---
product_id: 160808058
title: "Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH"
brand: "battery tender"
price: "€ 175.50"
currency: EUR
in_stock: true
reviews_count: 10
category: "Battery Tender"
url: https://www.desertcart.com.cy/products/160808058-battery-tender-4-amp-battery-charger-and-maintainer-automotive-switchable
store_origin: CY
region: Cyprus
---

# 4 Amp fast charging power Switchable 6V/12V for versatile battery types Reverse polarity & spark-proof safety Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH

**Brand:** battery tender
**Price:** € 175.50
**Availability:** ✅ In Stock

## Summary

> 🔌 Stay Powered, Stay Ahead — Never Let Your Battery Hold You Back!

## Quick Answers

- **What is this?** Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH by battery tender
- **How much does it cost?** € 175.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/160808058-battery-tender-4-amp-battery-charger-and-maintainer-automotive-switchable)

## 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

- • **Safe & Reliable:** Spark-proof connection and reverse polarity detection ensure worry-free, secure charging every time.
- • **Compact & Convenient:** Lightweight design with 11 feet of combined cord length fits easily in tight spaces and storage.
- • **Effortless Monitoring:** Two-color LED status indicator and ISM adaptive charging keep you informed and your battery optimized.
- • **Smart Charge & Maintain:** Automatically switches to float mode to keep your battery perfectly topped off without overcharging.
- • **Universal Compatibility:** Works seamlessly with lead-acid, AGM, gel, and lithium batteries at 6V or 12V with a simple switch.

## Overview

The Battery Tender 4 AMP Charger is a smart, automatic battery maintainer designed for 6V and 12V automotive batteries including lead-acid, AGM, gel, and lithium types. Featuring adaptive ISM technology, it delivers precise charging while preventing overcharge with a float mode. Compact and safe with spark-proof and reverse polarity protection, it’s perfect for cars, SUVs, and trucks, ensuring your battery stays ready whenever you are.

## Description

DescriptionThe fully automatic 4 Amp Power Tender is a top-of-the-line 12V or 6V switchable battery charger, perfect for automotive, motorcycle and marine repair and maintenance shops. Float / maintenance function maintains batteries at proper storage voltage without the damaging effects caused by trickled chargers. The integrated smart controller assures that your battery is charged safely and correctly at all times through our ISM (Infinite Sequential Monitoring). The ISM adapts to the battery’s needs hundreds of times per second to deliver the proper amount of charge. With reverse polarity protection and spark-proof operation, you can connect it and forget it!

Review: Great for campers - Worked great for keeping my camp trailer batteries charged all winter.
Review: Quality Battery Charger - We already own several Battery Tender products and when we needed one for our new Lithium Ion batteries, we knew we couldn't go wrong purchasing another Battery Tender charger. They build quality products that are easy to use to keep your batteries charged during the winter months.

## Features

- Stay Charged: The 4 amp car battery charger automotive provides a full charge to your machine's battery before automatically switching to float mode to maintain proper voltage levels for your battery without overcharging
- Connect and Forget: With a low maintenance design, our universal vehicle charger and maintainer is compact, lightweight, and easy to operate even in small storage space for your convenience. Features 11 total feet of combined reach including 6 ft. AC cord and 5 ft. DC output charging cord.
- Includes: 4 AMP battery charger, ring terminal and alligator clip combo cable, 5 year warranty, and lifetime customer service
- Monitor Power Levels: A solid state two-color LED light indicates the charging status and if the battery voltage drops too far under load, ISM adaptive charging will resume full charger output power. It is UL/CSA, CE and BC approved
- Safe and Secure: Spark-proof during lead connection and automatically detects reverse polarity to ensure a correct, locked-in connection before providing power
- Versatility: Compatible with lithium (LiFeP04), lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell), this charger works with 6 volt and 12 volt batteries with the push of a button

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07XMJDJX7 |
| Amperage | 4 Amps |
| Best Sellers Rank | #9,610 in Automotive ( See Top 100 in Automotive ) #65 in Battery Chargers |
| Brand | Battery Tender |
| Built-In Media | 12V 022-0209-BT-WH |
| Color | Black, Green |
| Connector Type Used on Cable | Alligator Clip and Ring Terminal |
| Current Rating | 4 Amps |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,774) |
| Global Trade Identification Number | 00734357220957 |
| Input Voltage | 120 Volts |
| Item Dimensions D x W x H | 1.87"D x 3.86"W x 8.3"H |
| Item Type Name | BATTERY_CHARGER |
| Item Weight | 2.4 Pounds |
| Manufacturer | 12V |
| Mfr Part Number | 022-0209-BT-WH |
| Model Number | 022-0209-BT-WH |
| Number of Ports | 1 |
| Output Voltage | 12 Volts (DC) |
| UPC | 734357220957 |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Battery Tender
- **Color:** Black, Green
- **Item Weight:** 2.4 Pounds
- **Output Voltage:** 12 Volts (DC)
- **Product Dimensions:** 1.87"D x 3.86"W x 8.3"H

## Images

![Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH - Image 1](https://m.media-amazon.com/images/I/51E7c9H7irL.jpg)
![Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH - Image 2](https://m.media-amazon.com/images/I/611UOenefyL.jpg)
![Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH - Image 3](https://m.media-amazon.com/images/I/71Od4AqWhiL.jpg)
![Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH - Image 4](https://m.media-amazon.com/images/I/71OzTCse00L.jpg)
![Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH - Image 5](https://m.media-amazon.com/images/I/81-KLtnI8GL.jpg)

## Questions & Answers

**Q: can i leave this on my harley all winter ?**
A: I use the Battery Tender® Plus 12V, 1.25 Amp on my motorcycle and the Battery Tender 6V/12V, 4 Amp Lead Acid & Lithium Selectable Battery Charger on my Car. I leave them on both vehicles for extended amounts of time during the cold months.

**Q: Can i leave this on while im out of town for a month?**
A: By all means.  This device is intended to be connected for continuous operation (except for driving of course - be careful to unhook before getting in your vehicle.  The design has a microprocessor that senses battery storage and will adjust the trickle to keep it at 100% (but not overcharging).  In fact, you should not disconnect it for any reason unless driving the vehicle.  I have a lawn tractor that only receives sporadic use.  My zero turn does most of the lawn mowing.  In any event, I keep both of these machines on a Deltran dual bank tender.  Their batteries are several years old which is unusual for a lawn mower.  (Typically, they fail shortly after the 12 Mo warranty.)  Leave it on to do its job.  Keep in mind that most vehicles (cars & trucks) draw a small amount of amperage while sitting - security system & clock.  The tender will compensate for this discharge.  Hope this helps.

**Q: Does this unit detect cold weather and charge to help prevent battery freezing ?**
A: It does not detect cold weather. If it is on the battery and maintaining the voltage, the battery is less likely to freeze.

**Q: will it charge lead acid batteries?**
A: Absolutely, all mine are of that type.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for campers
*by B***Y on March 3, 2026*

Worked great for keeping my camp trailer batteries charged all winter.

### ⭐⭐⭐⭐⭐ Quality Battery Charger
*by S***Y on January 4, 2026*

We already own several Battery Tender products and when we needed one for our new Lithium Ion batteries, we knew we couldn't go wrong purchasing another Battery Tender charger. They build quality products that are easy to use to keep your batteries charged during the winter months.

### ⭐⭐⭐⭐⭐ Dead car battery can be charged. I did it twice.
*by B***N on February 17, 2022*

Although the specifications for this product say that a fully dead battery cannot be charged, that this product just maintains charge. I did charge a dead car battery twice. It takes a special procedure, but no extra hardware. The reason that it does not work to simply plug in the Battery Tender, set battery type to AGM (normal car battery), set voltage to 12V, and then attach and charge when battery is dead is that the Batter Tender protects you from connecting the wrong way around to the battery by looking for some non-dead voltage from the battery, so that it can double check that you connected the black negative cable to the black negative battery terminal and the red positive battery cable to the red positive battery terminal. If the battery is dead, it cannot double check you and will pretend for a few minutes to charge the battery, followed by the upper-left blinking light of charging stopped. How to charge dead car battery using just Battery Tender: (1) Disconnect car battery positive red terminal from car electrical system by loosening the clamp and removing the cable. The Battery Tender for me failed to charge to 12V with the car connected, because the car electronics drew more power than the 12V Battery Tender electronics could supply in the case of low battery power. (2) With Battery Tender battery cables not connected yet, plug in the Battery Tender. (3a) Set battery type to AGM (normal car battery). (3b) Set voltage to 6V. This is key. Battery Tender does not double check correct polarity for 6V and will push current no matter what. (4) Attach negative black Battery Tender cable to negative black battery terminal. (5) Attach positive red Battery Tender cable to positive red battery terminal, which remember you have already disconnected from the car's electrical system. (6) Double check and triple check steps (4) and (5) to be absolutely sure you connected black to black and red to red. If you get this wrong, unspecified bad things will happen. This time the Batter Tender will not double check you. (7) The Battery Tender will indicate charging with solid upper right green light. (8) About 4 hours later the Battery Tender charging solid upper right green light will go off, and lower right solid green light will indicate full charge to 6V. Do not believe it. The battery voltage is 6V, but it is still lacking amps, and the slightest load will drop the voltage back down below the level that the 12V charging below will succeed. (9) After about 12 hours the Battery Tender will still indicate the same fully charged 6V, but by now enough additional power has been added to proceed confidently. (10) Disconnect the Batter Tender from the car battery. (11) Unplug the Batter Tender until the lights go out. (12) Plug the Battery Tender back in. (13a) Set battery type to AGM (normal car battery). (13b) Set voltage to 12V. This is key. Battery Tender having charged the battery to 6V will now be able to double check that when you connect it to the car battery that you are doing it the right way around. (14) Attach negative black Battery Tender cable to negative black battery terminal. (15) Attach positive red Battery Tender cable to positive red battery terminal, which remember you have already disconnected from the car electrical system. (16) Double check steps (4) and (5) to be sure you connected black to black and red to red, but now the Batter Tender will double check you. (17) About 4 hours later the Battery Tender charging solid upper right green light will go off, and lower right solid green light will indicate full charge to 12V. Do not believe it. The battery voltage is 12V, but it is still lacking amps, and the slightest load will drop the voltage back down below the level that car start will succeed. (18) After about 24-30 hours the Battery Tender will still indicate the same fully charged, but by now enough additional power has been added to proceed confidently. 12 hours is nowhere near enough. A day is a really long time, but remember that the Batter Tender was never intended to charge, just maintain, so it's output amperage is low. Although it will in time accomplish a battery charge, it will take a long time. Do not rush this step. (19) Disconnect the Batter Tender from the car battery. (20) Taking electrical safety care that you now have a live, powerful car battery, connect the car electrical system cable to the red positive terminal of the car battery. (21) I had to wait about 10-20 minutes before my car would respond. I think that some capacitors had to take time to charge before the car's electrical system was well again. (22) I first pushed the button for just the car's accessory mode to let all the systems reset themselves. The center console did some initial loading that it does not usually do. (23) Turn off the car, then start engine. All should be working for the moment, unless your radio thinks that with the power off for so long that it has been stolen and asks for an authorization code to work; your car dealer should be able to help you there; I did not experience this. (24) Drive the car for a half-hour or so to give the alternator time to top off the car battery.

## Frequently Bought Together

- Battery Tender 4 AMP Battery Charger and Maintainer - Automotive Switchable 12V or 6V Smart Automatic for Cars SUVs and Trucks - Lead Acid, AGM, Gel, & Lithium Battery Charger - 022-0209-BT-WH
- 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 25 Foot Extension SAE Cable - Designed for Use with Battery Tender Chargers - Quick Connect Plugs for Easy Connection to Motorcycle, Cars, ATVs and More - 081-0148-25

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-22*