---
product_id: 764139
title: "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: "$99.13"
currency: USD
in_stock: true
reviews_count: 13
category: "Battery Tender"
url: https://www.desertcart.us/products/764139-junior-12v-750ma-charger-and-maintainer-automatic-12v-powersports-motorcycle
store_origin: US
region: United States of America
---

# 750mA smart charging current 12V output for versatile battery types 5-year warranty + lifetime support 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:** $99.13
**Availability:** ✅ In Stock

## Summary

> 🔌 Never get stranded—keep your ride ready with Battery Tender Junior!

## Quick Answers

- **What is this?** 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?** $99.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/764139-junior-12v-750ma-charger-and-maintainer-automatic-12v-powersports-motorcycle)

## 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

- • **Safety First:** Spark-proof circuitry and reverse polarity detection keep you and your battery safe every time.
- • **Compact & Portable:** Lightweight 1 lb design (3.3 x 1.3 x 2.4 inches) fits anywhere—garage, workshop, or on the go.
- • **Smart 4-Stage Charging:** Optimizes battery health with Initialization, Bulk, Absorption & Float modes—no overcharging, just peak power.
- • **Universal Compatibility:** Works flawlessly with all 12V lead-acid, AGM, flooded, and gel cell batteries—one charger for all your rides.
- • **Intelligent Maintenance Mode:** Automatically switches to float mode to maintain optimal voltage, preventing battery sulfation and extending lifespan.

## Overview

The Battery Tender Junior 12V, 750mA charger is a compact, smart battery maintainer designed for motorcycles, ATVs, and powersports vehicles. Featuring a 4-step charging process and automatic float mode, it safely charges and maintains all 12V lead-acid battery types, extending battery life and preventing sulfation. With spark-proof safety, reverse polarity protection, and a 5-year warranty backed by lifetime support, it’s the trusted choice for hassle-free battery care.

## Description

Buy Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123: Battery Chargers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Does what it is supposed to do - I have used Battery Tender chargers for many years, mostly on motorcycle batteries, with good results: quick starts, longer battery life, less maintenance. I have two lawn tractors now (a Sears 48" conventional type mower, and a commercial grade Exmark Lazer ZTR) that live in the garage, and normally aren't run much for the three-ish months of late fall-winter in Texas. If you live in colder climates, this charger is even more critical. Hooking it up is a breeze. If you can take a nut off a bolt, you know all you need to know to install the harness. Remove the positive (red) battery cable (this is a good time to clean up the cable end and battery terminal with a small wire brush). The Battery Tender cable has a loop type butt connector on it, so just slip the red harness cable end over the battery bolt, put the positive cable and nut back on and you're halfway home. Repeat on the negative (black) cable. That's it for the harness hookup. Simple, right? Tie wrap the harness in a convenient place where you can get to the connector end, as the harness stays with the battery full time. Kudos to the manufacturer for putting a cover on the connector end to keep it clean. The original Battery Tenders didn't have that! The connector to the charger is a flat two-conductor end that can only be connected one way, so no screw ups there. Even if you manage to do it wrong (wiring the harness backwards on the battery, for instance), it won't hurt the charger, it just won't charge. Connect the harness and charger together, and plug the charger in. There is a light that reflects charging state, and also lets you know if the battery is too dead to charge this way or if the harness is wired wrong. Once it gets back to steady green, you are charged. Now it will turn on and off as needed to keep your battery at optimal levels until next use. This maintenance charge also limits buildup of sulfates in the battery, the main reason unused batteries short out. Yes, it does cost about the price of a lawn tractor battery. In my experience, it doubles the life of the battery and lasts for years so it will pay for itself. But the real value is never coming out of the house ready to go and have a dead battery stop you in your tracks... waiting hours for the charger to get it back into shape, then seeing it not hold a charge because it is sulfated. I do not miss that frustration, and this is a pittance cost-wise to avoid it. A good product from a company that has been making them for long enough to know how. They also make bigger ones for larger batteries. I have owned both types, and they work similarly. It isn't fancy, and won't wow your friends, but it does exactly what it's supposed to do. I like that in a product.
Review: Excellent battery maintainer - 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.

## 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 A |
| Best Sellers Rank | #360 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 49,919 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 |
| Model Number | 021-0123 |
| Number of Items | 1 |
| 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 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

![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)

## Available Options

This product comes in different **Size** options.

## 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

### ⭐⭐⭐⭐⭐ Does what it is supposed to do
*by R***K on December 19, 2010*

I have used Battery Tender chargers for many years, mostly on motorcycle batteries, with good results: quick starts, longer battery life, less maintenance. I have two lawn tractors now (a Sears 48" conventional type mower, and a commercial grade Exmark Lazer ZTR) that live in the garage, and normally aren't run much for the three-ish months of late fall-winter in Texas. If you live in colder climates, this charger is even more critical. Hooking it up is a breeze. If you can take a nut off a bolt, you know all you need to know to install the harness. Remove the positive (red) battery cable (this is a good time to clean up the cable end and battery terminal with a small wire brush). The Battery Tender cable has a loop type butt connector on it, so just slip the red harness cable end over the battery bolt, put the positive cable and nut back on and you're halfway home. Repeat on the negative (black) cable. That's it for the harness hookup. Simple, right? Tie wrap the harness in a convenient place where you can get to the connector end, as the harness stays with the battery full time. Kudos to the manufacturer for putting a cover on the connector end to keep it clean. The original Battery Tenders didn't have that! The connector to the charger is a flat two-conductor end that can only be connected one way, so no screw ups there. Even if you manage to do it wrong (wiring the harness backwards on the battery, for instance), it won't hurt the charger, it just won't charge. Connect the harness and charger together, and plug the charger in. There is a light that reflects charging state, and also lets you know if the battery is too dead to charge this way or if the harness is wired wrong. Once it gets back to steady green, you are charged. Now it will turn on and off as needed to keep your battery at optimal levels until next use. This maintenance charge also limits buildup of sulfates in the battery, the main reason unused batteries short out. Yes, it does cost about the price of a lawn tractor battery. In my experience, it doubles the life of the battery and lasts for years so it will pay for itself. But the real value is never coming out of the house ready to go and have a dead battery stop you in your tracks... waiting hours for the charger to get it back into shape, then seeing it not hold a charge because it is sulfated. I do not miss that frustration, and this is a pittance cost-wise to avoid it. A good product from a company that has been making them for long enough to know how. They also make bigger ones for larger batteries. I have owned both types, and they work similarly. It isn't fancy, and won't wow your friends, but it does exactly what it's supposed to do. I like that in a product.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Wonderful battery tender! A MUST for any motorcycle/scooter owner.
*by T***E on November 27, 2014*

This little gem is worth it's weight in gold for anyone with a motorcycle or scooter. I use this tender for my honda metro. It has the option to use the clamps or the bolt on rings (interchangable). And, the very best part, it has a connector on the wiring so that you can keep the rings bolted on your battery and have your tender disconnected. This way, all you have to do to 'recharge' or boost your battery's charge is connect the two sections of the cord together, plug the tender in and VIOLA! your battery is being boosted without the hassle of removing battery covers, bolts, straps, etc. So easy to understand and use that a kid or a senior can do it the very first try! I highly recommend the purchase of this product for ANYone who owns a vehicle that they don't drive/start on a regular basis. My Metro has a tendency to have a drained battery if I don't start it at least once a month. For this reason, I purchased this tender and keep it plugged in when parked in my garage using the bolt on rings and taking advantage of the wire disconnect option. Although this is probably a bit overkill on charging, I honestly love having a fully charged battery when using my Metro (since my commute to work is 37 miles one way). This tender will NOT overcharge your battery and is perfectly fine to be used for extended periods. I would suggest it be used in an inside environment, although I'm not sure it states this on the product. I know I've been a bit detailed in this review, but I cannot say enough how much this is a time saver and life saver for anyone with a part-time vehicle (or, like me, a vehicle with a fickle battery). You will not be disappointed in this tender. Oh, and it has a LED light indicator with full explaination on the top so that you know when your tender is charging, your battery is fully charged, or if there is a connection/charge problem. The unit gets a bit warm, if you leave it plugged in for an extended time, but not hot enough to damage anything.

## 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
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-04*