XTAR X4 Universal 4-Bay Battery Charger Instruction Manual

1. Introduction

The XTAR X4 is a universal 4-bay battery charger designed for various rechargeable battery types, including Li-ion, IMR, INR, ICR, Ni-MH, and Ni-Cd. It features dual input ports (AC and Micro USB), a 5V USB output function, and an intelligent LCD screen for monitoring charging status. This manual provides essential information for safe and efficient operation of your XTAR X4 charger.

Image 1.1: The XTAR X4 Universal 4-Bay Battery Charger, showing the main unit and included power cord.

2. Safety Information

Please read and understand all safety instructions before using the charger. Failure to follow these instructions may result in electric shock, fire, or serious injury.

• Do not disassemble or modify the charger.
• Use the charger only with compatible rechargeable batteries. Attempting to charge non-rechargeable batteries may cause explosion or leakage.
• Keep the charger away from water, moisture, and high temperatures.
• Ensure proper polarity when inserting batteries. Incorrect insertion can damage the charger and batteries.
• Do not leave the charger unattended during operation.
• Keep out of reach of children.
• The charger is designed for indoor use only.
• Unplug the charger from the power source when not in use.

Image 2.1: The XTAR X4 charger highlighting its integrated safety features, including protection against overcharge, short circuit, reverse polarity, and overcurrent.

3. Product Overview

3.1 Features

• 4-Bay Fast Charging: Capable of charging batteries with 2A*2/1A*4/0.5A*4 current.
• Dual Input Ports: Supports both AC input and Micro USB input for versatile power options.
• USB Output Function: Provides 5V USB output to charge external devices like phones, cameras, and tablets.
• Intelligent LCD Screen: Displays battery power percentage, voltage, current, and charging capacity.
• Comprehensive Safety: Features protection against overcharge, over-discharge, short circuit, and reverse polarity. Constructed from fire-resistant ABS material.
• Wide Compatibility: Supports various Li-ion/IMR/INR/ICR (3.6V/3.7V) and Ni-MH/Ni-CD (1.2V) battery types.

3.2 Components

The XTAR X4 charger consists of the following main components:

• Charging Bays (x4): Slots for inserting batteries.
• LCD Display: Shows real-time charging information.
• AC Input Port: For connecting the AC power adapter.
• Micro USB Input Port: For connecting a Micro USB cable for power.
• USB Output Port: For charging external devices.

Image 3.1: Rear view of the XTAR X4 charger, clearly labeling the USB Output, Micro USB Input, and AC Input ports.

4. Specifications

4.1 Compatible Battery Types

The XTAR X4 charger is compatible with a wide range of rechargeable batteries:

• Li-ion / IMR / INR / ICR (3.6V/3.7V): 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, 32650.
• Ni-MH / Ni-CD (1.2V): AAAA, AAA, AA, A, SC, C.

Note: The charger can accommodate protected 20700/21700 batteries. It fits 4pcs 21700 batteries simultaneously.

Image 4.1: The XTAR X4 charger illustrating its compatibility with a diverse range of battery sizes and chemistries.

5. Setup

5.1 Power Connection

The XTAR X4 charger offers two methods for power input:

1. AC Power Adapter: Connect the provided AC power adapter to the AC input port on the back of the charger, then plug it into a standard wall outlet. This is suitable for indoor use.
2. Micro USB Cable: Connect a Micro USB cable to the Micro USB input port on the back of the charger, and connect the other end to a 5V/2.1A USB power source (e.g., a wall adapter, computer USB port, or power bank). This option is convenient for outdoor or portable charging.

Image 5.1: The rear panel of the XTAR X4 charger, indicating the AC Input and Micro USB Input ports for power connection.

6. Operating Instructions

6.1 Charging Batteries

1. Connect Power: Ensure the charger is connected to a power source using either the AC adapter or Micro USB cable as described in Section 5.1.
2. Insert Batteries: Carefully insert one or more rechargeable batteries into the charging bays, observing the correct polarity (+ and -) indicated on the charger. The charger will automatically detect the battery type and select an appropriate charging current.
3. Monitor Charging: The intelligent LCD screen will display real-time charging information for each bay, including battery power percentage, voltage, current, and accumulated charging capacity (mAh).
4. Charging Completion: The charger will automatically stop charging when the batteries are full. The LCD screen will indicate "Full" for the respective bay.

Image 6.1: The XTAR X4 charger with batteries in place, demonstrating the automatic current selection feature and the detailed information displayed on the LCD screen.

Image 6.2: A detailed view of the XTAR X4's LCD display, showing individual charging parameters for two battery bays, including voltage, current, and accumulated mAh.

6.2 USB Output Function (Power Bank Mode)

The XTAR X4 can function as a power bank to charge external devices when powered by AC or Micro USB, provided there are charged Li-ion batteries in the bays.

1. Ensure Batteries are Present: For the USB output function to work, at least one charged Li-ion battery must be present in the charging bays.
2. Connect External Device: Connect your external device (e.g., smartphone, tablet) to the USB Output port on the back of the charger using a compatible USB cable.
3. Charging Begins: The charger will begin supplying 5V/1A power to your device. The LCD screen may indicate USB output activity.

Image 6.3: The XTAR X4 charger actively charging a smartphone via its USB output port, illustrating its use as an emergency power supply.

7. Maintenance

To ensure the longevity and optimal performance of your XTAR X4 charger, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the charger's exterior. Do not use abrasive cleaners or solvents.
• Storage: Store the charger in a cool, dry place away from direct sunlight and extreme temperatures.
• Avoid Impact: Protect the charger from drops and impacts, which can damage internal components.
• Inspect Cables: Periodically check the power cables for any signs of damage. Replace damaged cables immediately.

8. Troubleshooting

If you encounter issues with your XTAR X4 charger, refer to the following common troubleshooting steps:

• Charger Not Powering On:
  • Ensure the power cable is securely connected to both the charger and the power outlet/USB source.
  • Verify that the power outlet or USB source is functional.
• Battery Not Charging:
  • Check that the battery is inserted with correct polarity.
  • Ensure the battery is a compatible rechargeable type.
  • The battery might be over-discharged. The charger has an 0V activation function for some over-discharged batteries.
  • Clean the battery contacts and charger contacts if they appear dirty.
• USB Output Not Working:
  • Ensure there is at least one charged Li-ion battery in the charger bays.
  • Verify the USB cable connecting to your external device is functional.
  • Check if the external device is compatible with 5V/1A charging.
• Abnormal Heat:
  • It is normal for the charger and batteries to warm up slightly during charging. However, if excessive heat is observed, immediately disconnect the charger and remove batteries. Contact support if the issue persists.

If the problem persists after attempting these steps, please contact XTAR customer support.

9. Warranty and Support

XTAR products are manufactured to high-quality standards. For specific warranty details, please refer to the warranty card included with your product or visit the official XTAR website. For technical support, product inquiries, or service, please contact XTAR customer service through their official channels.

You can find more information and contact details on the XTAR Official Store on Amazon.