---
product_id: 764139
title: "Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123"
brand: "battery tender"
price: "2366722₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Battery Tender"
url: https://www.desertcart.vn/products/764139-battery-tender-junior-12v-750ma-charger-and-maintainer-automatic-12v
store_origin: VN
region: Vietnam
---

# 12V output for universal compatibility 750mA smart charging current 4-step automatic charge & float mode Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123

**Brand:** battery tender
**Price:** 2366722₫
**Availability:** ✅ In Stock

## Summary

> 🔌 Keep your ride ready, never stranded!

## Quick Answers

- **What is this?** Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123 by battery tender
- **How much does it cost?** 2366722₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/764139-battery-tender-junior-12v-750ma-charger-and-maintainer-automatic-12v)

## Best For

- battery tender enthusiasts

## Why This Product

- Trusted battery tender brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Portable:** Lightweight (1 lb) and small footprint (2.9" x 2.15" x 4.4") fits easily in any garage or travel kit.
- • **Safety First Design:** Spark-proof circuitry and reverse polarity detection ensure safe, hassle-free connections every time.
- • **Smart Power Management:** Automatically switches to float mode to maintain optimal battery voltage without overcharging.
- • **Universal Compatibility:** Works seamlessly with all 12V lead-acid, AGM, flooded, and gel cell batteries for versatile use.
- • **Long-Term Battery Health:** Extends battery life with a complete 4-step charging program, perfect for seasonal storage and daily readiness.

## Overview

The Battery Tender Junior 12V, 750mA Charger and Maintainer is a compact, smart charger designed for powersports vehicles like motorcycles and ATVs. It features a 4-step automatic charging process that optimizes battery health by preventing overcharge and maintaining proper voltage during long-term storage. Compatible with all 12V lead-acid battery types, it includes safety features like spark-proof circuitry and reverse polarity detection, backed by a 5-year warranty and lifetime support.

## Description

Product description Battery Chemistry Compatibility Works with 12V sealed, flooded, AGM, and GEL batteries. No manual selection required. Battery Chemistry Compatibility Works with 12V sealed, flooded, AGM, and GEL batteries. No manual selection required. Charging Indicator Lights Quickly see the status of the battery charging. Flashing red: not charging. Solid red: battery charging. Flashing green: battery greater than 80% charged. Solid green: monitoring charged battery. Charging Indicator Lights Quickly see the status of the battery charging. Flashing red: not charging. Solid red: battery charging. Flashing green: battery greater than 80% charged. Solid green: monitoring charged battery. ISM—Infinite Sequential Monitoring A proprietary technology that continuously monitors and adapts to battery conditions in real time. ISM—Infinite Sequential Monitoring A proprietary technology that continuously monitors and adapts to battery conditions in real time. Two-In-One Accessory Cable Connect the charger using alligator clips, or remove the clips with a screwdriver and attach ring terminals directly to the battery posts. Leave the cable installed for easy future charging. Two-In-One Accessory Cable Connect the charger using alligator clips, or remove the clips with a screwdriver and attach ring terminals directly to the battery posts. Leave the cable installed for easy future charging. Battery Tender Powersports Battery Chargers Junior 750mA Junior 800mA Waterproof Junior 1 AMP Lithium Plus 1.25 AMP 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. 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. 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. 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. 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. 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.

Review: 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.
Review: A quality product for a fair price. - HIgh end quality product. Works really well, and saved me from getting stranded because of a dead battery. My OEM battery was about 4 1/2 years old and after using this tender I saw that my battery wasn't holding a charge and was weak. I don't know about others, but trying to start my car and finding out the battery has permanently expired is not a happy experience. I also plan to use it the next time I go on vacation and leave my car in garage. Batteries are always losing their charge, even when there is no drain on them.

## Features

- Stay Charged: Battery Tender battery chargers and maintainers provide a full charge to your powersport vehicle’s battery before switching to float mode to maintain proper voltage levels for safe, long-term storage
- Extend Battery Life: Compatible with all 12V lead-acid, flooded, AGM, and gel cell batteries. Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode) allows for optimization of battery power, without overcharging or battery damage. Smarter than a trickle charger.
- Includes: 12V, 750mA battery charger and battery maintainer with 12-foot output cord, fused-ring terminal harness for hard-to-reach batteries and alligator clip accessory cables, 5-year warranty, and lifetime customer support
- Simple & Safe: Low maintenance, easy-to-use, universal battery charger is just 3.3 x 1.3 x 2.4 inches, 1 lb (charger only). Spark-proof circuitry ensures no-spark connections, and automatic reversed hook-up detection verifies correct connection
- Monitor Power Levels: Two-color charge status LED light indicates the state of the charge and if the battery voltage drops too far under load, adaptive charging will resume full charger output power. Automatic charge cycle functionality switches to float mode after fully charging the battery

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000CITK8S |
| Amperage | 0.75 Amps |
| Best Sellers Rank | #478 in Automotive ( See Top 100 in Automotive ) #5 in Battery Chargers |
| Brand | Battery Tender |
| Built-In Media | Battery Tender 021-0123 |
| Color | Black/Green |
| Connector Type Used on Cable | Alligator Clips, Ring Terminals |
| Current Rating | 750 Milliamps |
| Customer Reviews | 4.8 out of 5 stars 49,692 Reviews |
| External Testing Certification | Não Aplicável |
| Global Trade Identification Number | 00734357000078 |
| Input Voltage | 12 Volts |
| Item Dimensions D x W x H | 2.9"D x 2.15"W x 4.4"H |
| Item Type Name | BATTERY_CHARGER |
| Manufacturer | Deltran |
| Mfr Part Number | 021-0123-CA |
| Model Number | 021-0123 |
| Number of Ports | 1 |
| Output Voltage | 12 Volts |
| Product Dimensions | 2.9"D x 2.15"W x 4.4"H |
| Specification Met | CSA, ETL, FCC |
| Unit Count | 1.00 Count |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Battery Tender
- **Color:** Black/Green
- **Output Voltage:** 12 Volts
- **Product Dimensions:** 2.9"D x 2.15"W x 4.4"H
- **Specification Met:** CSA, ETL, FCC

## Images

![Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123 - Image 1](https://m.media-amazon.com/images/I/61nddgtbkaL.jpg)
![Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123 - Image 2](https://m.media-amazon.com/images/I/61WXhgq+0EL.jpg)
![Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123 - Image 3](https://m.media-amazon.com/images/I/817gTJl3QIL.jpg)
![Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123 - Image 4](https://m.media-amazon.com/images/I/61nthcrLppL.jpg)
![Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123 - Image 5](https://m.media-amazon.com/images/I/71fUsIoOASL.jpg)

## Questions & Answers

**Q: Can I leave this connected to my motorcycle all winter without damaging the battery?**
A: 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.

**Q: What size batteries can this charge? Is it good for small motorcycle batteries?**
A: 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.

**Q: Will the Battery Tender Junior work on my Harley-Davidson?**
A: 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.

**Q: What is the difference between this and a trickle charger?**
A: 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.

**Q: Will this charge a completely dead battery?**
A: 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect for my motorcycle, high quality tender
*by K***Y on January 1, 2026*

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.

### ⭐⭐⭐⭐⭐ A quality product for a fair price.
*by J***K on March 12, 2026*

HIgh end quality product. Works really well, and saved me from getting stranded because of a dead battery. My OEM battery was about 4 1/2 years old and after using this tender I saw that my battery wasn't holding a charge and was weak. I don't know about others, but trying to start my car and finding out the battery has permanently expired is not a happy experience. I also plan to use it the next time I go on vacation and leave my car in garage. Batteries are always losing their charge, even when there is no drain on them.

### ⭐⭐⭐⭐⭐ Excellent battery maintainer
*by T***A on May 6, 2026*

I bought this one as a gift so I can't open it. I have the exact same one hooked to my car battery that's in storage. The battery is going on eight years. Considering I would have bought another battery by now, it's already paid for itself. I've never had a problem with it and it works flawlessly, just hook it up and plug it in. This is one battery tender I highly recommend.

## Frequently Bought Together

- Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123
- Battery Tender Ring Terminal Harness Accessory Cable - 18 inch Cord Adapter with SAE Quick Disconnect - Easy Quick Convenient for Motorcycles, Cars, ATVs and More - 081-0069-6
- Battery Tender Quick Disconnect USB Charger Adapter - Easily Charge Mobile Devices with 12V Vehicle Battery on The Go - Perfect for Camping Our Outdoor Adventures - 081-0158

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-19*