batteries together. 

The total charging current of 4.4A seems adequate, but if 4 batteries are being charged simultaneously, it restricts the capacity to 40Ah. The charging rate will be faster if only one battery is connected.

It also has a robust construction with a spark-proof safety feature and a simple, easy to use display.

NOCO Genius G4 is the best Genius battery charger which lets the user charge 4 batteries at one time.
NOCO GeniusG4 has a spark-proof safety feature and reverse polarity protection.

Pros

  • Provide charge to 4 batteries or battery banks at any one time
  • Handle lithium-ion batteries as well as lead-acid batteries
  • Recharge 6V and 12V batteries
  • Spark proof technology
  • 5-year warranty

Cons

  • Quite an expensive device if only used for a single battery
  • Limited charging rate restricts top battery capacity usage to 40Ah
  • Limited indicator displays

Verdict

Best battery charger if you have multiple small capacity batteries you want maintaining at any one time. There are good alternatives from the NOCO range if you only need a single battery charged.

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9. NOCO Genius G15000 12V/24V 15 Amp Battery Charger

 NOCO Genius G15000
NOCO Genius G15000 Battery Charger
4.3
NOCO Genius G15000 is designed to charge 12V/24V lead-acid and lithium-ion batteries. It is also used to maintaining marine, automotive, RV, lawn & garden, and deep-cycle batteries.

The NOCO Genius G15000 is a professional battery charger that can be used in a commercial setting with larger sized batteries. Its 15A charging rate allows for fast charging performance. It can handle both 12 and 24V batteries or banks of 12V batteries arranged in series to provide 24V power.

The repair mode on the NOCO GeniusG15000 allows the repair of weak batteries that have been left for too long without use.

Pros

  • Powerful 15A charging rate
  • Can recharge 12V and 24V batteries or battery banks
  • Can handle larger batteries up to 230Ah capacity
  • Has a repair mode to revive flat or weak batteries
  • Can charge 12V Lithium-ion batteries with an internal BMS
  • Can provide constant 5A DV supply to appliances when needed

Cons

  • Expensive machine if only have small to medium-sized batteries
  • Limited data display restricted to the state of battery charge
  • Only alligator clamp connectors are available

Verdict

The battery charger is to use if you have pressing battery charging needs. Or if you have a 24V system, and you need to maintain its optimum health.

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10. NOCO Genius G750 6V/12V 0.75 Amp Battery Charger

NOCO Genius G750
NOCO Genius G750 Battery Charger
4.3
NOCO Genius G750 is a suitable choice for those with small 6V/12V batteries that need maintenance when storing them during the winter.

The NOCO Genius G750 is the smallest and least powerful battery charger in the 6V/12V NOCO Genius series. It is an excellent device for indoor maintenance of small capacity batteries. It has most of the features of other NOCO Genius battery chargers but cannot revive flat batteries. This charger is best suited to maintain already healthy small batteries.

NOCO Genius G750 is one of the best battery charger for motorcycle, scooter, ATV and more.
NOCO Genius G750 is best suited to maintain already healthy 6V/12V small batteries.

Pros

  • Perfect choice for small battery owners
  • Trickle charge supplied to both and 12V batteries of up to 30Ah
  • Economical choice
  • Safety features like reverse polarity protection and spark-proof technology
  • 5-year warranty

Cons

  • Small amp charging rate limits the size of batteries that can be charged
  • Slow battery charging compared to others in series
  • Very limited display indication

Verdict

This battery charger is a good choice for those with small batteries that need maintenance when the battery is not needed for powering the machine installed in.

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Final thoughts

The NOCO genius range of battery chargers has something for everybody. There are totally waterproof models like the GENM2 and GEN1, which are ideal for outside use close to the batteries being maintained. Then many modern, well-designed battery chargers can handle lead-acid and lithium-ion 6V and 12V batteries. It is best to choose the battery charger that can easily handle the size of the battery you want maintaining as they vary from a minimal 0.75A with the G750 right through to 15A with the powerful G15000. Finally, there is the innovative 4 battery bank battery charger, the NOCO Genius G4.

Most reviewers seem to be happy with the performance of their NOCO Genius battery chargers, with a few commenting on the limited charging status displays common to all the NOCO Genius range.