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Battery Tender Junior

Catalog Item # 46406
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The best way to eliminate sulfation-the number one cause of battery failure-is to prevent it.
The Battery Tender Junior will fully charge a battery and maintain it at the proper storage voltage without the damaging effects caused by most trickle chargers (especially sulfation). How? Battery Tender Junior is much more than a trickle charger-- it has a brain! Lightweight, compact and fully automatic, Battery Tender Junior is 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, including AGM and gel cell batteries.

Four-Step Charging Process

Step 1: Initialization-Monitor circuit verifies appropriate battery voltage levels and good electrical continuity between battery and charger DC output.

Step 2: Bulk Charge-Constant current at full power. Bulk charge ends at approximately 75% to 80% of full battery recharge.

Step 3: Absorption Charge-Constant voltage at absorption level conditions battery for optimum performance. Absorption charge ends when battery charging current drops below the optimum recharge threshold or the absorption timer expires.

Step 4: Float Charge-Constant voltage at float/maintenance level keeps battery fully charged and maintains high specific gravity. Full charge reset monitor protects battery against excessive appliance current draw while charging. Float charge continues indefinitely.


  • Automatically switches to float/maintenance voltage after fully charging the battery
  • Full charger output resumes if the battery voltage drops too far under load
  • Solid state two-color LED indicates charging stage
  • Spark-proof even when output leads touch
  • Short circuit protection
  • Reverse polarity protection-no charger or battery damage
  • 12' output cord for convenience
  • Mfr. 5 year warranty

Charge Times:

Motorcycle, Boat, ATV battery (10 - 20 Ah) 7-13 Hours
Truck Trolling Motor Battery (70 - 95 Ah) 47-63 Hours
RV (100 - 155 Ah) 67-103 Hours
For maintenance only.
RV (160 - 185 Ah) 107-123 Hours
For Maintenance only.
RV (190 - 215 Ah) 127-215 Hours
For maintenance only.
This item qualifies for Product Protection coverage! Protect Your Investment! Product Protection eliminates out-of-pocket expenses and protects against costly product repairs or replacement. We’ll cover 100% parts and labor for up to two years following the expiration of your manufacturer’s warranty. Warranty service is available at any Camping World SuperCenter.

Technical Specs

Tech Specs

Weight: 1.8 lbs.

Manufacturer: Deltran Usa Llc

Mfg Part #: 021-0123

Tech Notes:

  • 12V@750mA
  • 120-volt, 60 Hz
  • Output current 0.750 amps
  • Output voltage 12 volts
  • UL listed
  • 3.3"L x 2.3"W x 1.9"H

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Battery Tender Junior: Customer Reviews

Camper's Choice Rating

(5 Based on 3 Reviews)

Reviewed by 3 customers


Great little charger

0 out of 0 people found this review helpful.
August 31, 2012
I have been using this to maintain the battery on my new pop-up camper for a couple of months now. It is doing a great job. The battery charge level is right where it should be without losing electrolyte. I love the option to either use the clips or install the quick disconnect cable directly to the battery. I'm going to buy one of these for my father's birthday for his tractor battery.
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Battery Saver

0 out of 0 people found this review helpful.
May 08, 2012
This product is just what I was looking for it works geat and will extend the life of my battery. I use something simular on my Harly and was looking for this type of item to get for my camper battery. Its easy to hook up and you don't have to worry about it after that and when you pull your battery out of storage its fully charged. I would tell everyone that they should get this product
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Great Product

0 out of 0 people found this review helpful.
February 11, 2011
I had this hooked up to my waverunner for three years prior to selling it. It worked great with the battery starting right up after sitting all winter. The new owner took it with him.
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Q & A

Product Question & Answer

2 questions : 2 answers
Expand All
Will it work on 2 batteries hooked together?
1 answer(s)
Will this work on deep cycle batteries to keep charged over the winter? Thanks
1 answer(s)

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