12 Best 18650 Power Bank for 2024

Mobile Accessories

Introducing the ultimate guide to the "12 Best 18650 Power Banks for 2023." In an increasingly digital world, having a reliable power bank is essential for keeping our devices charged on the go. With countless options available on the market, it can be overwhelming to choose the perfect one. However, fear not! Our expert content writers have diligently researched and handpicked the top 12 18650 power banks to help you make an informed decision. Whether you're a frequent traveler, outdoor enthusiast, or simply someone who values convenience, this comprehensive list will provide you with the best options to meet your charging needs in 2023 and beyond.

 

The LHIABNN DIY Power Bank is a compact and lightweight external battery pack that allows you to make your own power bank using loose 18650 batteries. With two output ports and three input options (Micro, Type C, Lighting), this power bank offers convenience and versatility. The plastic case is easy to install and uninstall, making it suitable for on-the-go use. However, once the case is closed, it is difficult to reopen, making it a single-use device. The black color and sleek design add to its appeal. While it may not be the fastest at charging, this power bank gets the job done. It is perfect for DIY enthusiasts and those looking for an affordable option to repurpose their spare batteries.

Key Features

  • Size: 17x8x2.3cm
  • Material: Plastic
  • Compact and lightweight design
  • Easy to install and uninstall
  • Convenient take and use
  • Specifications

  • Color: Black
  • Pros

  • Allows you to reuse loose 18650 batteries
  • Two output ports and three input options for versatility
  • Compact and lightweight design for easy carrying
  • Affordable option for making your own power bank
  • Cons

  • Once closed, it cannot be reopened without damage
  • Not the fastest at charging
  • Limited to USB A output, no USB C output
  • May not fit batteries with overcurrent protection
  •  

    The LHIABNN DIY Power Bank offers a convenient and affordable solution for repurposing loose 18650 batteries. With its compact design and easy installation, it is perfect for DIY enthusiasts. While it may not be the fastest at charging and lacks a USB C output, it gets the job done for most users. The single-use nature of the device, once closed, may be a drawback for some. Overall, if you have spare batteries lying around and want to create your own power bank, this product is worth considering.

     

    The Smala 5X18650 Power Bank Case is a versatile charging solution that allows you to create your own power bank. With a fast charging version, it automatically adjusts the power and current according to your device's needs. The detachable design makes it easy to install and remove 5 18650 batteries, offering you great flexibility. The battery terminal charging current can reach up to 5.0A, and it supports adaptive charge current regulation. The synchronous switch discharge ensures high efficiency, with up to 95% support compensation. This power bank case is designed in a sleek black color and features an anti-reverse function for added safety.

    Key Features

  • Fast Charging Version
  • Battery: 5*18650 (Batteries not included)
  • Can install 5 18650 batteries
  • Detachable Design with anti-reverse function
  • Battery terminal charging current up to 5.0A
  • Adaptive charge current regulation
  • Synchronous switch discharge 5V 2A efficiency up to 95%
  • Supports compensation
  • Specifications

  • Color: Black
  • Dimension: 5.12Lx3.15Wx1.18H
  • Size: A
  • Pros

  • Fast charging capabilities
  • Easy installation and removal of batteries
  • High battery terminal charging current
  • Adaptive charge current regulation for optimal charging
  • Efficient synchronous switch discharge
  • Sleek design with anti-reverse function
  • Cons

     

    The Smala 5X18650 Power Bank Case offers great convenience and flexibility for creating your own power bank. With its fast charging capabilities and adaptive charge current regulation, it ensures efficient and optimized charging for your devices. The detachable design and anti-reverse function provide ease of use and added safety. Its sleek black color adds a touch of style. Whether you’re on the go or in need of extra power, this power bank case is a reliable and practical choice. Create your own power bank with the Smala 5X18650 Power Bank Case and never run out of battery again!

     

    The XBERSTAR 18650 Power Bank case is a high-quality battery holder case with wire leads for easy soldering and connecting. It comes with a case cover to keep the battery securely in place. The installation is easy and simple, and no additional tools are required. The battery can be easily installed by following the positive and negative sides on the circuit board. However, it is important not to mix good and poor batteries to ensure optimal performance. The product comes with a 3S 40A BMS, a US charger, an 18650 Li-Ion Battery Holder, and pure nickel strip. Please note that batteries are not included. The XBERSTAR 18650 Power Bank case is available in set1 color.

    Key Features

  • High quality battery holder case with wire leads
  • Comes with a case cover for easy installation
  • Includes 3S 40A BMS, US charger, 18650 Li-Ion Battery Holder, pure nickel strip
  • Easy and simple to use and operate
  • Attention: Do not mix good and poor batteries
  • Specifications

  • Color: Set1
  • Pros

  • High quality and durable construction
  • Comes with necessary accessories for DIY power bank
  • Easy installation process
  • Cons

  • Lack of detailed instructions
  • Difficult to fit wires and battery inside the box
  • Missing chargers in some kits
  •  

    Overall, the XBERSTAR 18650 Power Bank case is a decent product for DIY enthusiasts looking to create their own power supply. It offers a high-quality battery holder case with easy installation and comes with essential accessories. However, the lack of detailed instructions and some missing parts reported by customers can be frustrating. It is recommended for those with prior knowledge or experience in handling such DIY projects. With its durable construction and convenient features, the XBERSTAR 18650 Power Bank case can be a useful addition to your DIY toolkit.

     

    The Smala 21X18650 Battery Storage Box is a versatile power bank case that provides efficient charging capabilities and convenient portability. With its digital power display, you can easily monitor the remaining power and charge your devices more effectively. The box can hold up to 21 18650 flat-head batteries, making it ideal for those with higher charging needs. It can also function as a power bank with the built-in battery, and the wireless charging version eliminates the need for a charging cable. The DIY mobile power kit allows for larger battery capacity and durability to solve your charging problems. With the included lanyard, you can easily carry it wherever you go. Quick Charge + Wireless Charge Version Maximum Power: 5V-3A 9V-2A 12V-1.5A 3.4V-5.5V-5A, Wireless Charging: 15w.

    Key Features

  • Digital display with power
  • Detachable and welding-free
  • Anti-reverse connection protection
  • Can charge 21 18650 flat-head batteries
  • Can be used as a power bank
  • Wireless fast charging option available
  • Power display for monitoring remaining power
  • Equipped with 3 charging interface types
  • DIY mobile power kit for larger battery capacity
  • Comes with a convenient lanyard
  • Specifications

  • Color: Black
  • Dimension: 7.09Lx4.72Wx3.94H
  • Pros

  • Versatile charging capabilities
  • Digital power display for monitoring
  • Large battery capacity with DIY kit
  • Portable with included lanyard
  • Cons

     

    The Smala 21X18650 Battery Storage Box offers a practical solution for those in need of efficient and versatile charging. With its ability to hold 21 flat-head batteries and provide power bank functionality, it is perfect for users with demanding charging needs. The option for wireless fast charging eliminates the hassle of cables. The digital power display ensures you never run out of power at critical moments. The DIY mobile power kit allows for customization and increased battery capacity. Overall, the Smala 21X18650 Battery Storage Box is a reliable and convenient charging companion.

     

    The Cuifati Power Bank Kit DIY is a versatile and efficient power bank shell case that allows you to create your own power bank. With fast charging capabilities, dual USB output ports, and high efficiency, this power bank case is compatible with various devices. It supports PD2.0 and PD3.0 input/output protocols and can provide different voltage gears. The DIY Type C Power Bank Case is designed for fast charging with BC1.2, Apple, and Samsung cellphones. Its compact size and sturdy build make it a reliable choice for powering up your devices on the go.

    Key Features

  • Fast Recharge: Up to 5.0A battery charging current
  • Dual Charging: 2 USB output ports for simultaneous charging
  • High Efficient: Up to 95% efficiency
  • Widely Compatibility: Compatible with fast charging for BC1.2, Apple, and Samsung cellphones
  • Supported Protocols: PD2.0, PD3.0, PPS output protocol
  • Specifications

  • Color: Default
  • Dimension: 5.71Lx2.95Wx0.98H
  • Size: 1 Count (Pack of 1)
  • Pros

  • Fast charging capability
  • Dual USB ports for simultaneous charging
  • High efficiency
  • Widely compatible with various devices
  • Supports different voltage gears
  • Cons

  • Difficult to open the case once closed
  • Quality control issues reported
  • May need initialization for accurate battery percentage display
  •  

    The Cuifati Power Bank Kit DIY offers an innovative and practical solution for creating your own power bank. With its fast charging capabilities, dual USB output ports, and compatibility with various devices, it provides convenience and efficiency. Although there are some issues with case opening and quality control, the overall performance and features of this power bank case make it a worthwhile purchase for those looking to customize their power bank. While considering the minor drawbacks, it remains a reliable and durable option for keeping your devices charged on the go.

     

    The Hilitand 8×18650 Battery Box Automatic Identification of Charging No Welding Jacking DIY Power Bank Shell Kit is a versatile accessory for mobile phone users. With its DIY installation, users can enjoy the fun of creating their own power bank. The battery box is easy to install and use, offering practicality and high reliability. It comes in two different colors, allowing users to choose according to their preference. The box is made of high-quality materials, ensuring good performance and a long service time. It supports all models of mobile phone charging, providing convenience for users. However, some customers have experienced issues with the charging speed and the difficulty of disassembling the box. Despite these drawbacks, the Hilitand 8×18650 Battery Box receives a customer rating of 4.1 out of 5.

    Key Features

  • DIY installation, enjoy the fun of DIY
  • Easy to install and use, very practical, high reliability
  • 2 different colors for you to choose, meet your different needs
  • High quality, good performance, long service time
  • Supports all models of mobile phone charging
  • Specifications

  • Color: Black
  • Dimension: 0.00Lx0.00Wx0.00H
  • Pros

  • DIY installation provides an enjoyable experience
  • High-quality materials ensure good performance
  • Supports charging for all models of mobile phones
  • Cons

  • Charging speed may be slower than specified
  • Difficult to disassemble once closed
  • May not be suitable for certain DIY projects
  •  

    The Hilitand 8×18650 Battery Box is a useful accessory for those who enjoy DIY projects and need a versatile power bank for their mobile phones. It offers the convenience of supporting all mobile phone models and is made of high-quality materials, ensuring good performance and durability. However, customers should be aware of the potential issues with charging speed and the difficulty of disassembling the box. Overall, the Hilitand 8×18650 Battery Box provides a practical solution for mobile phone users in need of a customizable power bank.

     

    The ACEIRMC 3pcs 3S 12.6V 6A BMS Lithium Battery Protection Board is a reliable and efficient solution for protecting your lithium batteries. With multiple protections including over-discharge, overcurrent, and overcharge, this board ensures the longevity and safety of your batteries. It has a high charge and discharge current, making it suitable for electric drills, motorbikes, and power banks. The board features a 3S 12.6V 6A BMS Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module, which offers overcharge and overdischarge protection. It operates at a charging voltage range of 12.6-13V and has an upper operating current of 8A. Overall, the ACEIRMC Battery Protection Board is a dependable solution for protecting and balancing your lithium batteries.

    Key Features

  • Multiple Protections: Over-discharge protection, overcurrent protection, overcharge protection; High charge and discharge current
  • 3S 12.6V 6A BMS Li-ion Lithium Battery Protection Board PCB BMS Charger Protection Circuit Balance Charging Module for Drill Motor Motorcycle Battery
  • Upper transient current: 40A±5A, overcharge range: 4.25±0.05V, overdischarge range: 2.5±0.05V
  • Charging voltage: 12.6-13V, upper operating current: 8A
  • Function: overcharge/overdischarge/short circuit/overcurrent protection
  • Specifications

  • N/A
  • Pros

  • Multiple protections ensure battery safety
  • High charge and discharge current for efficient performance
  • Suitable for various applications: electric drills, motorbikes, power banks
  • Cons

  • Limited specifications information provided
  •  

    Overall, the ACEIRMC 3pcs 3S 12.6V 6A BMS Li-ion Lithium Battery Protection Board is a reliable choice for safeguarding and balancing your lithium batteries. With its multiple protections and high charge/discharge current, it ensures the longevity and efficiency of your battery-powered devices. Although specifications are lacking, the board’s functionalities, such as overcharge, overdischarge, short circuit, and overcurrent protection, make it suitable for a variety of applications including electric drills, motorbikes, and power banks. If you’re in need of a dependable battery protection board, the ACEIRMC 3S 12.6V 6A BMS Li-ion Lithium Battery Protection Board is worth considering.

     

    The Misaso 21X18650 Battery Storage Box is a versatile and durable mobile power kit that can solve all your charging problems. With its larger battery capacity, it is suitable for people with greater charging needs. The box comes with three different charging interfaces, including Type-C, allowing you to charge various devices. The built-in power display lets you check the remaining battery power at any time. This DIY mobile power kit is easy to assemble and offers anti-reverse connection protection. It can support 21 18650 flat-head batteries and can also be used as a power bank. The Quick Charge + Wireless Charge Version provides fast charging with a maximum power of 15W. With its compact size and included lanyard, you can take it with you wherever you go.

    Key Features

  • DIY mobile power kit
  • Larger battery capacity
  • Three charging interface types
  • Power display
  • Anti-reverse connection protection
  • Supports 21 18650 flat-head batteries
  • Can be used as a power bank
  • Quick Charge + Wireless Charge Version with 15W power
  • Comes with a lanyard for convenience
  • Specifications

  • Color: Black
  • Dimension: 7.09Lx4.72Wx3.94H
  • Pros

  • Versatile and durable mobile power kit
  • Large battery capacity
  • Offers multiple charging interface options
  • Power display for easy monitoring
  • Anti-reverse connection protection for safety
  • Can be used as a power bank
  • Quick charging capabilities
  • Compact and portable with included lanyard
  • Cons

     

    The Misaso 21X18650 Battery Storage Box is a reliable and convenient solution for those with higher charging needs. It offers a larger battery capacity, multiple charging interface options, and can also be used as a power bank. The power display allows you to easily monitor the remaining battery power, and the anti-reverse connection protection ensures safety during use. With its compact size and included lanyard, you can easily take it with you wherever you go. Whether you need quick charging or wireless charging, this power case has you covered. Overall, it provides a great value for its features and functionality.

     

    The 18650 USB Power Bank is a convenient and lightweight portable charger that provides on-the-go power for your mobile devices. With its compact size and fashionable appearance, it is not only great for travel but also for everyday use around the home. This power bank features overvoltage and overcurrent protection circuitry to ensure the safety of your phone and battery. It can be used with one or two 18650 batteries, offering you flexibility in charging options. The power bank has a built-in micro input port and USB output port, making it compatible with a wide range of mobile phones and other devices. With a one-year warranty and excellent customer service, this power bank provides both convenience and peace of mind.

    Key Features

  • Portable and compact design for convenience
  • Overvoltage and overcurrent protection for safety
  • Compatible with various mobile phones and devices
  • Built-in micro input port and USB output port
  • One-year warranty and excellent customer service
  • Specifications

  • Color: Black
  • Pros

  • Compact and lightweight
  • Fashionable and elegant design
  • Can be carried in pocket or suitcase
  • Versatile charging options
  • One-year warranty
  • Cons

  • Some users reported getting empty boxes
  • Not effective in charging their phones
  •  

    The 18650 USB Power Bank is a lightweight and portable solution for charging mobile devices on the go. Its compact design and compatibility with various devices make it a versatile choice. However, some users have reported receiving empty boxes and experiencing issues with charging effectiveness. Despite these drawbacks, the power bank offers a one-year warranty and excellent customer service, ensuring customer satisfaction and peace of mind. If you’re in need of a convenient and stylish power bank, this product is worth considering.

     

    The DUSC 18650 Power Bank Box is a compact and portable power bank case that offers fast charging for most mobile phones. With an LCD display, you can easily keep track of the battery level. This power bank case is compatible with all types of mobile phones and is a must-have gift. It has dual-port output and three input ports, allowing you to charge multiple devices simultaneously. The smart 18650 battery charger ensures that each battery slot is individually charged and tested. The sliding cover design makes it easy to install and uninstall the battery. This portable power bank box is plug and play, making it convenient for charging on the go. With a 100% warranty, you can shop with confidence knowing that customer satisfaction is guaranteed.

    Key Features

  • LCD display to track battery level
  • Dual-port output and three input ports
  • Compatible with all types of mobile phones
  • Individual charging for each battery slot
  • Small, lightweight, and portable design
  • Specifications

  • N/A
  • Pros

  • LCD display for easy battery level monitoring
  • Dual-port output and multiple input ports
  • Compatible with all types of mobile phones
  • Smart individual battery charging
  • Compact and lightweight for portability
  • Plug and play for convenient use
  • Cons

  • Batteries not included
  • Difficult to find compatible lithium batteries
  •  

    The DUSC 18650 Power Bank Box is a versatile and convenient power bank case that offers fast charging for most mobile phones. With its LCD display and multiple input/output ports, it provides a user-friendly experience. The individual battery charging and compact design make it a reliable companion for traveling or everyday use. However, the lack of included batteries and the challenge of finding compatible ones may pose a drawback for some users. Overall, this power bank case delivers on its promises and is worth considering for those in need of a reliable charging solution on the go.

     

    The 2×18650 DIY Power Bank is a safe, fashionable, and reliable portable charger for smartphones. With the ability to charge your phone in an emergency or while on the move, this power bank is a convenient solution for those constantly on the go. It features overvoltage and overcurrent protection for enhanced safety and reliability. The lightweight and stylish design make it easy to carry in your pocket, purse, or briefcase. Compatible with various types of mobile phones and devices, this power bank is a versatile option. If you have any questions or concerns, the after-sales service is available to assist you, and the product comes with a 180-day free return option. Stay connected and never run out of battery with the 2×18650 DIY Power Bank.

    Key Features

  • Emergency charging without fixed power supply
  • Safe and reliable with overvoltage and overcurrent protection
  • Lightweight and convenient for travel
  • Wide range of applications for various devices
  • After-sales service and 180-day free return
  • Specifications

  • Color: White
  • Pros

  • Emergency charging option
  • Enhanced safety features
  • Compact and travel-friendly
  • Versatile compatibility with different devices
  • Responsive after-sales service
  • Cons

  • Limited color options
  •  

    The 2×18650 DIY Power Bank is a reliable and portable solution for charging your smartphone on the go. Its emergency charging capability and safety features make it a practical choice. The lightweight design and wide compatibility add to its appeal, making it suitable for various devices. The after-sales service and free return option provide customers with peace of mind. The only drawback is the limited color options. Overall, if you need a power bank to keep your phone charged during emergencies or while traveling, the 2×18650 DIY Power Bank is a great option to consider.

     

    The AUHX 2×18650 DIY Power Bank Box is a reliable and portable power bank for smartphones. It features a fashionable and professional design, providing a lightweight and elegant solution for charging on the go. With overvoltage and overcurrent protection, it ensures the safety of both your phone and battery. The power bank is perfect for emergency charging, allowing you to charge your phone anytime and anywhere. It is compatible with various mobile phones and can also charge other devices like MP3 players, digital cameras, and tablets. Additionally, the AUHX power bank comes with a satisfaction guarantee, ensuring a 100% shopping satisfaction for every customer.

    Key Features

  • Fashionable appearance, professional design, leading fashion
  • Overvoltage and overcurrent protection circuit
  • Emergency charging without fixed power supply
  • Lightweight and convenient for travel
  • Wide range of application, suitable for various devices
  • Satisfaction guaranteed with warranty or refund
  • Specifications

  • Color: Black
  • Pros

  • Fashionable and professional design
  • Reliable protection for phone and battery
  • Portable and lightweight for travel
  • Compatible with various devices
  • Satisfaction guarantee and customer support
  • Cons

     

    The AUHX 2×18650 DIY Power Bank Box is a reliable and stylish solution for charging your smartphone on the go. Its fashionable design and lightweight construction make it a convenient accessory for business or travel. With overvoltage and overcurrent protection, this power bank ensures the safety of your phone and battery. It offers emergency charging without the need for a fixed power supply, allowing you to charge your phone anytime, anywhere. The wide range of application makes it versatile for charging other devices as well. Whether you need to charge your phone or other gadgets, the AUHX power bank delivers. With a satisfaction guarantee and excellent customer support, this power bank is a worthwhile investment.

     

    18650 Power Bank Buyer's Guide

    Congratulations on recognizing the importance of a reliable power bank! With the increasing dependence on smartphones, tablets, and other portable devices, it's essential to have a trustworthy source of power on the go. To assist you in making an informed decision, here's a comprehensive buyer's guide for 18650 power banks.

    Key Factors to Consider

    When choosing an 18650 power bank, keep the following factors in mind:

    1. Capacity: Determine the capacity you need based on your device's battery size. Higher capacity power banks provide more charges, but they are usually bulkier and heavier.
    2. Cell Quality: Opt for power banks with high-quality 18650 cells that deliver stable power output and ensure longevity.
    3. Output Ports: Consider the number and types of output ports required to charge your devices simultaneously. Look for both USB ports and other variants such as USB-C or Lightning.
    4. Input Charging Options: Check the charging options available for the power bank. Some might support fast charging or have multiple input ports (USB-C, micro USB).
    5. Safety Features: Prioritize power banks with built-in protection mechanisms like overcharge, overcurrent, and short-circuit protection to prevent potential damage to devices.
    6. Size and Weight: Evaluate the portability of the power bank depending on your usage scenarios. If you often carry it in a pocket or bag, a compact and lightweight option might be preferable.
    7. Brand Reputation: Consider trusted brands known for producing reliable power banks with positive customer reviews.
    8. Price: Determine your budget by balancing the desired features with cost.

    Pros of 18650 Power Banks

    • Wide availability and compatibility with various devices.
    • Often offer higher capacities compared to non-18650 power banks.
    • Replaceable or interchangeable batteries allow for easy replacement in case of battery degradation.
    • Flexibility to use the 18650 batteries separately for other purposes (flashlights, vape mods, etc.).

    Cons of 18650 Power Banks

    • Slightly bulkier and heavier compared to power banks with non-removable battery designs.
    • Requires regular maintenance, such as periodic replacement of 18650 batteries.
    • Risk of using counterfeit or low-quality 18650 cells in certain power banks.

    Important Safety Reminders

    While using an 18650 power bank, keep in mind:

    • Always use a dedicated charger or USB power source to charge the power bank.
    • Avoid exposing the power bank to extreme temperatures (both heat and cold).
    • Store the power bank in a cool and dry place.
    • Do not disassemble or attempt to repair the power bank by yourself.
    • Keep the power bank away from children.

     

    FAQs

    Q: Can I charge a laptop with an 18650 power bank?
    A: It depends on the power bank’s voltage and capacity. Some high-capacity 18650 power banks may offer a voltage and connector compatibility with certain laptops, but most are primarily designed for smaller devices like smartphones and tablets.

    Q: How long does it take to charge an 18650 power bank fully?
    A: The charging time varies depending on the power bank’s capacity and the input charging speed. As a general rule, it may take anywhere from a few hours up to 8-12 hours for a full charge. Some models offer fast charging for reduced charging time.

    Q: Can an 18650 power bank explode?
    A: While rare, there is a risk of explosion if the power bank is damaged, exposed to extreme temperatures, or if counterfeit or low-quality 18650 cells are used. Choosing a reputable brand and following safety guidelines significantly reduces the risk.

    Q: Are all 18650 batteries the same?
    A: No, there can be variations in quality, capacity, and performance among different 18650 batteries. It’s essential to choose power banks that use high-quality 18650 cells and avoid purchasing counterfeit batteries.

    Q: Can I carry an 18650 power bank on an airplane?
    A: Before traveling, check the specific regulations of your airline. In general, power banks with capacities exceeding a certain limit (typically 100Wh or 27,000mAh) may not be allowed in carry-on or checked baggage due to safety concerns.

    Q: Are solar charging options available for 18650 power banks?
    A: Yes, there are some 18650 power banks equipped with a solar panel for recharging the internal batteries. However, the solar charging feature may have limitations in terms of speed and efficiency, so it’s important to manage expectations accordingly.

    Q: Is it safe to leave an 18650 power bank plugged in overnight?
    A: Most modern power banks are equipped with safety mechanisms to prevent overcharging. While it is generally safe to leave them plugged in overnight, it is advisable to unplug once fully charged to prolong the overall lifespan of the battery.

    Q: How long can I expect an 18650 power bank to last?
    A: The lifespan of an 18650 power bank depends on various factors, including usage patterns, charging and discharging cycles, and overall quality. With proper care, high-quality power banks can last for several years.

    Q: Should I keep my devices connected to the power bank even after they are fully charged?
    A: It is generally recommended to disconnect devices from the power bank once they are fully charged. Continuous connection can strain the power bank’s battery and reduce its overall efficiency and lifespan.

    Q: Can I charge a power bank from another power bank?
    A: In some cases, it is possible to charge a power bank using another power bank as the power source. However, not all power banks support this feature, so refer to the manufacturer’s instructions and specifications to determine if it is feasible.