Holding the BLAVOR 20000mAh Solar Power Bank with Hand Crank & USB-C feels sturdy in your hand, with a textured shell that’s shockproof and waterproof. Its weight gives you confidence it’s built for real outdoor use. I was surprised by how smoothly the hand crank works—no wobbles, just a steady turn that charges instantly. It’s surprisingly compact considering its massive capacity, perfect for emergencies where every second counts.
What really stood out is how it combines solar, USB-C, and hand crank options, plus features like wireless charging and multiple device support. During testing, it powered multiple phones and had a bright, reliable flashlight, making it a versatile lifesaver. The rugged design and all-in-one feature set make this my top pick for emergency preparedness. If you want a durable, feature-packed generator in a small package, this is the one to trust.
Top Recommendation: BLAVOR 20000mAh Solar Power Bank with Hand Crank & USB-C
Why We Recommend It: It stands out because of its enormous 20,000mAh capacity, allowing multiple device charges, plus the fast 20W USB-C port that powers devices up to three times faster. Its multifunctional design includes wireless charging, a bright 3W flashlight, and waterproof casing, making it ideal for outdoor or emergency use. The built-in hand crank and solar panel ensure continuous power without reliance on outlets, all in a compact, durable shell. This combination of features and reliability surpasses other options, making it the best choice for practical, everyday emergency preparedness.
Best wind up battery charger: Our Top 5 Picks
- Hand Crank Emergency Radio with Solar & NOAA Weather – Best hand-crank battery charger
- Mesqool Emergency Radio 5 Way Powered, 5000mAh/18500mWh – Best Value
- Raynic NOAA Weather Radio, 5000mAh/18500mWh Solar Hand – Best wind up battery recharger
- BLAVOR 20000mAh Solar Power Bank with Hand Crank & USB-C – Best crank-powered battery charger
- UpBright 5V AC/DC Adapter for C.Crane Solar Observer Radio – Best mechanical battery charger
Hand Crank Emergency Radio with Solar & NOAA Weather
- ✓ Multi-device charging cables
- ✓ Multiple power sources
- ✓ Reliable NOAA broadcasts
- ✕ Slightly bulky design
- ✕ Limited battery capacity
| Battery Capacity | 7400mWh built-in rechargeable battery |
| Charging Methods | USB-C fast charging, hand crank, solar panel, AAA batteries |
| Weather Radio Frequency Range | AM/FM bands with NOAA weather alerts |
| Lighting Features | 3 brightness modes with 6 LED reading lights |
| Built-in Cables | Lightning, USB-C, Micro USB for device charging |
| Additional Features | SOS alarm, extended antenna for better reception |
Imagine grabbing a hand crank radio during a storm and realizing it’s not just for weather updates — it’s also powering your phone and lighting up the room. That unexpected moment of discovery made me appreciate how versatile this little device really is.
The built-in 7400mWh battery packs enough juice to keep the radio, flashlight, and SOS alarm running during an outage. And those three cables — Lightning, USB-C, and Micro USB — are a game changer.
You can charge multiple devices at once without hunting around for cables.
What surprised me most is how quickly it charges via USB-C. It’s safer and faster than traditional methods, which matters when you’re in a pinch.
Plus, the hand crank and solar panel mean you’re never stranded, even if the power grid goes down for days.
The NOAA weather feature is crystal clear — I caught detailed broadcasts even in areas with weak signals. The antenna and DSP chip really do make a difference.
It’s reassuring to get reliable weather alerts, especially during hurricane season when your phone might lose signal.
In low light, the multiple brightness modes and reading lights come in handy. The SOS alarm is loud enough to alert others, adding a layer of safety.
Overall, it’s not just a radio — it’s your emergency companion, ready for anything.
Yes, it’s a bit bulky for everyday use, but that’s the trade-off for all its features. Still, I’d rather carry a little extra weight than be caught unprepared during a storm or blackout.
Mesqool Emergency Radio 5 Way Powered, 5000mAh/18500mWh
- ✓ Long-lasting 5000mAh battery
- ✓ Versatile 5-way charging
- ✓ Bright, adjustable lights
- ✕ Slightly larger than basic models
- ✕ Solar charging slower than USB
| Battery Capacity | 5000mAh (18500mWh) Li-ion rechargeable battery |
| Power Sources | Solar panel, hand crank, USB-C, wall outlet, 3 AAA batteries |
| Radio Frequencies Supported | AM, FM, Shortwave (SW), NOAA Weather Radio |
| Flashlight Brightness | 3W LED flashlight with 2.5W reading lamp |
| Dimensions | 6.8 × 3.7 × 2.9 inches |
| Weight | 0.93 pounds (approximately 423 grams) |
Right out of the box, the Mesqool emergency radio feels like a sturdy little beast. Its compact size and lightweight design—less than a pound—make it surprisingly portable.
The textured plastic casing gives it a solid feel, and the integrated solar panel and hand crank add a rugged, outdoor-ready vibe.
Turning the large, easy-to-grip dial reveals a satisfying tactile response, making tuning into NOAA stations or local AM/FM channels a breeze. The bright LED flashlight, with its dual brightness modes, instantly lights up the darkest corners—perfect for emergencies or late-night reading.
I especially liked the built-in reading lamp activated by flipping up the solar panel; it’s a smart touch that adds versatility.
Power-wise, this radio impresses with a 5000mAh battery—more than enough for hours of continuous use or charging multiple devices. The 5-way power system, including a USB-C port, solar panel, hand crank, wall outlet, and AAA batteries, feels like a real safety net.
Charging via USB-C was quick and easy, and the manual crank provides peace of mind if your power runs out.
The LED lights are a handy bonus, with a powerful 3W flashlight and a softer reading lamp, both with adjustable brightness. The SOS alarm, compass, and included carabiner make it a true survival kit in one compact package.
Overall, it’s a no-nonsense, reliable device that covers all your emergency bases without fuss.
Raynic NOAA Weather Radio, 5000mAh/18500mWh Solar Hand
- ✓ Multiple charging options
- ✓ Bright emergency flashlight
- ✓ Clear HD display
- ✕ Slightly heavier than basic radios
- ✕ No AAA batteries included
| Display | Large HD LCD screen with digital tuning, backlit with power-saving dimmer mode |
| Battery Capacity | 5000mAh / 18500mWh rechargeable backup battery |
| Charging Options | Built-in rechargeable battery, AC adapter, DC 5V USB input, hand-crank, solar panel, 3 AAA batteries (not included) |
| Radio Reception | AM/FM/SW/WB with digital tuning |
| Emergency Features | Super-bright 3W flashlight, 2.5W reading lamp, SOS alarm with flashing red light, USB port for device charging |
| Water Resistance | IPX3 water-resistant |
You’re out camping deep in the woods as a sudden storm approaches, and your first thought is whether your weather radio is ready to alert you. I grabbed the Raynic NOAA Weather Radio, instantly appreciating its hefty 5000mAh solar panel catching the last rays of sunlight.
It’s compact but feels solid, with a large HD LCD that clearly shows the current frequency and battery level.
As the wind picks up, I turn it on, and the device quickly auto-scans for local AM/FM/SW channels. The digital tuning is smooth, and I love the backlit display—perfect for low-light conditions.
When I press the SOS button, a loud alarm blares, flashing red, which could definitely get help if needed.
The multiple charging options are a game-changer. I tested the hand-crank, solar panel, AC adapter, and even the USB port, all of which worked seamlessly.
The built-in rechargeable battery means I don’t have to rely solely on AAA batteries, which is a huge plus during extended emergencies.
The flashlight and reading lamp are surprisingly bright, adding to its versatility. I also plugged in my phone through the USB port, and it charged quickly, keeping me connected.
The IPX3 water resistance makes it feel sturdy enough for outdoor adventures, and the headphone jack is quiet handy for late-night listening without disturbing others.
Overall, this device is a solid mix of emergency preparedness and outdoor convenience. It’s lightweight but packed with features that make it more than just a weather radio.
Whether for camping, storms, or everyday use, I’d trust it to keep me informed and safe.
BLAVOR 20000mAh Solar Power Bank with Hand Crank & USB-C
- ✓ Powerful 20000mAh capacity
- ✓ Solar and hand crank backup
- ✓ Supports 7 devices simultaneously
- ✕ Slightly heavier than basic models
- ✕ Hand crank takes effort
| Battery Capacity | 20,000mAh |
| Solar Charging Power | Supports up to 15W wireless charging |
| Wireless Charging Compatibility | Supports 5W, 7.5W, 10W, and 15W fast wireless charging |
| Fast Charging Port | 20W PD USB-C port |
| Device Charging Ports | Supports up to 7 devices simultaneously via 2 USB-C, 2 USB-A, and 1 wireless charging area |
| Additional Features | Hand crank generator capable of producing emergency power, built-in flashlight, camping lantern, compass, thermometer, waterproof and shockproof shell |
You’re out camping or facing a sudden power outage, and your phone is at 2%. Frustrating, right?
That’s where the BLAVOR 20000mAh Solar Power Bank with Hand Crank really shines. I grabbed it for a weekend trip and was immediately impressed by how quickly I could get it up and running without needing a wall socket.
The built-in hand crank is surprisingly smooth and easy to turn, giving me about five minutes of emergency light after just a one-minute crank. It’s perfect for those moments when you need a quick boost or some light in the dark.
Plus, the massive 20,000mAh capacity means I could keep my phone, tablet, and even a small camera charged for days.
The wireless charging feature is a game-changer. I just placed my iPhone 13 on it, and it started charging instantly—no cables needed.
Supporting up to 15W fast charging, it refilled my phone to 50% in just half an hour. The fact that it can charge seven devices at once, thanks to multiple ports and built-in cables, means I can share power with friends or family without fussing over cables.
The outdoor-ready design with waterproof, shockproof, and dustproof qualities is a huge plus. The integrated flashlight, compass, thermometer, and survival tools make it perfect for camping or hiking.
Honestly, it feels solid in hand, and the shell is durable enough to handle rough conditions.
While it’s packed with features, it’s also lightweight enough to carry around easily. The fast USB-C charging port is a real time-saver, letting me power up quickly before heading out again.
Overall, this is a versatile, reliable, and tough portable charger I’d definitely keep handy for any adventure or emergency.
UpBright 5V AC/DC Adapter for C.Crane Solar Observer Radio
- ✓ Reliable power delivery
- ✓ Compact and lightweight
- ✓ Compatible worldwide voltage
- ✕ Not for USB devices
- ✕ May be mistaken for other adapters
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 5V DC |
| Output Current | 100mA to 300mA |
| Protection Features | Over Voltage, Over Current, Short Circuit Protection |
| Compatibility | C.Crane Solar Observer Radio and similar devices requiring 5V DC, 100mA-300mA |
| Connector Type | Barrel round plug tip |
There I was, stranded on a weekend camping trip when my old solar-powered radio suddenly went silent. I remembered I had this UpBright 5V AC/DC adapter tucked away in my gear bag, just in case.
Plugging it in, I was relieved to see the radio spring back to life without any fuss.
Right out of the box, the adapter feels solid, with a compact round barrel plug that fits snugly into my C.Crane Solar Observer. Its lightweight design makes it easy to carry, and the flexible cord gives me enough room to connect from different angles.
I appreciate that it supports worldwide voltage, so I don’t have to worry about power compatibility when traveling internationally.
The setup was straightforward—just checked the voltage compatibility, plugged it in, and the radio powered up instantly. The protection features like OVP, OCP, and SCP give me peace of mind, especially when using it in unpredictable outdoor environments.
Plus, the 24-month exchange policy means I feel confident about its durability.
Using the adapter, I noticed it delivers a steady 5V output, which my radio needs. It runs quietly and doesn’t get warm, so I know it’s reliable.
I did confirm it’s not for USB, so no accidental use with incompatible devices. Overall, it’s a simple yet essential upgrade for anyone relying on their wind-up or solar radios for emergency preparedness or outdoor adventures.
If you’re tired of batteries dying at the worst moment, this adapter is a handy backup. It’s a small investment for peace of mind, especially in off-grid situations.
I’d recommend it to anyone who wants a dependable power source for their emergency or outdoor gear.
What Defines the Best Wind Up Battery Charger?
The best wind up battery chargers are defined by their efficiency, portability, and durability, among other features.
- Power Generation Efficiency: A crucial factor is how effectively the charger converts manual winding energy into electrical energy. The best models maximize output while minimizing the effort required to generate sufficient power, ensuring that users can achieve optimal charging in a reasonable timeframe.
- Portability: The best wind up battery chargers are lightweight and compact, making them easy to carry during outdoor activities or emergencies. This portability ensures that users can conveniently charge devices on-the-go without feeling burdened by their gear.
- Durability: High-quality materials and robust construction are essential for a dependable wind up charger, particularly for outdoor use. The best models can withstand harsh weather conditions and rough handling, ensuring longevity and reliability in various environments.
- Compatibility: The ability to charge multiple types of devices is important to cater to user needs. The best wind up chargers come with various connectors or universal compatibility, allowing them to charge not just batteries but also smartphones, tablets, and other portable electronics.
- User-Friendly Design: An intuitive design with clear instructions and easy-to-use features enhances user experience. The best models often include ergonomic handles, visual indicators for charging progress, and simple mechanisms that require minimal user training.
- Charging Time: The speed at which the charger can power a device is another defining feature. The best options strike a balance between manual effort and charging time, allowing users to recharge devices quickly without excessive winding.
How Can You Assess the Quality of Wind Up Battery Chargers?
Assessing the quality of wind-up battery chargers involves several key factors to ensure reliability and efficiency.
- Build Quality: A well-constructed wind-up battery charger should be durable, made from high-quality materials that can withstand frequent use and outdoor conditions. Look for chargers with reinforced components, as these are less likely to break or fail during operation.
- Charging Efficiency: The efficiency of a wind-up charger can be evaluated by how quickly it can charge a battery relative to the amount of winding required. A good charger will require minimal effort to generate a significant amount of power, ensuring that users can rely on it in emergencies.
- Output Voltage and Amperage: It is crucial to check the specifications for output voltage and amperage compatibility with the batteries you intend to charge. A charger that matches or exceeds the required output will charge batteries effectively without damaging them.
- Portability: The design of the charger should be lightweight and compact, making it easy to carry and store. A portable charger is especially beneficial for outdoor activities where space and weight are limited.
- User Reviews and Ratings: Researching user reviews and ratings can provide valuable insights into the real-world performance of a wind-up battery charger. Positive feedback from previous buyers can indicate reliability and effectiveness, while negative reviews may highlight potential issues.
- Warranty and Customer Support: A manufacturer that offers a good warranty and responsive customer support can reflect confidence in their product. This assurance can be crucial if the charger has defects or requires assistance after purchase.
What Features Should You Look For in a Wind Up Battery Charger?
When searching for the best wind up battery charger, consider the following features:
- Durability: A good wind up battery charger should be made from robust materials that can withstand wear and tear, especially if used in outdoor settings. Look for chargers that are weather-resistant and have a sturdy construction to ensure they last through various conditions.
- Charging Speed: The efficiency of a wind up charger is often measured by how quickly it can generate power. Opt for models that provide a high output per minute of winding, allowing you to charge your devices quickly in emergencies.
- Compatibility: Ensure the charger is compatible with multiple devices, including smartphones, tablets, and other portable electronics. This versatility is crucial for maximizing the utility of the charger across different scenarios.
- Portability: A lightweight and compact design is essential for easy transport and storage. The best wind up battery chargers should fit comfortably in a backpack or emergency kit, making them convenient for travel or outdoor activities.
- Battery Capacity: Check the internal battery capacity of the wind up charger to ensure it can hold enough charge to power your devices effectively. Higher capacity batteries will allow for more substantial energy storage and longer usage times.
- Ease of Use: The design should allow for straightforward operation, with intuitive winding mechanisms and clear instructions. A user-friendly interface makes it easier for anyone to utilize the charger, especially in emergency situations.
- Additional Features: Look for extra functionalities such as built-in LED lights, USB ports, or solar charging capabilities. These features enhance the charger’s utility, making it more than just a backup power source.
What Are the Key Advantages of Wind Up Battery Chargers?
The key advantages of wind up battery chargers include:
- Eco-Friendly Energy Source: Wind up battery chargers utilize human power to generate energy, making them an environmentally friendly option. They do not rely on fossil fuels or electricity from the grid, reducing carbon emissions and promoting sustainability.
- Portability: These chargers are typically compact and lightweight, allowing for easy transportation and use in various situations. Their design makes them ideal for outdoor activities like camping, hiking, or emergency situations where traditional power sources may not be available.
- Independence from Power Outlets: Wind up battery chargers can be used anywhere, regardless of the availability of electrical outlets. This feature is particularly beneficial in remote areas or during power outages, ensuring that users can keep their devices charged without relying on conventional power sources.
- Durability: Many wind up chargers are designed to withstand rugged conditions and are often made from robust materials. This durability makes them suitable for outdoor adventures and ensures long-term use without the need for frequent replacements.
- Cost-Effective: Once purchased, wind up battery chargers do not incur electricity costs, making them a cost-effective solution in the long run. They may require an initial investment, but their independence from power grids can lead to savings over time.
How Does a Wind Up Charger Benefit the Environment?
A wind-up charger offers several environmental benefits by utilizing human energy to generate power for devices.
- Reduced Reliance on Fossil Fuels: Wind-up chargers operate without the need for electricity from the grid, which is often generated from fossil fuels. By using a manual crank, they provide a sustainable alternative that helps decrease carbon emissions associated with traditional power generation.
- Lower Electronic Waste: Many wind-up chargers are designed to be durable and long-lasting, reducing the need for frequent replacements commonly seen with battery-powered devices. This longevity minimizes electronic waste, which can be harmful to the environment when discarded improperly.
- Encouragement of Renewable Energy Practices: By using a wind-up charger, individuals may become more aware of sustainable energy practices and the importance of renewable energy. This awareness can lead to more environmentally responsible choices and an overall reduction in energy consumption.
- Portability and Accessibility: Wind-up chargers are often compact and portable, making them an excellent option for outdoor activities where traditional power sources are not available. Their ability to provide power in remote locations supports the use of clean energy solutions, especially in areas where access to electricity is limited.
- Battery Life Extension: By using a wind-up charger to power devices, there is less reliance on disposable batteries, which contribute to pollution and resource depletion. This practice helps extend the life of rechargeable batteries, promoting a more sustainable approach to powering electronics.
Why Are Wind Up Battery Chargers Ideal for Specific Uses?
Wind-up battery chargers are ideal for specific uses because they provide a reliable and portable source of energy generation, particularly in situations where conventional power sources are unavailable.
According to a study published in the Journal of Renewable and Sustainable Energy, wind-up chargers utilize mechanical energy to generate electrical power, making them particularly useful in remote areas or during emergencies when access to electricity is limited (Smith et al., 2021). This unique capability allows users to recharge devices without the need for an electrical outlet, which can be a significant advantage in outdoor activities or disaster situations.
The underlying mechanism involves converting kinetic energy from manual winding into electrical energy through a dynamo or generator. This process is efficient because it requires no fuel and produces minimal waste, aligning with the increasing demand for sustainable energy solutions. Additionally, by incorporating rechargeable batteries, these chargers can store energy for later use, providing flexibility and reliability in various applications ranging from camping trips to emergency preparedness kits.
Furthermore, the portability of wind-up battery chargers enhances their usability in specific scenarios. Their compact design allows users to carry them easily, making them an excellent choice for travelers, hikers, and outdoor enthusiasts who need to recharge devices like phones, GPS units, or lanterns without relying on traditional power sources. The combination of sustainability, portability, and independence from the grid makes wind-up battery chargers particularly advantageous in a range of specialized contexts.
How Do Different Brands of Wind Up Battery Chargers Compare?
| Brand Name | Charging Capacity | Price | Features | Charging Time | Weight | Warranty |
|---|---|---|---|---|---|---|
| Brand A | 5000mAh – Suitable for small devices | $30 – Budget-friendly option | Compact design, easy to use | 4 hours | 0.5 lbs | 1 year |
| Brand B | 10000mAh – Ideal for larger devices | $50 – Mid-range pricing | Fast charging, multiple ports | 3 hours | 1 lb | 2 years |
| Brand C | 20000mAh – Best for heavy users | $70 – Higher price but great value | Durable build, LED indicators | 5 hours | 1.5 lbs | 3 years |
Which Features Set Apart the Top Brands?
Portability: A compact and lightweight design is a hallmark of leading wind-up battery chargers, making them easy to carry in backpacks or emergency kits. This portability means users can have access to power wherever they go, especially in remote or off-grid locations.
Versatility: The best wind-up battery chargers are designed to accommodate various battery types and voltages, increasing their utility across different devices. This versatility makes them suitable for everything from small gadgets to larger equipment, appealing to a broader range of users.
User-Friendly Design: Intuitive interfaces and clear instructions are essential features that enhance the user experience. A well-designed charger ensures that even those unfamiliar with technology can operate it without confusion, increasing its accessibility and effectiveness.
Are There Any User Reviews or Testimonials for Popular Models?
User reviews and testimonials can provide valuable insights into the effectiveness and reliability of the best wind-up battery chargers.
- Model A: This charger has garnered positive reviews for its compact size and ease of use. Users appreciate the quick charge time and the ability to generate power without relying on traditional electricity sources, making it great for camping and emergency situations.
- Model B: Many customers highlight the durability and robust design of this model. Testimonials often mention its reliable performance in various weather conditions, and users have noted that it can charge multiple devices efficiently, which is ideal for outdoor activities.
- Model C: Reviews for this model frequently emphasize its innovative features, such as built-in LED indicators that show charging status. Users have reported satisfaction with its lightweight design, making it easy to carry on hikes or road trips.
- Model D: This charger receives high marks for its versatility, as it can charge not only batteries but also small electronics like smartphones and tablets. Customers commend its user-friendly mechanism, allowing even those unfamiliar with battery chargers to operate it with ease.
- Model E: Users have praised this model for its eco-friendly design, utilizing sustainable materials and efficient energy use. Testimonials often highlight how it provides peace of mind during power outages, ensuring that users have a reliable backup power source when needed.
How Should You Maintain a Wind Up Battery Charger for Optimal Performance?
To maintain a wind up battery charger for optimal performance, consider the following key practices:
- Regular Cleaning: Keeping the charger clean is essential to ensure proper functionality. Dust and debris can accumulate in the moving parts, which may hinder the winding mechanism and reduce efficiency.
- Check for Wear and Tear: Regularly inspect the charger for any signs of wear, such as frayed wires or damaged components. Addressing these issues promptly can prevent further damage and maintain the charger’s reliability.
- Proper Storage: Store the charger in a dry and cool environment to prevent moisture damage and corrosion. Avoid exposing it to extreme temperatures, which can degrade the battery and internal components.
- Follow Usage Guidelines: Adhere to the manufacturer’s instructions regarding the duration and frequency of winding. Over-winding or using it beyond specified limits can lead to mechanical failures.
- Periodic Testing: Regularly test the charger’s output to ensure it is functioning correctly. This can help you identify any performance issues early on, allowing for timely repairs or replacements.
What Common Issues Should You Be Aware Of?
When considering the best wind up battery charger, there are several common issues to be aware of:
- Charging Efficiency: The efficiency of a wind up battery charger can vary significantly between models, affecting how quickly and effectively it can recharge batteries.
- Durability and Build Quality: The materials and construction of the charger influence its longevity and ability to withstand wear and tear during use.
- Compatibility: Not all wind up battery chargers are designed to work with every type of battery, so it’s essential to check compatibility with your devices.
- Storage and Portability: Some chargers may be bulkier or heavier than others, impacting their ease of transport and storage when not in use.
- User Instructions: Clear and concise instructions are crucial for effectively using the charger, as complex setups can lead to user frustration and potential damage.
Charging efficiency is critical because it determines how quickly the charger can replenish battery power. Models that can convert mechanical energy into electrical energy with minimal loss are preferable, ensuring that users can make the most out of their winding efforts.
Durability and build quality play a significant role in the long-term performance of a wind up battery charger. A well-constructed unit can withstand frequent use and the rigors of outdoor environments, making it a reliable choice for those who need a charger for adventure or emergency situations.
Compatibility is another essential factor to consider, as not every wind up battery charger is equipped to handle various battery types, such as NiMH, Li-ion, or lead-acid. Ensuring that the charger matches the specifications of your batteries will prevent damage and provide optimal charging performance.
Storage and portability are also important aspects, especially for users who need to carry their charger on the go. Lightweight and compact designs are ideal for travel, while larger units may offer additional features but at the cost of convenience.
Lastly, user instructions can greatly influence the effectiveness of the charger. A model with straightforward, easy-to-follow guidelines will help users understand how to operate their charger efficiently, while complex instructions may lead to mistakes or improper usage, ultimately diminishing the charger’s effectiveness.
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