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Battery Tender Junior 12V .75A Charger - 021-0123

Item # : 36444
4.9124 Reviews
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Battery Tender Junior 12V .75A Charger - 021-0123

Item # 36444


Battery Tender® Junior 12V @ 0.75A

The Battery Tender® Junior is much more than a trickle charger. 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!


  • Perfect for all lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell).
  • Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode).
  • 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.
  • Spark proof.
  • Reverse polarity protected.
  • 12' output cord.
  • 5 year warranty

Manufacturer Part Number: 021-0123

Comparison Chart

ModelJuniorJunior 800 Genius G750Oximiser 9011 AMP
DifferentiatorClassic Best SellerLithium Compatibility6V & 12V CompatibilityDigital DisplayOEM Charger
Output12V, 0.75 Amps12V, 0.8 Amps6-12V, 0.75 Amps14.4V Max, 0.9 Amps12V, 1 Amp
Size3.3" x 2.3" x 1.4" 4” x 2” x 1.4”4.4" x 2.7" x 1.5"5" x 3.5" x 1.5"3.9" x 2.6" x 1.4" 
ChemistryLead Acid, AGM, GelLead Acid, AGM, Gel, LithiumLead Acid, AGM, Gel

Lead Acid, AGM, Gel

Lead Acid, AGM



Alligator Clamps & EyeletsAlligator Clamps & Eyelets Alligator Clamps with EyeletsAlligator clips, Eyelets, Wall bracketQuick Connect Adapter & Alligator Clips
Connection typeSAESAEProprietary, SAE availableSAESAE
Cord length12 feet12 feet5 feet4 + 3 feet12 feet
CertificationUL / CSA / BC / FCCBC / FCCUL / CSA / BC / FCC / NRTL NRTLU L/ cUL / FCC / BC
Warranty5 years5 years5 years2 years5 years




Rated 5 out of 5 by from Awesome charger Bought 2 of these a couple months ago. Using them for my cbr 1000rr and my John Deere lawn tractor. They are great. Hook them up and leave them. No worries about no starting in the spring. Highly recommended.
Date published: 2016-03-24
Rated 5 out of 5 by from Great little charger! I found Canada's Motorcycle to be an excellent choice for online purchasing. The product arrived exactly when it was supposed to and was exactly as pictured. The pricing was reasonable in comparison, and the Battery Tender Jr. works like a charm. I'm very pleased with the overall shopping experience and will definitely be ordering from Canada's Motorcycle .ca again.
Date published: 2016-03-24
Rated 5 out of 5 by from Works well I have it plugged in right now, it keeps my 3 batteries charged. The quick disconnect allows me to switch it to another battery quickly. The light that changes colour from red to green makes it very easy to assess the current state of the battery.
Date published: 2016-12-20
Rated 5 out of 5 by from Does the job, I've had this charger for a year or more now, and completely happy with it. Just plugged it in and left it,the battery is still as strong as the day I bought it. Very good product and fair price. Cheers.
Date published: 2016-11-04
Rated 5 out of 5 by from Excellent low cost product I have been using this since 2 months and it's perfect. Easy to install and very convenient as it's plug and play. It makes you save a lot of time. I recommand this product.
Date published: 2016-05-05
Rated 5 out of 5 by from First time to purchase .. Great price. Easy Site to use. Good communication. Fast shipping.. awesome first purchase.. will definitely buy again.
Date published: 2016-05-05
Rated 5 out of 5 by from Great value, works well thus far I've owned it from December to February (so a little premature to write a review), so far, it seems to be doing its job as intended. I'll check back in next season to see how well it's doing, but I'm guessing it's well worth the money.
Date published: 2016-02-08
Rated 5 out of 5 by from Does the job If it doesn't break too quickly, then it's a good buy; so far so good (after just a month though).
Date published: 2016-01-13
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Can you use the Junior Battery tender on a car. I have a Dodge Caravan. It is a wheelchair van that doesn't get used often.

Asked by: Lesq4
Yes, the Battery Tender Junior 12V .75A Charger - 021-0123 can be used on a car battery.
Answered by: MarieF9
Date published: 2019-10-02

Can I charge two batteries using one battery tender which is shown in this page?

Asked by: Henry
What's shown is you have two ways to connect to a battery, crocodile clips or pigtail, whichever more convenient to you. This tender does not provide a way to connect to two batteries at the same time.
Answered by: peter
Date published: 2017-03-30

I have an ultimate plug attached to by battery. Can I just plug it in, or do I have to change the plug attached to the battery?

Asked by: KGL19
This needs to be plugged either with the crocodile clamps or the quick attach harness.
Answered by: Katia
Date published: 2017-08-07

Hello,  Can this product be used with a lithium ion battery?  Thanks for any information! 

Asked by: Cb77
Looking at buying a 1.5 amp charger when the car gets put away for the winter. As I'm renting a space the owner is not really happy about plugging one in for the winter. I know there are a lot of variables, we're in Southern Ontario. What would you say is a fair price to pay him? December to end of April. Thanks for any help, I know they burn next to nothing, but I have to keep the person happy.
Answered by: Peter
Date published: 2016-11-21

Is the quick connect cable universal i.e. can the quick connect cable be used with every trickle charger on the market or is the quick connect specific to the charger?

Asked by: kgl19
The quick-connect cable comes with a standard SAE plug that can be used with most trickle chargers that use the same type of plug. It is however not recommended to use with other brands as it would void the warranty on any of the other chargers it is used on.
Answered by: Katia
Date published: 2017-08-08

Does it come with a 110v cord?

Asked by: jim807
Yes, the included wall plug-in is 110V.
Answered by: Katia
Date published: 2018-01-03

Well this maintain a car battery over winter months ?

Asked by: Todd
Yes, the Battery Tender Junior 12V .75A Charger - 021-0123 would be compatible with a 12V car battery.
Answered by: MarieF9
Date published: 2019-09-09

Does this come with everything as shown in the picture? Is this a new item in the manufactures packaging?

Asked by: Matt
Hi Matt, Most items on our website have stock pictures, which may not correctly reflect the exact version being ordered. That being said. This item is the correct picture, and everything included in the picture comes with the item. It is brand new in the original manufacturers packaging when you receive it. ~Danielle, Customer Service, Canada's Motorcycle
Answered by: Danielle CanadaMotorcycle
Date published: 2016-12-27
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