Can I leave this connected to my motorcycle all winter without damaging the battery?

Yes! Battery Tender Junior switches to float/maintenance mode at full charge, offsetting self-discharge to keep at 100% without overcharging or damage. Unlike trickle chargers, it adjusts output to battery needs for safe long-term storage.

What size batteries can this charge? Is it good for small motorcycle batteries?

Battery Tender Junior 750mA is ideal for 3–30Ah batteries in motorcycles, ATVs, UTVs, scooters, PWCs, and snowmobiles. Safely charges small 3–5Ah batteries overnight and larger 14–20Ah motorcycle batteries in ~14–22 hrs.

Will the Battery Tender Junior work on my Harley-Davidson?

Yes, Battery Tender Junior works with all Harley-Davidson 12V models, including Sportster, Softail, Dyna, Touring, CVO, and Pan America. The 750mA output is ideal for Harley batteries, and the included harness allows easy plug-in charging.

What is the difference between this and a trickle charger?

A trickle charger delivers constant current and can overcharge a battery during storage. The Battery Tender Junior is a smart charger that automatically switches to float mode, charging only when needed for safe long-term maintenance.

Will this charge a completely dead battery?

Battery Tender Junior can recover most deeply discharged batteries using low-voltage recovery during startup. Batteries below 2V or left discharged too long may be permanently damaged. Red LED = charging; flashing red may indicate a bad battery.

Battery Tender 021 0123 12 Volt Battery Tender R Junior

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

AR$531995

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Argentina.

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Description

🔋 Keep your ride ready, effortlessly and smartly.

SMART CHARGING TECH - Automatically switches to float mode to maintain optimal battery health without overcharging.
COMPACT LIGHTWEIGHT - Sleek 621g design fits seamlessly in your garage or travel kit.
EFFORTLESS PLUG PLAY - Connect directly to your bike’s pig tail—no battery removal needed.
VISUAL CHARGE INDICATOR - Clear LED light lets you know exactly when your battery is fully charged—no guesswork.
TRUSTED AMERICAN QUALITY - Proudly made in the USA with a 4.8-star rating from over 47,000 users.

The Battery Tender 021-0123 Junior is a 12-volt smart battery charger designed for hassle-free maintenance charging. With automatic float mode, a compact form factor, and a simple plug-and-play setup, it ensures your vehicle battery stays healthy and fully charged. Made in the USA and highly rated by thousands, it’s the go-to charger for motorcycle and vehicle enthusiasts who demand reliability and ease.

Reviews

A**J

Just plug n play. Very smart charger.

I bought it for my HD Fat Bob. It is so easy to use that I need not remove battery from bike. I just have to connect to a pig tail connector of my bike with this charger and thats it. It charges and let us know when it is fully charged with light indicator. Now charging my bike is as easy as charging my mobile.

28.06.2021

L**K

Not working

Waste

29.11.2019

J**O

Excelente

Perfeito

20.08.2025

K**Y

Perfect for my motorcycle, high quality tender

I have had this tender for over 2 years now and of course it works great. The brand is great, it keeps my motorcycle battery alive during the cold season. Easy to use and great value.

1.01.2026

J**S

Muy buen artículo

Muy bien

5.02.2026

I**Y

Easy to use and fantastic

Easy to use and works fanastic

4.03.2026

A**D

Scam product

What great product i bought depending on its reviews but it just last for 3 seconds and then it blow up … cheap quality

21.08.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

AR$531995

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Argentina.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

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ASIN	B000CITK8S
Amperage	0.75 Amps
Brand	Battery Tender
Brand Name	Battery Tender
Colour	Black
Country of Origin	USA
Customer Reviews	4.8 out of 5 stars 47,834 Reviews
External Testing Certification	Não Aplicável
Global Trade Identification Number	00734357000078
Input Voltage	12 Volts
Manufacturer	BATTERY TENDER
Manufacturer Part Number	021-0123-CA
Model Number	021-0123
Number of Ports	1
Output Voltage	12 Volts

Battery Tender 021-0123 12-Volt Battery Tender(R) Junior

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Details

Description

Specifications

Reviews

Common Questions