FAQ

1. Reseat the memory: The memory module might not be properly seated. Remove it and firmly reinstall it, making sure the clips on both sides snap into place.  
2. Try different slots: Test the memory in different slots to rule out any slot-related issues.  
3. Test modules individually: Check each memory module one at a time to identify any faulty ones.  
4. Update BIOS: Some motherboards require a BIOS update to properly recognize the memory.  
5. Use memory diagnostic tools:  
   - Windows Memory Diagnostic: Press Windows + R, type `mdsched.exe`, then choose “Restart now and check for problems.”  

If the issue persists after these steps, please contact customer support for further assistance.

1. Shut down your computer and unplug it to prevent static damage.  
2. Open the case and locate the memory slots.  
3. Align the gold connectors and insert the memory module straight down, making sure the clips on both sides snap into place.  
4. Restart your computer and enter the BIOS to verify the memory is recognized correctly.

Windows:  
- Open Task Manager → Performance → Memory to see capacity, speed, and number of slots used.  
- Command Prompt: Press Win + R, type cmd, then enter the following command to check details:  
wmic memorychip get manufacturer, partnumber, speed, capacity, formfactor  
  (Speed indicates frequency in MHz; formfactor shows 8 for desktop DIMM, 12 for laptop SODIMM.)  

Mac:  
- Click the Apple menu → About This Mac → System Report → Memory to view capacity, speed, manufacturer, and more.

- If your computer frequently crashes, shows a blue screen, or restarts on its own, it could be a memory issue.  
- Try removing one memory stick at a time to see if that fixes the problem.  
- Run the Windows Memory Diagnostic tool by pressing Windows + R, then typing mdsched.exe.  
- You can also download and run MemTest86. If you find errors, it’s a good idea to replace your memory modules.

- Not recommended: Mixing memory modules with different speeds or capacities can cause stability issues, lower performance, or even prevent your computer from starting.  
- Speed impact: When modules with different speeds are used, the system will run at the speed of the slowest one.  
- Capacity impact: Mixing different memory sizes is possible but may disrupt dual-channel mode, resulting in reduced performance.

- Not compatible: DDR4 and DDR3 memory cannot be used interchangeably due to differences in slots and voltage.  
- Different slots: DDR4 uses a 288-pin slot, while DDR3 uses a 240-pin slot, so they cannot be physically installed in the same slot.

- XMP (Extreme Memory Profile) is a memory overclocking feature that lets your RAM run at higher speeds.  
- How to enable it:  
  1. Enter the BIOS/UEFI by pressing Del or F2 during startup.  
  2. Locate the XMP option, usually under the “AI Tweaker” or “Memory” tab.  
  3. Choose either XMP Profile 1 or Profile 2.  
  4. Save your changes and restart your computer.

- Check the installation: Make sure the memory module is fully seated in the slot.  
- Clean the contacts: If you notice any oxidation, gently rub the gold contacts with a pencil eraser before reinstalling.  
- Verify compatibility: Some systems may not support this memory; please consult your motherboard’s specifications.

- Check system compatibility: Make sure your motherboard and operating system support the memory capacity.  
- BIOS update: Some motherboards may not recognize the memory density, so it’s recommended to update your BIOS/UEFI before testing.

- Your motherboard and CPU may limit memory frequency, preventing it from reaching the advertised speed.  
- Enable XMP (for Intel) or EXPO (for AMD) profiles on some overclocked memory to achieve the claimed speeds.

- Compatibility: Make sure the RAM type matches exactly (DDR3, DDR4, and DDR5 are not interchangeable).  
- Frequency Matching: It’s best to use RAM sticks with the same speed (e.g., 3200MHz) to maintain optimal performance.  
- Maximum Supported Capacity: Check your motherboard or laptop’s maximum RAM capacity (such as 32GB or 64GB).  
- Slots and Dual Channel: Aim for a dual-channel setup—like 8GB x 2—for better performance compared to a single 16GB stick.  
- Laptop vs. Desktop: Laptops use SODIMM memory, while desktops use DIMM; these are not compatible with each other.

A new SSD must be initialized before use. Follow these steps to set it up:  
1. Press Win + R, type diskmgmt.msc, and open Disk Management.  
2. Locate the SSD marked as “Not Initialized,” right-click it, and select “Initialize Disk.”  
3. Choose GPT (for drives over 2TB) or MBR (for drives under 2TB).  
4. Right-click the “Unallocated” space, create a new volume, and format it as NTFS or exFAT.

- Verify Connections: Test by swapping SATA / NVMe cables or trying different slots.
- Check BIOS Settings: Confirm if the SSD is detected in BIOS.
- Disk Management Tool: Use Win + R to open diskmgmt.msc and check if the disk appears.
- Update Drivers: Update SSD drivers in Device Manager.
- Troubleshoot with CMD:
  1. Open Command Prompt (as administrator).
  2. Enter `diskpart` → `list disk` to check SSD detection.

Traditional hard drive (HDD) diagnostic tools don’t work for SSDs because SSDs don’t use spinning disks and don’t have "bad sectors." For checking your SSD’s health, it’s best to use tools specifically designed for them, like SP ToolBox.

Possible causes include:  
- Incorrect BIOS settings: Enter BIOS and set SATA to AHCI mode.  
- SSD controller chip issues: Try unplugging and reconnecting the SSD. If the problem continues, repair or replacement may be needed.  
- Partition table corruption: You can reinitialize the SSD using Disk Management, but this will erase all data.

This difference comes from how manufacturers and computers calculate storage:

- Manufacturers use the decimal system: 1GB = 1,000MB  
- Computers use the binary system: 1GB = 1,024MB  

For example, a 1TB (1,000GB) SSD will show up as about 931GB on your computer. Additionally, the system keeps some space reserved for caching and backups.

- Avoid excessive writing: SSDs have a limited write lifespan (TBW), so try not to perform large-scale, continuous writes.  
- Keep enough free space (10-20%) to help the garbage collection (GC) process run smoothly.  
- Regularly update your firmware to ensure optimal performance and stability.  
- Use an SSD monitoring tool like SP ToolBox to check your drive’s health and lifespan indicators (TBW, bad sectors, etc.).

You can check your SSD status using the following methods:
- SP ToolBox (Windows): Monitor SSD health, total data written (TBW), and bad blocks.
- Speed tests: Use CrystalDiskMark on Windows or Blackmagic Disk Speed Test on Mac to measure read/write speeds.
- Temperature monitoring: Keep an eye on SSD temperature—if it exceeds 70°C, it may impact stability.

SSD overheating (above 70°C) can cause slowdowns or crashes. To prevent this:  
- Ensure your computer has good airflow.  
- Use heatsinks on M.2 SSDs or built-in motherboard cooling solutions.  
- Avoid extended heavy write tasks like 4K video editing.

SSDs are ideal for system drives, boosting your startup times and app loading speeds. Recommendations:
- Install Windows OS yourself.
- Use a GPT partition scheme for drives 2TB or larger.
- Install Windows on the SSD and enable AHCI mode for best performance.
- Turn on the TRIM command to help extend your SSD’s lifespan.

SSD performance can slow down over time due to extended use. Key factors and solutions include:  
- Avoid filling your drive completely: Keep at least 10-20% free space to help the garbage collection (GC) process.  
- Enable TRIM: Both Windows and macOS automatically activate TRIM commands to maintain peak SSD performance.  
- Limit long, heavy file writes: For tasks like 4K video editing, use an HDD as a storage drive.  
- Restart regularly: This allows the SSD’s internal garbage collection to run and boost performance.

Possible solutions include:  
- Enable CSM (Compatibility Support Module) in BIOS, then rescan for the SSD.  
- Install the Intel Rapid Storage Technology (IRST) driver, which is required on some Intel platforms for SSD detection.  
- Disable the VMD (Volume Management Device) Controller in BIOS settings.

If the USB drive cannot be detected, here are some possible causes and solutions:

1. USB port issues: Try using a different USB ports on the computer or unplug and replug the drive a few times to see if it works.

2. Driver issues: Open Device Manager to check for any error symbols (⚠️). Try reinstalling the USB driver if needed.

3. USB drive malfunction: If the drive cannot be read on multiple devices, it may be damaged.

⚠️ If the above steps do not resolve the issue, please contact our customer support. We’ll assist you with further diagnosis and solutions!

The reason why the storage capacity displayed on a computer is always less than the actual capacity is due tobelow :

1. The difference in calculation methods. Computers use a binary system for storage calculation, where 1GB is equal to 1024 × 1024 × 1024 = 1,073,741,824 bytes (since 1024 is 2 to the power of 10). 
2. USB drives are formatted by default setting such asFAT32, exFAT, NTFS which might reserves some space. 
3. Additionally,  it reserves some space of the total capacity for cache record, error correction etc.

💡 This is a normal condition and does not impact the functionality of the USB drive.

Our USB drives are pre-formatted in FAT32, which has a maximum file size limit of 4GB per file.
To store files larger than 4GB, you can reformat the USB drive to exFAT (compatible with both Windows & Mac) or NTFS (writeable on Windows only).

How to Format (exFAT is recommended):

Windows: Right-click the USB drive → Format → Select exFAT → Click Start.

Mac: Open Disk Utility → Select the USB drive → Click Erase → Choose exFAT → Click Erase.

Consider USB 2.0 if you need:

1. Mainly store documents, photos, or basic media files with no high speed requirements
2. Prefer a more cost-effective option for general backups or everyday file transfers

Consider USB 3.0 if you need:

1. Work with large files such as 4K videos, games, or project files
2. Need faster data transfer speeds
Note: USB 3.0 is backward compatible with USB 2.0 ports, but full speed is only achieved with a USB 3.0 or higher port

📌 Quick Recommendation:

Occasional use / small file transfers 👉 USB 2.0 is sufficient
Fast transfers / large data migration 👉 USB 3.0 is the better choice

Possible Cause:

The file system may be corrupted, preventing the computer from reading the data.

Solutions:

If the USB contains important data, try recovering it using our recommended tool:
Recuva (File Recovery Software)
👉 https://www.silicon-power.com/web/tw/download-Recuva

If there is no important data, you can use Disk Management to format the drive and create a new partition.

1. This issue may occur if the USB drive was improperly removed while saving data, causing damage to the internal file system.
2. To reduce the risk of data corruption, always perfor“Safely Remove Hardware" before unplugging the USB drive.
3. We recommend backing up your data first, then reformatting the USB drive.

If the issue causes, please contact our customer service team for further assistance and support.

Try removing the USB drive in Safe Mode using these steps:
Start → Settings → Control Panel → System → Hardware → Device Manager →
Universal Serial Bus Controllers → USB Mass Storage Device
→ Right-click the device → Select Uninstall → Click OK.
Wait a moment and then safely remove the USB drive.

USB drives are not designed for long-term storage. To keep your data safe, please follow these recommendations:

1. Back up regularly: USB drives have a limited lifespan. We suggest backing up important files to the cloud or an external hard drive.

2. Remove the drive properly:

Windows: Click the USB icon in the bottom-right corner → Choose Safely Remove Hardware → Remove the drive after confirmation.
Mac: Drag the USB icon to the Trash, or click the Eject button before unplugging.

3.  Avoid extreme environments: High temperatures and humidity can shorten the lifespan of the USB drive. Store it in a cool, dry place.

4. Protect against viruses: USB drives are vulnerable to malware. Use antivirus software regularly and avoid connecting the drive to unprotected computers.

Here are possible causes and solutions:

OTG function not enabled on the phone: Some phones require manually enabling OTG. You can turn it on via Settings → More Connections on the phone.

Phone system or app issues:   Restart the phone, or use the built-in Files app or download a File Manager app to check if the OTG USB drive is detected.

Unsupported USB drive format: Some Android devices do not support exFAT or NTFS formats. Try formatting the drive to FAT32 on a computer (⚠️Formatting will erase all data).

Compatibility Requirements:

1. Android phones/tablets: Must support OTG (On-The-Go) functionality. Most newer Android devices are OTG-compatible.

2. Windows/Mac computers: Can be used directly without additional setup.

3. iPhone/iPad (Lightning port): Requires a Lightning-compatible USB drive designed specifically for iOS devices.

💡 Tip: Before purchasing, check whether your device supports OTG. You can test this using an OTG checker app.

The speed of a memory card affects read/write performance. Choose based on the following markings:

Class 10 (C10): Minimum 10MB/s, it is suitable for daily base use.
UHS Speed Class 1 (U1) or 3 (U3): Minimum 10MB/s , it is suitable for Full HD recording
Video Speed Class (V30, V60, V90):  Minimum 30MB/s , it is suitable for high-definition video recording

💡Please choose U3 or V30 grade above memory card for camera or 4K recording.

The reason why the storage capacity displayed on a computer is always less than the actual capacity is due tobelow :

1. The difference in calculation methods. Computers use a binary system for storage calculation, where 1GB is equal to 1024 × 1024 × 1024 = 1,073,741,824 bytes (since 1024 is 2 to the power of 10). 
2. Additionally, SP reserves 3% to 5% of the total capacity for device firmware and data storage management, which helps to improve the product's reliability and lifespan. 

Therefore, a storage device labeled as 64GB actually has a capacity of 64,000,000,000 bytes. When this is converted to the binary system used by the computer, it becomes:
64,000,000,000 ÷ 1,073,741,824 ≈ 57GB~59GB.

1. Please make sure the specification of the Memory Card is compatible with your device.
   -SDXC Memory Card can only be used on a device that supports SDXC.
   -SDHC Memory Card can be used on a device that supports SDHC and SDXC.
   -SD Memory Card can be used on a device that supports SD, SDHC and SDXC. 2. Please use our compatibility chart to confirm 
2. Memory Card compatibility with your device
https://support.silicon-power.com/en/compatibility/?tab=product

Here are some common reasons why your memory card might not be readable and what you can do to troubleshoot the issue:

1. Check for Physical Damage: Inspect the memory card for any visible physical damage like cracks, bends, or warping.
2. Ensure Correct Insertion: Make sure the memory card is inserted correctly and fully into the device.
3.  Test with Other Devices: Try inserting the memory card into another device (like a computer or another phone) to see if it can be read there. This helps determine if the issue is with the card itself or the original device.
4.  Clean the golden finger of memory card: The golden finger of  the memory card might be oxidized or dirty. Gently wipe the golden fingers with a dry cloth.
5.  Perform Error Checking and Repair: Use a computer built-in tool to check  and repair any errors on the memory card.
⚠ Important: If you've tested the memory card with other devices and it still can't be read, it might require replacement.

1. If it is SD card, please ensure the Lock switch of Memory Card is set to the "Writeable" position.
2. Please try to format memory cards on different devices, for example, cameras or computers.
3. Use the following (SD formatter: https://www.sdcard.org/cht/downloads/formatter_4) to format the card.  After formatting, please put the card back into the device to make sure it is working.  If a "not format error" occurs, the card is confirmed to be damaged. 

Choosing the suitable memory card for your dashcam or surveillance system is crucial for reliable performance. Here's what you should look for:

Opt for High Endurance Cards: It's highly recommended to choose high-endurance memory cards specifically designed for dashcams and surveillance cameras. These cards, like the "Golden Series High Endurance microSD," are built to withstand the continuous read/write cycles required by these devices.

Check Speed Class: Ensure the memory card has a speed class of Class 10, UHS-I, or higher. This guarantees smooth video recording without dropped frames or interruptions.

Match Device Capacity: Select a memory card that is compatible with your device's supported capacity. Using a card that exceeds the maximum supported capacity of your dashcam or surveillance camera can lead to compatibility issues.

Avoid Standard Consumer Cards: Do not use general-purpose memory cards designed for mobile phones or digital cameras. Devices with high write-cycle recording demands, like dashcams, require cards with much greater durability.

Please refer to the chart below to see the approximat numbers of several data types that can be stored in the memory card.

When you're using a memory card with your dashcam for the first time, here's how to set it up properly:

Format in the Dashcam: It's highly recommended to format the memory card directly within your dashcam's settings the first time you use it. This ensures optimal compatibility between the card and your specific dashcam.

Confirm Insertion and Recognition: Make sure the memory card is inserted correctly into the dashcam, and then confirm that the device recognizes it properly.

Configure Recording Settings: Set up your preferred recording mode and activate the loop recording function. Loop recording is crucial for dashcams as it automatically overwrites the oldest footage when the card is full.

Regular Formatting: To maintain stable recording performance, it's necessary to  format your memory card regularly, this helps prevent data corruption and ensures smooth operation over time.

1. After extended use, memory card storage blocks may become fragmented due to frequent writing, which can impact read/write speeds.

2. It is recommended to back up your data regularly and format the memory card periodically to maintain optimal performance.

3. When the card is nearly full, read/write speed may decrease. Keeping some free space can help improve performance.

4. Using a low-speed or incompatible memory card in devices with high write demands (e.g., dashcams, surveillance cameras) may result in performance drops. It is advisable to use high-endurance memory cards for such purposes.

It's recommended to format them periodically to maintain stable performance, especially:

1. If you experience slow reading speeds or are unable to access files.
2. If  you used memory cards in dashcams or surveillance cameras, it's advisable to format every 1-2 months to prevent data fragmentation from affecting read/write speeds.

💡 Always back up important data before formatting to avoid accidental deletion!

Memory cards can be used across different devices, but compatibility issues may arise. It is recommended to:

1. Format the card in the device such as a camera or dashcam before using.
2. Avoid frequent switching between devices (e.g., camera ⇄ smartphone), as this may cause file corruption.
💡 Different devices may use different file systems. If issues occur, reformat the card in the intended device!

1. Connect the portable hard drive to your Mac.
2. Open the [Applications] folder and go to[Utilities].
3. Launch [Disk Utility].
4. Select the portable hard drive and click [Erase].
5. Then ,choose exFAT under format.
6. Enter a name for the drive, then click Erase to begin formatting.

💡 Once formatted, the drive can be used with both Mac and Windows systems.
⚠️ Please make sure to back up any important data before formatting, as this process will erase all contents on the drive.

If the HDD is not detected after connection, here are possible causes and solutions below:

1. Insufficient power supply: Large-capacity HDDs require more power. Connect directly to a rear USB 3.0 port (usually blue) on the computer, and avoid using USB hubs.

2.  Uninitialized disk: Open Disk Management in Windows to check if the drive is marked as "Not Initialized." If so, initialize and format it manually.

3.  Incompatible format: Some drives are pre-formatted as NTFS, which is readable/writeable only on Windows. If you're using a Mac, reformat to exFAT or APFS.

4. USB port or cable issue: Try using a different USB port or cable. You may also test the drive on another device to confirm if the issue is with the drive itself.

1. Loose USB connection: A loose USB port can cause disconnection. Try switching to a different port or replacing the USB cable.
2. Power-saving settings:  Some computers automatically disable idle USB ports to save power. Adjust the power management settings to prevent this.
3.Insufficient power supply: High-capacity HDDs may require additional power. Plug the drive directly into a rear USB 3.0 port for better and more stable power delivery.

1. Drive damage: Internal damage or bad sectors on the hard drive can cause formatting failures.
2. Partition table error: A corrupted MBR or GPT partition table can prevent successful formatting.
3. Insufficient power: Inadequate power supply during formatting may interrupt the process.
4. Operating system issues: Some OS versions may not properly recognize or format the drive. Try updating your system or using third-party formatting tools.

The reason why the storage capacity displayed on a computer is always less than the actual capacity is due tobelow :

1. The difference in calculation methods. Computers use a binary system for storage calculation, where 1GB is equal to 1024 × 1024 × 1024 = 1,073,741,824 bytes (since 1024 is 2 to the power of 10). 
3. Additionally,  it reserves some space of the total capacity for cache record, error correction etc.

There are several factors that may cause an external hard drive to slow down. You can try the following solutions:

1. Excessive Disk Fragmentation (Windows): Use the “Disk Defragmenter” tool to optimize the drive and improve read performance.
2. Low Storage Space: Make sure at least 10–20% of the drive remains free to avoid performance drops.
3. File System Errors: Use the Command Prompt in Windows and enter chkdsk /f to repair disk errors.
4. USB Interface Speed: If you connect the drive to a USB 2.0 port, read speeds may be limited. It's recommended to connect the drive to USB 3.0 or above to get faster performance.

To keep your external hard drive in good condition, keep these tips in mind:

1. Always safely eject the drive before unplugging it.
2. Use the original USB cable to ensure stability and proper transfer speeds.
3. Avoid frequent plugging and unplugging to reduce wear and tear.
4. Prevent the drive from overheating; ensure good ventilation.
5. Back up your data regularly to avoid data loss.

You can connect portable hard drive to Android cell phones based on below following requirements:

1. OTG Support must:  Most Android devices support OTG (On-The-Go), but you may need to enable it in settings on some Android devices.
2. To confirm drive format: The hard drive should be formatted as exFAT, which is widely compatible with Android. If it's formatted in NTFS, the device might not recognize it or access the files.
3. To know how to connect the drive: Use a USB-C to USB-A OTG adapter or a proper USB-C trasnfer cable.
4.  To ensure sufficient power supply:  Ensure your phone has more than 50% battery to prevent unstable connections due to power shortage.

💡 Android phones can indeed connect to external HDDs, but you must confirm OTG support, proper formatting, and sufficient power.

1. Connect the HDD:
Use USB-A to USB-C trasfer cable or OTG adapter to connect the drive to your Android devices.

2. Format the HDD:
Make sure the drive is formatted to exFAT for compatibility with Android devices.

3. Enable OTG Function:
Check if your phone supports OTG and enable it in settings if necessary.

4. Confirm the Connection:
After connecting, pull down the status bar to check if the drive is recognized.

5. Transfer Files:
Use the native “Files” app or a third-party file manager to move files from your phone to the external HDD.

Blue Light: Indicates the drive is connected via USB 3.0 port.
Red Light: Indicates the drive is connected via USB 2.0 port.
⚠ Flashing Light: Indicates that it is tranferring, please do not disconnect it.

1. Make sure the USB port on the media device provides enough power (recommended: DC 5V/1A).

2.If power is insufficient, use an external power supply for the HDD.

3. Ensure the drive is formatted as FAT32 or NTFS, and reformat it if necessary.

If your power bank won’t charge, please follow these steps to troubleshoot:

1. Try a different charging cable and charger  
Use another USB cable and charger to connect your power bank, and let it charge for 10–15 minutes to see if it starts working.

2. Test other power sources  
Plug into a different wall outlet, a computer USB port, or another charging device to rule out power source issues.

3. Check the power bank’s battery level and indicator lights  
If the battery is very low, it might not start charging right away. Keep it plugged in for at least 30 minutes before checking again.

4. Press the power button  
Some power banks need to be manually turned on to begin charging. Press the power button briefly and see if any indicator lights turn on.

5. Inspect the power bank’s condition  
Look for any swelling, deformation, or unusual heat. If you notice any of these signs, stop using the device and replace it.

⚠ If these steps don’t fix the problem, please contact our customer support for further assistance.

- 10,000mAh Power Bank:  
Standard charging takes about 6-8 hours.  
Using an 18W or higher fast charger: fully charges in about 4-6 hours.  

- 20,000mAh Power Bank:  
Standard charging takes about 8-10 hours.  
Using an 18W or higher fast charger: fully charges in about 6-8 hours.  

For LED fast-charging models, the first indicator light turns green during fast charging.  
For models with a power display, a green lightning bolt icon appears while fast charging.

The number of charges you can get depends on your phone’s battery size and the power bank’s efficiency. Here’s a general estimate:

- 10,000mAh Power Bank  
If your phone battery is around 3,000mAh, it can charge about 1-2 times.

- 20,000mAh Power Bank  
If your phone battery is around 3,000mAh, it can charge about 3-4 times.

⚠ Actual charges may vary based on phone usage and power bank wear.

Battery Capacity (mAh)  
- Refers to the internal battery’s total charge, measured in milliampere-hours (mAh).  
- Examples: 10,000mAh, 20,000mAh.  

Rated Capacity (Wh or mAh)  
- This is the actual usable capacity available to charge your devices. Since the internal battery (usually 3.7V) needs to be boosted to 5V for USB output, some energy is lost during this conversion.  
- Rated capacity is typically lower than the battery capacity. For example, a 20,000mAh power bank might have a rated capacity of around 12,000mAh (at 5V).  
💡 Simply put, battery capacity is the total energy stored inside the power bank, while rated capacity is the actual power you can use to charge your devices.

You can bring power banks on planes as long as they follow airline rules:  
- Under 100Wh (like 10,000mAh/38.5Wh or 20,000mAh/74Wh) are allowed without restrictions.  
- Between 100Wh and 160Wh require airline approval, and you can carry up to two.  
- Over 160Wh are not permitted.  
- Check your airline’s specific regulations for details.  
⚠ Power banks must be carried in your carry-on bag—they cannot go in checked luggage!

Please note the following tips for using your power bank abroad:  
- Power bank compatibility: Our power banks support the universal USB charging standard (100-240V), so they can be used in most countries.  
- Different plug types: Since outlet types vary by country, you may need a plug adapter to charge your device properly.

Most power banks have a built-in four LED lights indicator to let you know whether your power bank is full charged. Here is how the LEDs show the remaining power:

4 LED lights indicator : It is charged between 75%-100% and charging. 
3 LED lights indicator : It is charged between 50%-75%  and charging.
2 LED lights indicator : It is charged between 25%-50%  and charging.
1 LED lights indicator:  It is charged about 25% or < 25% and charging.