Tenergy T-9688 Super Universal LCD Battery Charger with USB Port

Introduction

The Tenergy T-9688 Super Universal LCD Battery Charger is designed for convenient and efficient charging of various Ni-MH rechargeable batteries. It features individual charging channels, an intelligent microprocessor, and a clear LCD display to monitor battery status. Additionally, it includes a built-in USB output for charging personal digital devices.

Image: The Tenergy T-9688 charger, showcasing its sleek black design with a translucent blue top cover and front LCD screen.

Setup

1. Unpack the Charger: Carefully remove the Tenergy T-9688 charger and its accessories from the packaging.
2. Connect Power Adapter: Insert the DC plug of the supplied AC adapter (100-240V AC) into the "INPUT: DC12V" port located at the back of the charger.
3. Plug into Power Outlet: Plug the AC adapter into a standard wall power outlet. The charger's LCD screen should illuminate briefly, indicating it is powered on and ready for use.

Image: The Tenergy T-9688 charger alongside its included AC power adapter, ready for connection.

Image: A close-up view of the back of the Tenergy T-9688 charger, highlighting the DC 12V input port and the 5V USB output port.

Operating Instructions

Battery Insertion and Charging

The T-9688 charger supports Ni-MH batteries of sizes AA, AAA, C, D, and 9V. It features individual charging channels, allowing you to charge batteries in single or group configurations.

1. Open the Cover: Lift the translucent blue cover of the charger.
2. Insert Batteries:
   • For AA/AAA/C/D batteries: Insert 1 to 4 pieces into their respective slots, ensuring correct polarity (+/-). The charger automatically selects the appropriate charging current.
   • For 9V batteries: Insert 1 to 2 pieces into the dedicated 9V channels, ensuring correct polarity.
3. Monitor Charging Status: The blue Electric LCD screen will display the status of each battery, indicating "Charge," "Discharge," "Full," or "Bad."
4. Backlight Function: Press the backlight button once to illuminate the LCD screen for 10 seconds, useful during trickle charging mode.

Image: A close-up of the Tenergy T-9688 charger with AA batteries inserted, showing the illuminated LCD display indicating charging status.

Image: The Tenergy T-9688 charger with a mix of C and 9V batteries inserted, demonstrating its universal compatibility.

Image: An overhead view of the empty battery compartments within the Tenergy T-9688 charger, showing the individual charging channels for various battery sizes.

Discharge Function

The charger includes an automatic charge and discharge function. This feature helps to optimize battery life by fully discharging batteries before recharging them, preventing memory effect in Ni-MH batteries.

To initiate discharge, press the 'D' (Discharge) button located on the left side of the LCD screen. The LCD will indicate "Discharge" for the selected battery channels. Once discharged, the charger will automatically switch to charging mode.

USB Output Usage

The T-9688 charger features a built-in USB outlet (output: 5V DC 500mA) for charging and powering personal digital devices such as mobile phones, iPods, MP3/MP4 players, PDAs, and portable game devices.

1. Locate USB Port: The USB output port is located at the back of the charger, next to the DC input port.
2. Connect Device: Connect your digital device to the USB port using a compatible USB cable.
3. Charging: The charger will provide 5V DC 500mA output to your device. Note that the USB port may not charge simultaneously with battery charging if the charger's power is fully utilized by battery charging. It will prioritize battery charging.

Image: The Tenergy T-9688 charger connected to a smartphone via its rear USB output port, demonstrating its device charging capability.

Safety Features

• Negative Delta V (-ΔV) Cut-off: This function automatically terminates charging for AA/AAA/C/D size batteries when they are fully charged, preventing overcharging. (Note: This feature does not apply to 9V batteries).
• Safety Timer Control: An internal timer provides overcharge protection by limiting the maximum charging time for each battery type.
• Short Circuit Protection: Protects the charger and batteries from damage in case of a short circuit.
• Non-rechargeable/Bad Cell Detection: The charger can identify non-rechargeable batteries or damaged cells and will not attempt to charge them, displaying "Bad" on the LCD.
• Mechanical Protection Against Reverse Polarity: Designed to prevent damage from incorrect battery insertion.

Maintenance

• Cleaning: Disconnect the charger from power before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use abrasive cleaners or solvents.
• Storage: When not in use, store the charger in a cool, dry place away from direct sunlight and extreme temperatures.
• Battery Contacts: Periodically inspect the battery contacts for any debris or corrosion. Clean gently if necessary to ensure optimal connection.

Troubleshooting

Charger not powering on:

Ensure the AC adapter is securely connected to both the charger and a working power outlet. Verify the power outlet is active.

LCD displays "Bad" for a battery:

This indicates the battery is either non-rechargeable or damaged. Remove the battery and replace it with a known good, rechargeable Ni-MH battery. If the issue persists with multiple batteries, the charging channel may be faulty.

Batteries not charging or charging slowly:

• Ensure batteries are inserted with correct polarity.
• Verify batteries are Ni-MH type. This charger is not designed for other battery chemistries.
• Check if the battery contacts in the charger or on the battery are dirty or corroded.
• Charging time varies by battery capacity. Refer to the "Charging Time Table" in the specifications.

USB output not working:

• Ensure the charger is powered on.
• Verify the USB cable is functional and correctly connected to both the charger and the device.
• If batteries are simultaneously charging, the USB output might be temporarily disabled or provide reduced current to prioritize battery charging.

Specifications

Approximate Charging Time Table (Ni-MH)

Safety Timer Control (Maximum)

Warranty and Support

For specific warranty information and technical support, please refer to the official Tenergy website or contact Tenergy customer service directly. Warranty terms and conditions may vary and are subject to the manufacturer's policy at the time of purchase.

You can visit the official Tenergy store for more information: Tenergy Store on Amazon