--- product_id: 144341349 title: "021-0123 12-Volt Battery Tender(R) Junior" brand: "battery tender" price: "¥34433" currency: JPY in_stock: true category: "Battery Tender" url: https://www.desertcart.jp/products/144341349-021-0123-12-volt-battery-tender-r-junior store_origin: JP region: Japan --- # 0.75 Amps steady charge 12V optimized output Proudly made in USA 021-0123 12-Volt Battery Tender(R) Junior **Brand:** battery tender **Price:** ¥34433 **Availability:** ✅ In Stock ## Summary > 🔌 Keep your ride powered and ready—because your battery deserves the best! ## Quick Answers - **What is this?** 021-0123 12-Volt Battery Tender(R) Junior by battery tender - **How much does it cost?** ¥34433 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/144341349-021-0123-12-volt-battery-tender-r-junior) ## 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 - • **Highly Rated by Thousands:** Join over 48,000 satisfied users who trust this charger for their vehicle maintenance. - • **Reliable 0.75 Amp Charging:** Delivers a consistent, safe charge to keep your battery healthy and ready. - • **Perfect 12-Volt Compatibility:** Engineered specifically for 12V batteries, ensuring optimal performance every time. - • **Compact & User-Friendly Design:** Sleek black finish with a single-port setup for hassle-free, space-saving use. - • **Trusted American Craftsmanship:** Manufactured in the USA, combining quality and durability you can count on. ## Overview The Battery Tender 021-0123 Junior is a compact, 12-volt battery charger delivering a steady 0.75 amps charge. Made in the USA and highly rated by over 48,000 users, it offers reliable, safe, and efficient battery maintenance for vehicles, ensuring your battery stays in peak condition with minimal effort. ## Description BATTERY TENDER 021-0123 12-Volt Battery Tender(R) Junior ## Features - Best Quality - Battery Tender ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000CITK8S | | Amperage | 0.75 Amps | | Brand Name | Battery Tender | | Colour | Black | | Country of Origin | USA | | Customer Reviews | 4.8 4.8 out of 5 stars (48,118) | | External Testing Certification | Não Aplicável | | Global Trade Identification Number | 00734357000078 | | Input Voltage | 12 Volts | | Manufacturer | BATTERY TENDER | | Manufacturer Part Number | 021-0123 | | Model Number | 021-0123 | | Number of Ports | 1 | | Output Voltage | 12 Volts | ## Product Details - **Amperage:** 0.75 Amps - **Brand:** Battery Tender - **Colour:** Black - **Input Voltage:** 12 Volts - **Output Voltage:** 12 Volts ## Images ![021-0123 12-Volt Battery Tender(R) Junior - Image 1](https://m.media-amazon.com/images/I/61nddgtbkaL.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. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/144341349-021-0123-12-volt-battery-tender-r-junior](https://www.desertcart.jp/products/144341349-021-0123-12-volt-battery-tender-r-junior) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-16*