Frequently Asked Questions

1. What are the key features of this charger?

• A built-in 200W power supply supports simultaneous charging of three batteries. The first battery reaches full charge in approximately 56 minutes, and all three batteries in approximately 110 minutes. A remote controller can be charged at the same time.

• Custom charging cables are available to support batteries from different drone models.

• A high-definition LCD displays charging parameters, the selected mode, and battery information, including voltage, charge level, temperature, and cycle count.

The charger is suitable for demanding applications such as surveying, inspection, and security operations.

2. What is included in the standard package?

The standard package includes:

• Charger × 1

• Matrice 4 Series battery charging cable × 3

• USB-C fast-charging cable × 1

• User manual × 1

• AC power cord × 1

3. What are the dimensions and weight?

The charger measures 138 × 64 × 52 mm (L × W × H) and weighs approximately 380 g, with a weight tolerance of ±10%.

These figures exclude the charging cables. Its compact, lightweight design makes it convenient to carry for outdoor inspections and field operations.

4. Does the charger support firmware updates? How do I update it?

Yes. Firmware updates are available through the official app to improve charging performance and compatibility.

1. Download the Polying app from your app store.

2. Connect a battery to the charger, then connect the charger to a 100–240V AC, 50/60Hz power supply using the AC power cord.

3. Enable Bluetooth on your phone. Open Polying, sign in, and tap the “+” icon in the upper-right corner. Place your phone near the powered-on charger and follow the pairing prompts.

4. When prompted during connection, tap the charger’s touch control to confirm pairing.

5. Open the device page in the app to view charging parameters and change modes.

6. Use the app to update the firmware when an update is available.

5. What is the charging power, and how long does a full charge take?

The charger has a total rated power of 200W and uses intelligent power allocation. It supports full-speed charging when one channel is in use and automatically distributes power when multiple channels operate simultaneously.

Under the stated standard test conditions, using original DJI Matrice 4 Series batteries charged from 10% to 100%:

• One battery: approximately 60 minutes

• Two batteries simultaneously: approximately 95 minutes

• Three batteries simultaneously: approximately 110 minutes

6. Will charging affect battery health?

According to LKTOP, using compatible batteries and following the operating instructions will not cause additional battery damage.

The charger includes six protection functions: overtemperature, overvoltage, overcurrent, short circuit, undervoltage, and overpower protection.

It monitors voltage, current, and cell temperature throughout charging and activates protection when an abnormal condition is detected, helping protect both the batteries and the charger.

7. What charging modes are available, and when should I use them?

Press and hold the function button for three seconds, then briefly press the mode-selection button on the startup screen to select a mode.

• Storage Mode — 60%: Select “60.” Suitable for transport, storage, and extended periods without use.

• Silent Mode — 100%: Select “100%” with the moon icon. Suitable for nighttime charging.

• Full Charge Mode — 100%: Select “100%” without the moon icon. Suitable for intensive operations and extended flight requirements.

8. What information does the display show?

The charger features a 1.5-inch wide-viewing-angle IPS display showing:

• Individual battery information: Real-time charging power, remaining charge, individual cell voltages, battery temperature, and cycle count for each channel.

• Power output: Total charger output power and real-time USB-C output power.

• Sound status: An icon indicating whether audible alerts are enabled.

This information helps users monitor charging progress, battery condition, and overall charger load.

9. What are the input and output specifications?

AC input:
100–240V AC, 2.5A, 50/60Hz, 230W

USB-C output:

• 5V ⎓ 3A

• 9V ⎓ 3A

• 12V ⎓ 3A

• 15V ⎓ 2.4A

• 20V ⎓ 1.8A

Maximum USB-C output power: 36W

Use power cords and adapters that meet the required specifications. Actual output power may vary depending on device compatibility and cable quality.

10. Can the charger charge batteries from other drone models?

Yes. The charger supports different drone batteries when used with the appropriate charging cables.

It has three independent battery output ports and one USB-C output port. Changing to the correct charging cables allows the battery ports to match the connectors and charging protocols of supported drone models.

It also supports simultaneous mixed charging of compatible batteries from different models.

The USB-C port supports PD fast charging and can simultaneously charge remote controllers, phones, tablets, and other compatible devices.

11. What is the operating temperature range? What are the risks in cold weather or direct sunlight?

The specified operating temperature range is 5°C to 40°C. Operating outside this range may trigger protection functions and increase the risk of damage.

Below 5°C:
Reduced lithium-battery chemical activity can significantly slow or stop charging. Forcing fast charging at low temperatures may cause irreversible cell damage and shorten battery life. Before charging outdoors in winter, warm the battery indoors to above 10°C.

Above 40°C:
The charger reduces power and limits current, while the cooling fan may run continuously at full speed. Prolonged exposure to high temperatures or direct sunlight can accelerate component aging and may trigger thermal shutdown.

Do not charge for extended periods inside an enclosed vehicle or in direct sunlight.

12. Is it normal for the charger to become warm or for the fan to run at high speed?

Heat generation and automatic fan operation are normal during high-power fast charging.

Normal behavior:

• The charger feels warm.

• The fan starts and stops automatically according to charging power.

• The displayed battery temperature is 45°C or lower.

• There is no unusual smell, and the housing is not too hot to touch.

• The airflow path remains unobstructed.

LKTOP states that its cooling performance is better than that of the original single-channel charging hub.

Warning signs:

• The housing is too hot to hold.

• The fan runs continuously all day.

• A high-temperature warning appears.

• There is a smell of burning plastic.

Keep the air inlet and outlet clear. Place the charger on a rigid, ventilated surface. An additional small fan may help with cooling during outdoor summer use.

13. What should I check if the charger does not recognize a battery or displays a flashing error indicator?

These symptoms are commonly caused by poor electrical contact, temperature protection, or a power-supply issue.

1. Clean the charging contacts. Remove the battery. Use a cotton swab moistened with 95% alcohol to clean the battery’s metal contacts and the charger’s spring contacts, removing dust, salt deposits, and oxidation. Allow the contacts to dry completely before reconnecting.

2. Try another channel. Connect the battery to either of the other two charging channels to check whether the issue is limited to one port.

3. Check battery temperature. After a flight, allow the battery to cool for 10 minutes before charging. Battery temperatures above 45°C or below 5°C can trigger temperature protection, preventing charging and producing an error.

4. Check the power connection. Disconnect and reconnect the main SDC power cable and confirm that the connected power source provides sufficient power. Insufficient power can also cause recognition problems and errors.

If the issue persists after these checks, contact official after-sales support for inspection.

14. Can I charge one, two, or three batteries? Is power reduced by half when charging only one?

The charger supports one, two, or three batteries, with independent parallel charging channels.

Its total rated power is 200W. With only one battery connected, the active channel can deliver a peak output of up to 180W, so charging power is not automatically halved.

When multiple batteries are connected, the intelligent dynamic power-allocation system adjusts output according to