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Battery Tender Junior 12V 750 mA 4-Stage Smart Charger

Was: $39.95
Sale Price: $29.45
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Product InformationStore Part Number: 021-0123


When you want to recharge small batteries fast, or maintain a charge on a battery in long-term storage, you need a 12 volt motorcycle trickle charger that’s lightweight and easy to use.

The 12V Battery Tender® Jr from Deltran fits the bill with its compact design that is fully automatic, and can even be used in the small spaces long-term storage can necessitate.

Each Deltran Battery Tender Junior we offer for sale ships with a quick-disconnect ring set and alligator clips. Keep your ATV or motorcyle battery charged and ready to go when you need it.


  • 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


* Flat Rate shipping is for the lower 48 states only.

Tech Specs

  • Dimensions (LxWxH): 3 5⁄16 x 2 5⁄16 x 1 7⁄8 in
  • Weight: 1.5 lb
  • Shipping Weight: 2.0 lb
  • DC Output Amps: 750 mA
  • Absorption Voltage: 14.4 V
  • AC Input Volts: 100 to 132 VAC
  • AC Input Amps: 0.36 Amps
  • Manufacturer: Deltran
  • AC Input Volts Freq.: 60 Hz
  • Float Voltage: 13.2 V
  • Maximum Power (+/- 3%) @ 25° C: 9 W
  • Charge Reset: Battery Voltage Threshold: 12.6
  • Working Temperature: -20° to 50° C
  • Output Banks: 1
  • Regulatory Approval: UL/CSA/CE/
  • Manufacturer Part #: BTjr12v021-0123
  • UPC: 734357000078
  • Made In: Philippines

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Reviews and Ratings

4.33 Average
5 Stars 2
4 Stars 0
3 Stars 1
2 Stars 0
1 Stars 0
Rated 4.33/5 Stars from 3 customer reviews.

Do you own the 021-0123? Please, tell us what you think about it. It helps us provide you with better products. Please note that it may take up to 72 hours for your review to appear.

Better when useing the battery clip's directly to the battery! work's fine.With plug in to wire's on auxillary unit of motorcycle.Start's out with solid green light THEN-Red light was constantly blinking.I gave up.Still useing my old unit.That say's my battery is fully charged.I feel it's a waste.On my wallet.Because my old battery tender even charged my car in March for 4 hrs. Of this yr.
***Note From***
The red light flashing indicates that the battery charger has AC power available and that the microprocessor is functioning properly. If the red light continues to flash, then either the battery voltage is too low (less than 3 volts) or the output connector is not connected correctly. Some SAE accessories are reversed polarity from Battery Tender products. Since it works with the alligator clips directly to the battery I would suggest testing you polarity of the Auxilary connector as it might not be compatible with the Battery Tender products.
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Written by on Dec 05, 2019. Verified Purchase — (6 of 7 customers found this review helpful
works Great.... I have a Battery Tender Junior 12V 750 amp mA and I also have a Battery Tender Junior 12V 800 amp mA. I use the 800 amp on my motorcycle and my 750 amp tender on my lawn mower. I'm wondering if either of the 2 can be used on either of the 2 batteries without making a difference to either application. Thank You L J
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Written by on Dec 10, 2019. — (2 of 3 customers found this review helpful
Works better than I expected.
Arrived in two days. My old NightHawk runs better now that its battery is fully charged before riding. The instructions are complete. Steps of operation are explained. I used it to top off a new Prius 12 V battery over night before installation. Mileage jumped.
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Written by on May 13, 2019. Verified Purchase — (0 of 1 customers found this review helpful

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