Product Comparison: NOCO Genius G750 vs Battery Tender Junior 021-0123

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General Specifications
Battery Tender
Junior 021-0123
About the Product
The G750 is a portable automatic battery charger and maintainer for both 6V and 12V lead-acid batteries. Designed for charging a Motorcycle, ATV, Snowmobile, Personal Watercraft, Lawn Mower and much more.
The Battery Tender® Junior offers much more than a trickle charger could offer. It has a brain. It's lightweight, compact, and fully automatic; very easy to use, especially in small spaces. It will keep your battery fully charged so that it is ready to go when you are!
Key Specs
Output Current
750 mA
750 mA
Output Voltage
6V, 12V
6V, 12V
Compatible Batteries
Wet, Gel, MF, EFB, AGM
AGM, Gel, Lead-acid, Flooded, MF
Recommended Capacity
30 Ah
30 Ah
Output Cord
10.4 feet
12 feet
What customers say about "Key Specs"
NOCO Genius G750 UltraSafe Smart Battery Charger
  • The battery has since fully recovered, and is now showing at 100%. I leave this charger on it all the time because the car has something wrong that will drain the battery if I don't, and the car doesn't get much use.
  • The G7200 is better suited to work with a wider range of batteries. It can work for 12Ah on up to probably something around the 130-140Ah range.
  • Overnight the battery made it to full charge. Claims that you can keep it on battery indefinitely.
  • Perfect charger/tender for someone with too many batteries! Very versatile, will charge any battery you have that powers your many 'toys'.
  • This charger / battery tender is fantastic. It is easy to use and has a safety built in to avoid overcharging and damaging your battery.
Battery Tender Junior 021-0123 Battery Charger
  • Just the Ticket for my lawn tractor, put the lugs on the battery terminals and charges like a dream. When I want to use the tractor I disconnect the connector and use the cap that comes with it in the end and start the tractor up.
  • Charging voltage is temperature compensated. It increases the charge voltage when it is cold outside and decreases the charge voltage when it is hot.
  • The Battery Tender works great on standard flooded wet-cell lead-acid batteries, as well as AGM (absorption glass mat) batteries.
  • Cables are short, so unless you’re arms length from the vehicle, you need the extension.
  • Impossible to connect to car batteries that do not have raised terminals.
Size & Weight
4.4 in.
3.41 in.
2.7 in.
2.39 in.
1.5 in.
1.9 in.
0.49 lbs.
1.8 lbs.
What customers say about "Size & Weight"
NOCO Genius G750 UltraSafe Smart Battery Charger
  • Overall, these are solid chargers if you have reasonable expectations and get the proper size for your application.
  • It's also very small, nicely designed and sells for a great price.
  • Since I need to care for the RV on my own, the light weight and ease of use of this charger are very important to me. Genius!
  • Light weight, well built, charges and maintains batteries as it should.
  • Easy to use light weight battery charger. Used it several times so far and it worked.
Battery Tender Junior 021-0123 Battery Charger
  • The new unit is so light weight it almost seems hollow inside.
  • Light weight and shutting down when fully charged.
  • These are small, light weight, and do their job. We use these on car , quad, mower, and motorcycle batteries when they sit in the winter.
  • The unit is pretty solid in build and has a solid weight to it.
Start Voltage
2 V
2 V
Charging Steps
1 - Analyze, 2 - Diagnose, 3 - Recovery, 4 - Initialize, 5 - Bulk, 6 - Absorption, 7 - Optimization, 8 - Maintenance
1 - Initialization, 2 - Bulk Charge, 3 - Absorption Mode, 4 - Float Mode
Back Current Drain
1 %
1 %
Ambient Temperature
32°F to +104°F
IP Protection
Reverse Polarity Protected
Spark Proof
Safely monitors battery actively with zero overcharge, Suitable for start-stop and CANbus vehicle systems, Advanced diagnostics indication for damaged batteries
Automatically switches to float / maintenance voltage after fully charging the battery., If the battery voltage drops too far under load, full charger output power resumes., Solid state two color LED indicates stage of charger, Safety timer: 80 Hrs
What customers say about "Features"
NOCO Genius G750 UltraSafe Smart Battery Charger
  • The "X-Connector" is so proprietary I've found I have to by two - three different adapters, daisy chaining them together if I want to get simple functionality.
  • The alligator clamps didn't seem like they had a very tight grip on the battery posts, but they didn't let go and provided enough contact for a proper charge.
  • The Noco was the only one that provided LED's to show the exact charge level. I LOVE this feature!
  • I think the Noco's "smart" features are credible. I've studied various rechargeable battery types and how to charge them since my kids started doing robotics several years ago.
  • I bought this after asking a few questions about the Desulfation feature. Total regret.
Battery Tender Junior 021-0123 Battery Charger
  • Easy to see lights that inform you of charge process.
  • Auto off feature sp you don't have to worry about ruining your battery.
  • Easy hookup once you have the ring terminal harness hooked up to your battery/batteries. no more fumbling around with alligator clips an having to open your hood to charge.
  • Spark free circuitry is nice (won't spark if alligator clips are accidentally touched together; note that a spark is still possible when connecting alligator clips to the battery).
  • No danger of attaching the wrong positive/negative -- it has reverse polarity protection
  • The charger unit doesn’t appear to be waterproof or encapsulated. I don’t recommend leaving it outdoors or year-round in an unheated garage.
  • Will not charge a fully dead battery.
Warranty / Certifications
Manufacturer Warranty
5 year(s)
5 year(s)
BC, UL, CSA, ETL listed
Other Information
37.95 $

Price History

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