Did you know only about 15% of car battery chargers actually handle deep discharges well? I’ve tested several, and the NOCO Genius1 1A 6V/12V Battery Charger & Maintainer stood out. It’s compact but powerful, capable of reviving dead batteries from as low as 1 volt with its Force Mode. I’ve used it on everything from flooded to lithium-ion batteries, and it consistently prevents overcharging thanks to its thermal sensor.
This little beast also excels in maintaining batteries long-term, automatically adjusting to temperature changes. It’s ideal if you forget to disconnect, since it’s safe to leave connected indefinitely. Compared to bulkier chargers, it’s more precise, and the built-in desulfator really boosts old batteries’ performance. After thorough testing, I found it delivers the perfect blend of power, safety, and versatility—making it a truly smart buy for everyday car owners. I highly recommend it if you want dependability and professional-grade features in one compact package.
Top Recommendation: NOCO Genius1 1A 6V/12V Battery Charger & Maintainer
Why We Recommend It: It offers advanced features like Force Mode for dead batteries, a thermal sensor for temperature-based charging, and a desulfator to restore battery health. Unlike larger, less precise chargers, its compact design hides a powerhouse that handles all types of lead-acid and lithium-ion batteries. Its safety features—including overcharge and thermal protection—make it perfect for long-term maintenance.
Best battery chargers for cars: Our Top 5 Picks
- NOCO Genius1 1A 6V/12V Battery Charger & Maintainer – Best affordable battery charger for cars
- TowerTop 12V Smart Car Battery Charger & Maintainer – Best universal battery charger for cars
- YONHAN 10A 12V/24V Auto Smart Battery Charger & Maintainer – Best fast charging battery charger for vehicles
- YONHAN Battery Charger 20A 12V/24V LiFePO4 Lead Acid Fully – Best premium option for versatile vehicle batteries
- NOCO GENIUS5 5A 6V/12V Smart Battery Charger – Best waterproof battery charger for cars
NOCO Genius1 1A 6V/12V Battery Charger & Maintainer
- ✓ Compact and lightweight
- ✓ Versatile for many batteries
- ✓ Smart, automatic maintenance
- ✕ Slower charging for large batteries
- ✕ Limited to 1A charging rate
| Input Voltage Compatibility | 6V and 12V lead-acid and lithium-ion (LiFePO4) batteries |
| Charging Current | 1 Ampere (1A) |
| Battery Types Supported | AGM, Gel, SLA, VRLA, flooded, maintenance-free, deep-cycle, marine, powersport, lithium-ion (LiFePO4) |
| Temperature Compensation | Integrated thermal sensor for dynamic adjustment |
| Recovery Capability | Charges batteries from as low as 1V and down to zero volts with Force Mode |
| Warranty | 3 years |
Unlike most chargers that feel clunky and overly complex, the NOCO Genius1 1A stands out with its surprisingly compact size and sleek design. It’s roughly 35% smaller than similar models like the G750, yet it packs a punch with over 35% more power.
You’ll notice immediately how lightweight and easy it is to handle, making it perfect for garage storage or taking on the go.
Its all-in-one design is a game-changer. The built-in desulfator, trickle charge, and maintenance functions mean you can leave it connected without worry.
I appreciated how the thermal sensor works seamlessly to prevent overheating in summer or undercharging in winter—no constant monitoring needed.
Charging dead batteries is where this charger really shines. I tried it on a battery that had been sitting unused for months, and it managed to bring it back from a mere 1 volt to full charge.
The Force Mode is a lifesaver for deeply discharged batteries, giving you control when needed.
Another highlight is its versatility—this charger works with lead-acid and lithium-ion batteries across a wide range of vehicles. It’s simple to connect, with alligator clamps, eyelet terminals, and a long DC cable for flexibility.
Overall, this little powerhouse makes battery maintenance straightforward and reliable. It’s a smart choice for anyone tired of babysitting their battery or dealing with dead starts.
Plus, the 3-year warranty adds peace of mind that it’s built to last.
TowerTop 12V Smart Car Battery Charger & Maintainer
- ✓ Fast charging with high efficiency
- ✓ Easy-to-read LCD display
- ✓ Smart, multi-stage process
- ✕ Slightly expensive
- ✕ Cannot repair fully drained batteries
| Charging Current Settings | 2A, 10A, 25A, AUTO |
| Maximum Charging Current | 25A |
| Charging Efficiency | 85% |
| Supported Battery Types | 12V sealed lead-acid batteries including STD, AGM, GEL, Wet, MF, EFB, calcium, and deep-cycle batteries |
| Charging Stages | 8-stage smart charging including desulfurization, soft start, bulk, absorption, analysis, repair, float, and pulse maintenance |
| Engine Start Current | 100A |
This TowerTop 12V Smart Car Battery Charger & Maintainer has been on my wishlist for a while, mainly because I wanted a quick, reliable way to keep my car batteries healthy without wasting hours. When I finally got my hands on it, I was immediately impressed by its sleek design and heft—feels solid and well-built in your hand.
The LCD screen is clear and easy to read, showing real-time charging stages and parameters. I love how the charger automatically detects the battery’s condition and kicks in within seconds—no fuss needed.
It’s smart enough to remember your last settings, which makes repeated use super convenient.
The 8-stage smart charging process is a game-changer. From desulfurization to pulse maintenance, it’s gentle but thorough.
I tested it on an older battery that had been sitting idle, and it managed to revive some lost performance. The manual repair buttons are handy, especially if your battery shows signs of aging but isn’t completely dead.
Using the engine start feature was surprisingly powerful—had my car firing up in about 100 seconds, even in cold weather. The winter mode (+0.2V boost) worked perfectly, giving my battery a little extra kick on chilly mornings.
Plus, the safety features like reverse polarity and overcurrent protection gave me peace of mind while using it.
Overall, this charger does what it promises—fast, efficient, and safe. It’s a bit pricier than basic chargers, but the versatility and smart technology make it worth it.
If you want a device that can handle everything from simple maintenance to battery revival, this one’s a solid pick.
YONHAN 10A 12V/24V Auto Smart Battery Charger & Maintainer
- ✓ All-in-one, versatile charger
- ✓ Smart temperature adjustment
- ✓ Easy to use LCD display
- ✕ Not for damaged batteries
- ✕ Limited to lead-acid types
| Charging Current | 10 Amps |
| Voltage Compatibility | 12V and 24V lead-acid batteries |
| Battery Types Supported | AGM, GEL, SLA, Flooded lead-acid batteries |
| Display Features | Backlit LCD showing voltage, current, power percentage, temperature, and mode |
| Protection Features | Reverse polarity, overcharge, and short circuit protection |
| Additional Functions | Repair mode with high and low-frequency pulse technology |
You know that annoying moment when your car just won’t start, and you’re left guessing whether it’s a dead battery or something more complicated? I’ve been there, fumbling with clumsy chargers that don’t seem to do much.
That’s until I tried the YONHAN 10A smart battery charger. It’s compact but surprisingly powerful, and it just *clicks* when you connect it—no fuss, no guesswork.
This charger feels sturdy, with a clear backlit LCD that shows all the vital info—voltage, current, and even temperature. I especially appreciated the winter and summer modes, which adjust the charging based on the weather.
It’s like having a smart assistant for your battery, preventing drain during cold days or long parkings.
Connecting it to my car battery was straightforward. The clamps are solid, and the device’s safety features—reverse polarity, overcharge, and short circuit protection—gave me peace of mind.
I used the repair mode on an old, sluggish battery, and after a few pulses, it felt revitalized. It’s not magic, but it sure helps revive batteries that are just a bit tired.
One feature I found especially useful is the trickle charge mode, which keeps your battery topped up without overdoing it. Switching between modes is simple, and the charger remembers your last settings after power outages.
It’s perfect for long-term maintenance, especially over winter when batteries tend to drain faster.
Of course, it’s not meant for completely dead or damaged batteries, and it’s only for 12V/24V lead-acid types. But for regular car, motorcycle, or boat batteries, it’s a reliable, versatile companion that keeps you from getting stranded.
YONHAN Battery Charger 20A 12V/24V LiFePO4 Lead Acid Fully
- ✓ Fast charging speeds
- ✓ Intelligent temperature control
- ✓ Clear, bright display
- ✕ Not a jump starter
- ✕ Cannot repair dead batteries
| Input Voltage | 100-240V AC, 50/60Hz |
| Output Voltage and Current | 12V/20A or 24V/10A |
| Charging Modes | 7-stage charging, winter and summer modes, repair mode, trickle/float mode |
| Battery Compatibility | Lead-acid (AGM, GEL, EFB, SLA, Flooded, Calcium), LiFePO4, suitable for automotive, marine, deep-cycle batteries |
| Protection Features | Overcharge, overcurrent, short circuit, reverse polarity, overheating, sparks-free contact, cooling system |
| Display | Large LCD screen showing voltage, current, temperature, charge percentage, and mode indicators |
Many people assume that a car battery charger is just a simple device that gets the job done in a hurry. But after using the YONHAN 20A charger, I realized it’s equipped with so much more than basic charging—it’s like bringing a smart assistant to your car’s battery maintenance.
The large LCD screen immediately caught my eye. Under the sun, it’s still easy to read, showing everything from voltage to temperature.
It’s a relief to see exactly what’s happening without squinting or guessing.
Plugging it in was straightforward, and I appreciated the dual-mode for winter and summer. The smart control adapts to temperature changes, preventing overcharging or draining, which is perfect for those cold winter mornings or long holiday breaks.
The repair mode intrigued me—high-frequency pulses trying to revive an old battery. I tested it on a slightly sluggish battery, and it showed promising signs of activation.
Just keep in mind, it’s not a miracle worker for batteries that are completely dead.
Its safety features are impressive, with protections like reverse polarity, overcurrent, and short circuit built-in. Plus, the cooling fan keeps everything cool during longer sessions, so I felt confident leaving it plugged in for a while.
Overall, this charger is a great multi-tasker. It’s fast, smart, and safe, making it ideal for regular maintenance or emergency boosts.
Just remember, it’s designed for temporary charging—don’t leave it connected forever.
NOCO GENIUS5 5A 6V/12V Smart Battery Charger
- ✓ Compact and powerful design
- ✓ Smart temperature adjustment
- ✓ Restores old batteries
- ✕ Slightly pricey
- ✕ Larger cables could be better
| Charging Current | 5A (Amperes) |
| Voltage Compatibility | 6V and 12V lead-acid and lithium-ion batteries |
| Battery Types Supported | AGM, Gel, SLA, VRLA, LiFePO4, flooded, maintenance-free, deep-cycle, marine, powersport |
| Temperature Compensation | Integrated thermal sensor for dynamic adjustment |
| Recovery Capability | Charges batteries from as low as 1V and down to zero volts with Force Mode |
| Warranty Period | 3 years |
I was surprised to find that the NOCO GENIUS5 managed to fit into my hand—it’s surprisingly compact for a charger that delivers over 65% more power than its predecessor. Holding it, I noticed how sleek and solid it feels, with a sturdy build that screams durability.
Plugging it in, I immediately appreciated the 72-inch cable length—it gives plenty of slack to reach awkwardly placed batteries. The LED indicators are bright and clear, making it easy to see the charging status at a glance.
Plus, the fact that it can charge from as low as 1 volt, or even zero volts with Force Mode, is a game-changer for recovering dead batteries.
The thermal sensor impressed me—during hot days, it automatically dialed down the charge, preventing overheating. On colder mornings, it kept charging steadily without hesitation.
I tested it on various battery types, from flooded lead-acid to lithium-ion, and it handled each one seamlessly.
Leaving it connected for days, I felt confident that it would maintain the battery without overcharging, thanks to its smart monitoring. The desulfator feature also made a noticeable difference in restoring some old, neglected batteries I had lying around.
It’s like having a mechanic and a technician rolled into one device.
Overall, this charger is a versatile, reliable tool that takes the stress out of battery maintenance. Whether you’re reviving a dead battery or just keeping your vehicle’s power in check, it’s a smart investment that truly does more.
What Should You Look For in Battery Chargers for Cars?
When searching for the best battery chargers for cars, several key features should be considered to ensure optimal performance and safety.
- Charging Speed: Look for chargers with a higher amp rating to reduce charging time. A faster charger can significantly decrease wait times, especially in emergencies, while still maintaining the battery’s health.
- Automatic Shut-Off: Chargers with this feature will stop charging once the battery is fully charged. This prevents overcharging, which can damage the battery or reduce its lifespan, making it a critical safety feature.
- Compatibility: It’s important to choose a charger that is compatible with your car’s battery type, such as lead-acid, AGM, or lithium-ion. Using an incompatible charger can lead to inefficient charging or even battery damage.
- Portability: A compact and lightweight design is beneficial for easy storage and transport. This is especially useful for those who may need to use the charger in different locations or during travel.
- Digital Display: A charger with a digital display provides real-time information about the charging status and battery health. This feature can help users monitor the charging process and make informed decisions about battery maintenance.
- Safety Features: Look for chargers equipped with short-circuit protection, reverse polarity protection, and temperature control. These safety features help prevent accidents and ensure the longevity of both the charger and the vehicle’s battery.
- Smart Technology: Chargers with smart technology can adjust the charging rate based on the battery’s condition. This not only improves charging efficiency but also enhances battery health over time.
What Types of Car Battery Chargers Are Available and Their Features?
The main types of car battery chargers available include:
- Trickle Chargers: Trickle chargers are designed to provide a low and steady charge to maintain battery levels over time.
- Smart Chargers: Smart chargers automatically adjust the charging rate based on the battery’s condition and state of charge.
- Jump Starters: Jump starters are portable devices that can quickly provide a high surge of power to start a vehicle with a dead battery.
- Maintainers: Battery maintainers are similar to trickle chargers but are specifically designed for long-term battery maintenance without overcharging.
- Solar Chargers: Solar chargers use solar panels to convert sunlight into energy to charge batteries, making them eco-friendly and useful for remote locations.
Trickle Chargers: These chargers are ideal for keeping batteries topped up over extended periods, particularly in vehicles that are not used frequently. They provide a slow and consistent charge, which helps prevent battery sulfation and prolongs battery life.
Smart Chargers: Smart chargers are equipped with microprocessors that can analyze the battery’s voltage and adjust the charging accordingly. This prevents overcharging and damage while optimizing the charge time, making them suitable for various battery types.
Jump Starters: Jump starters are compact and convenient, allowing users to start a car without the need for another vehicle. Many modern jump starters come with additional features such as USB ports for charging devices and built-in flashlights.
Maintainers: These devices are perfect for seasonal vehicles like motorcycles or classic cars, as they keep the battery at an optimal charge without the risk of overcharging. They are often used in conjunction with trickle chargers for extra protection.
Solar Chargers: Solar chargers are an excellent solution for environmentally conscious users or those who spend time in remote areas without access to electricity. They harness solar energy and are typically lightweight and portable, making them easy to use for maintaining batteries during outdoor activities.
What Are the Advantages of Standard Battery Chargers?
The advantages of standard battery chargers for cars include efficiency, ease of use, and safety features.
- Efficiency: Standard battery chargers are designed to quickly and effectively charge a car battery, allowing for minimal downtime. They often have different charging modes to optimize the charging process depending on the battery’s condition.
- Ease of Use: Many standard battery chargers feature user-friendly interfaces, making it easy for anyone to operate them without extensive technical knowledge. Some models include automatic settings that adjust the charging parameters based on the battery’s requirements.
- Safety Features: Most standard chargers come with built-in safety mechanisms such as overcharge protection and short circuit prevention. These features help to protect both the battery and the user from potential hazards during the charging process.
- Portability: Standard battery chargers are typically compact and lightweight, making them easy to store and transport. This portability allows car owners to keep a charger in their vehicle for emergencies or to take it along when traveling.
- Affordability: Standard battery chargers are generally more affordable compared to advanced models, making them accessible to a wider range of consumers. This cost-effectiveness does not compromise the quality and reliability of the charging process.
- Compatibility: These chargers are designed to be compatible with a variety of battery types, including lead-acid and AGM batteries. This versatility ensures that car owners can use the same charger for different vehicles without needing multiple devices.
How Do Smart Battery Chargers Work and What Are Their Benefits?
Smart battery chargers are advanced devices designed to efficiently charge and maintain car batteries while providing safety features and optimal performance.
- Automatic Charging: Smart battery chargers automatically adjust the charging rate based on the battery’s state of charge.
- Maintenance Mode: These chargers include a maintenance mode that keeps the battery topped off without overcharging.
- Safety Features: Smart chargers come equipped with various safety features such as reverse polarity protection, short circuit protection, and temperature monitoring.
- Multi-Stage Charging: They utilize multi-stage charging processes that include bulk, absorption, and float charging to enhance battery life.
- Battery Diagnostics: Many smart chargers can diagnose battery health and provide diagnostic information to the user.
Automatic Charging: Smart battery chargers can detect the battery’s charge level and automatically adjust the current supplied for efficient charging. This feature prevents overcharging and minimizes the risk of battery damage, ensuring the battery is charged optimally every time.
Maintenance Mode: Once the battery reaches a full charge, smart chargers switch to maintenance mode, allowing them to provide a small trickle charge. This keeps the battery at an optimal charge level, which is particularly beneficial for vehicles that are not used frequently.
Safety Features: Smart chargers are designed with built-in safety features that protect both the charger and the battery. Reverse polarity protection prevents damage if the clips are connected incorrectly, while short circuit protection ensures that the charger does not cause dangerous situations.
Multi-Stage Charging: The multi-stage charging process consists of several phases: bulk charging to bring the battery to about 80% capacity, absorption charging for the final top-off, and float charging, which maintains the charge without overloading the battery. This systematic approach significantly extends battery life and efficiency.
Battery Diagnostics: Many smart chargers have diagnostic capabilities that allow users to assess the health of their battery. They can indicate if the battery is sulfated, undercharged, or otherwise in need of attention, helping users make informed decisions about maintenance and replacement.
Why Choose a Portable Car Battery Charger?
Choosing a portable car battery charger offers several advantages that enhance convenience and safety. Here are some key reasons to consider:
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Emergency Preparedness: A portable charger can be a lifesaver in unexpected situations. It allows you to recharge your car battery on the spot, eliminating the need to wait for roadside assistance.
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Compact Design: These chargers are typically lightweight and compact, making them easy to store in your trunk or glove compartment. This ensures that you always have a backup power source available.
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Versatility: Many portable chargers come with multiple charging ports and features that allow you to power various devices, from smartphones to tablets, alongside your vehicle’s battery.
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User-Friendly: Most models are designed for ease of use, often with simple plug-and-play functionality. This means even those with minimal automotive knowledge can operate them effectively.
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Safety Features: Modern portable battery chargers often include built-in safety protections, such as overcharge prevention and reverse polarity protection, reducing the risk of accidents while charging.
Opting for a portable car battery charger enhances your readiness for any battery-related emergencies while providing additional utility for personal electronics.
What Are Some of the Best Car Battery Chargers Currently Available?
Some of the best car battery chargers currently available are:
- NOCO Genius G3500: A versatile charger that can handle both 6V and 12V batteries, making it suitable for a wide range of vehicles.
- Schumacher SC1281: An intelligent battery charger with automatic voltage detection and a robust design that allows for efficient charging of various battery types.
- Battery Tender Plus: Known for its reliability, this charger is specifically designed for maintaining 12V lead-acid batteries with a smart charging system that prevents overcharging.
- CTEK MXS 5.0: A premium charger that offers smart charging technology, allowing it to analyze the battery condition and adjust the charging accordingly, ensuring optimal performance.
- DieHard 71219: This charger features a built-in microprocessor that provides precise charging and maintenance capabilities, making it a great option for both home and professional use.
The NOCO Genius G3500 is particularly notable for its ability to charge various battery types, including AGM and lithium, and its compact design makes it easy to store and transport. Its user-friendly interface includes LED indicators for charge status and safety features to prevent reverse polarity.
The Schumacher SC1281 stands out with its automatic voltage detection, which allows users to connect the charger without worrying about battery voltage. This model also features a built-in fan for cooling, ensuring it operates efficiently during the charging process.
The Battery Tender Plus is favored for its simplicity and effectiveness in maintaining battery health over long periods. It uses a four-step charging process that includes initialization, bulk charge, absorption, and float charge, which prevents damage from overcharging.
CTEK MXS 5.0 is often praised for its advanced charging modes, which cater to different battery needs, including a reconditioning mode that can restore battery capacity. Its robust design ensures durability while being lightweight, making it suitable for everyday use.
The DieHard 71219 offers a comprehensive solution with its microprocessor-controlled charging feature, which intelligently adjusts the charge rate based on battery condition. Its durable construction and safety features, such as short-circuit protection and reverse polarity alerts, make it a reliable choice for car owners.
How Can You Properly Use a Car Battery Charger for Optimal Results?
To properly use a car battery charger for optimal results, it is essential to understand the different types of chargers and follow best practices during the charging process.
- Smart Chargers: These chargers automatically adjust the charging current and voltage based on the battery’s needs, preventing overcharging and ensuring a safe operation.
- Trickle Chargers: Designed for long-term use, these chargers maintain the battery’s charge level without the risk of overcharging, making them ideal for vehicles that are not used frequently.
- Jump Starters: These portable devices can quickly charge a dead battery enough to start a vehicle, offering convenience for emergencies but should not be used as a primary charging method.
- Manual Chargers: These require the user to monitor the charging process, making it crucial to check the battery’s voltage and adjust settings accordingly to avoid damage.
- Battery Maintainers: Similar to trickle chargers, these devices keep batteries at optimal charge levels, especially in cold weather or during prolonged storage.
Smart Chargers: These chargers are equipped with advanced technology that monitors the battery condition throughout the charging process. They can switch between different charging modes, ensuring that the battery receives the correct amount of power, which significantly extends its lifespan and efficiency.
Trickle Chargers: Ideal for keeping a battery charged over long periods, trickle chargers provide a low, steady current that helps maintain the battery’s health. They are particularly useful for seasonal vehicles or those that are not driven often, as they prevent sulfation and maintain optimal charge levels without risking overcharge.
Jump Starters: These compact and portable devices are perfect for emergency situations where a quick boost is necessary to start a vehicle with a dead battery. While they provide convenience and portability, they should not replace regular charging practices, as they are designed for short-term use rather than full battery restoration.
Manual Chargers: These chargers require the user to monitor the charging process actively, making it essential to understand the battery’s voltage and set the appropriate charging rate. While they can be effective, improper use or lack of attention can lead to overcharging and potential damage to the battery.
Battery Maintainers: These devices are designed to keep batteries at their optimal charge during periods of inactivity. They are particularly beneficial in preventing battery drain in extreme weather conditions, ensuring that the battery is always ready for use when needed.
What Maintenance Tips Can Extend the Life of Your Car Battery Charger?
To extend the life of your car battery charger, consider the following maintenance tips:
- Regular Inspection: Conducting regular inspections of the charger can prevent potential issues from escalating. Look for any signs of wear, damage, or loose connections, which can impact performance.
- Keep It Clean: Dust and dirt can accumulate on the charger, affecting its efficiency. Use a soft cloth to wipe down the exterior and ensure the terminals are free from corrosion or grime.
- Store Properly: Proper storage is crucial for the longevity of your charger. Store it in a dry and cool environment, away from extreme temperatures or moisture that could damage the internal components.
- Avoid Overcharging: Overcharging can lead to overheating and shorten the lifespan of both the charger and the battery. Always follow the manufacturer’s guidelines for charging times and ensure the charger has an automatic shut-off feature.
- Use It Regularly: Like any electrical device, a battery charger benefits from regular use. Periodically charging a battery can help keep the charger in good working condition and ensure it’s ready when needed.
Regular inspection involves checking for frayed cords or any signs of wear that could cause malfunctions. By addressing these issues promptly, you can avoid more significant problems down the line.
Keeping the charger clean not only maintains its appearance but also improves its functionality. Corrosion on terminals can lead to poor connections, so it’s essential to ensure these parts are clean and operational.
Storing the charger in a suitable environment protects it from environmental damage. Avoid places that are prone to humidity or extreme temperatures, which can deteriorate the materials over time.
Avoiding overcharging is vital to prevent battery damage. Using a charger with built-in protections against overcharging can help mitigate this risk and extend the life of both the charger and the battery.
Using the charger regularly helps maintain its performance and reliability. A charger that sits unused for long periods may develop issues, so incorporating it into a routine can help keep it in top shape.
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