XTAR X4 Multi-Chemistry Battery Charger User Manual

1. Introduction

The XTAR X4 is an advanced 2A fast AC power battery charger designed for a wide range of rechargeable batteries. It features four independent charging slots, an innovative LCD screen display, dual input ports (AC and Micro USB), and a USB output function to serve as a power bank. The charger incorporates multiple safety protections and a 0V activation function to revive over-discharged batteries.

2. Package Contents

Upon opening the package, please verify that all items are present and in good condition:

• XTAR X4 Charger Unit
• Power Cord
• User Manual

Image: The XTAR X4 charger, power cord, and user manual as included in the package.

3. Safety Instructions

To ensure safe operation and prolong the life of your charger and batteries, please adhere to the following safety guidelines:

• This charger is designed for indoor use only. Do not expose it to rain, moisture, or extreme temperatures.
• Use only compatible batteries as specified in the 'Battery Compatibility' section. Charging incompatible batteries may lead to damage or injury.
• Ensure correct battery polarity when inserting batteries into the charging slots. The charger includes reverse-polarity protection, but correct insertion is always recommended.
• Do not disassemble, modify, or attempt to repair the charger. Refer all servicing to qualified personnel.
• Keep the charger away from children and pets.
• Unplug the charger from the power source when not in use or during cleaning.
• The charger is constructed with fire-retardant materials and features built-in protections against short circuits, overcharge, and overheating.

Image: Icons representing the multiple safety features of the XTAR X4 charger, including reverse-polarity protection, short circuit protection, overcharge protection, and overheat protection.

4. Setup

Follow these steps to set up your XTAR X4 charger:

1. Unpack the Charger: Carefully remove the XTAR X4 charger and its accessories from the packaging.
2. Connect Power: Connect the provided AC power cord to the AC input port on the back of the charger, then plug it into a standard wall outlet. Alternatively, you can use a Micro USB cable to connect the charger to a 5V USB power source.
3. Initial Check: The LCD screen should illuminate, indicating the charger is powered on and ready for use.

Image: The two input options for the XTAR X4 charger: an AC interface for wall power and a Micro USB port for flexible charging from various sources.

5. Operating Instructions

5.1 Battery Compatibility

The XTAR X4 charger is compatible with a wide range of 3.6V/3.7V Li-ion/IMR/INR/ICR batteries and 1.2V Ni-MH/Ni-CD batteries. Refer to the list below for specific sizes:

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

Note: 20700 and 21700 batteries with protective plates cannot be charged due to size constraints.

Image: Diagram illustrating the wide range of battery types and sizes compatible with the XTAR X4 charger.

Image: Various battery sizes being inserted into the XTAR X4 charger slots, demonstrating its adaptability to different battery dimensions.

5.2 Inserting Batteries

Gently slide the battery into an available charging slot, ensuring the positive (+) and negative (-) terminals align correctly with the markings on the charger. The charger will automatically detect the battery type and begin the charging process.

5.3 LCD Screen Display

The innovative LCD screen provides real-time information about the charging status of each battery:

• Battery Voltage: Displays the current voltage of the battery.
• Battery Power Percentage: Shows the estimated charge level.
• Charge Current: Indicates the current charging rate (e.g., 0.5A, 1A, 2A).
• Battery Charged Capacity: Displays the amount of capacity charged into the battery in mAh.

Image: Close-up of the XTAR X4's LCD screen, highlighting displayed information such as battery voltage, battery power percentage, charge current, and battery charged capacity.

5.4 Charging Process

The XTAR X4 employs a three-stage charging method (TC-CC-CV) to optimize battery health and charging efficiency. It can charge two 18650 2500mAh batteries in approximately 1.5 hours at a 2A current.

• Trickle Current (TC): Initial low current charge for deeply discharged batteries.
• Constant Current (CC): Main charging stage at a steady current.
• Constant Voltage (CV): Final stage where voltage is held constant, and current gradually decreases until fully charged.

Image: Illustration demonstrating the fast charging capability of the XTAR X4, showing that two 18650 2500mAh batteries can be fully charged in 1.5 hours at 2A current, compared to 3 hours at 1A.

Image: Diagram illustrating the three-stage charging method (TC-CC-CV) used by the XTAR X4 charger for optimal battery health and charging efficiency.

5.5 USB Output Function (Power Bank)

The XTAR X4 can function as a 5V USB power bank. When batteries are inserted and the charger is not connected to AC power, you can connect external devices (e.g., smartphones, cameras, tablets) to the USB output port to charge them.

Image: Visual representation of the XTAR X4's 5V USB output function, allowing it to act as a power bank to charge external devices like phones, cameras, and other gadgets.

5.6 0V Activation Function

The XTAR X4 features a 0V activation function that can revive certain over-discharged Li-ion batteries. If a compatible Li-ion battery has been discharged to 0V, inserting it into the charger may initiate a low-current activation process to bring it back to a safe voltage level for normal charging.

Image: Diagram illustrating the 0V activation function, which can revive over-discharged batteries, bringing them back to a usable state.

6. Maintenance

Proper maintenance ensures the longevity and optimal performance of your XTAR X4 charger:

• Cleaning: Use a soft, dry cloth to clean the charger's exterior. Do not use abrasive cleaners or solvents. Ensure the charger is unplugged before cleaning.
• Storage: Store the charger in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
• Inspection: Periodically inspect the power cord and charger for any signs of damage. If damage is found, discontinue use and contact customer support.

7. Troubleshooting

If you encounter issues with your XTAR X4 charger, refer to the following common problems and solutions:

• Charger Not Powering On:
  • Ensure the power cord is securely connected to both the charger and a working power outlet.
  • Try a different power outlet or USB power source.
  • Check the power cord for any visible damage.
• Battery Not Charging:
  • Verify that the battery is inserted with correct polarity.
  • Ensure the battery type is compatible with the charger (refer to 'Battery Compatibility').
  • Check if the battery is severely over-discharged. The 0V activation function may attempt to revive it, but some batteries may be beyond recovery.
  • Clean the battery contacts and charger contacts with a dry cloth to ensure good connection.
• LCD Screen Not Displaying Correctly:
  • Restart the charger by unplugging and re-plugging it.
  • Ensure the charger is operating within the specified temperature range (0-40°C).
• Overheating:
  • Ensure adequate ventilation around the charger. Do not cover it during operation.
  • If overheating persists, discontinue use and contact customer support.

If these steps do not resolve the issue, please contact XTAR customer support for further assistance.

8. Specifications

Image: An overview of the XTAR X4 charger highlighting its features and specifications.

9. Warranty and Support

XTAR products are manufactured to high-quality standards. For warranty information and customer support, please refer to the warranty card included with your product or visit the official XTAR website. Keep your purchase receipt as proof of purchase for warranty claims.