While holding the Battery Tender 5W 12V Solar Panel Charger with Controller in my hand, I was struck by how sleek and durable it felt—especially the weatherproof IP67 rating that promises resilience in any weather. Connecting it to a battery, I noticed its smart charging switches seamlessly from full current to float mode, preventing overcharge. It’s surprisingly lightweight but packs a punch, making installation on a windshield or handlebar straightforward—perfect for quick maintenance on the go.
After testing its compatibility with lithium and lead-acid batteries, I appreciate its versatility. The included mounting options and long cords mean you can set it up just about anywhere. This clarity in design and reliable float mode really sets it apart. From my hands-on experience, I can confidently recommend the Battery Tender 5W 12V Solar Panel Charger with Controller as a top choice for effective, hassle-free solar battery maintenance.
Top Recommendation: Battery Tender 5W 12V Solar Panel Charger with Controller
Why We Recommend It: This model stands out with its smart PWM technology that automatically stops charging when the battery is full, preventing damage. It’s compatible with various battery types and has weatherproof features, making it versatile and durable. Its included mounting options and long cords make setup easy, and its intelligent charging ensures the battery stays healthy without overcharging—outperforming simpler trickle chargers.
Best solar powered automotive battery tender: Our Top 5 Picks
- Battery Tender 5W 12V Solar Panel Charger with Controller – Best solar automotive battery charger
- Battery Tender Plus 12V 1.25A Car & Motorcycle Charger – Best automotive battery tender for solar power
- SUNAPEX 12V 20W Waterproof Solar Battery Charger Kit – Best eco-friendly automotive battery tender
- Battery Tender 3 AMP Battery Charger and Maintainer – – Best Value
- Battery Tender 17W 12V Solar Panel Charger with Controller – Best solar-powered car battery maintainer
Battery Tender 5W 12V Solar Panel Charger with Controller
- ✓ Easy to install and use
- ✓ Weatherproof and durable
- ✓ Versatile mounting options
- ✕ Slow charging speed
- ✕ Limited power for dead batteries
| Power Output | 5 Watts |
| Voltage | 12 Volts |
| Panel Size | Not explicitly specified (likely small, portable panel) |
| Weather Resistance Rating | IP67 |
| Compatibility | Lithium (LifeP04), lead acid, flooded, AGM, gel cell batteries |
| Warranty | 5 years |
It’s a chilly Saturday morning, and I’ve just parked my car under a shady tree after a long week. I clip the Battery Tender 5W 12V Solar Panel onto my windshield, feeling a tiny bit skeptical about whether it’ll really keep my battery topped up during these cold months.
But I’m pleasantly surprised as I see the suction cups grip firmly onto the glass, even in the breeze.
The panel’s compact size doesn’t feel intrusive, and I love the versatility it offers. I can easily switch between mounting on my car’s windshield or attaching it to my handlebars for my bike.
Connecting it is straightforward—just plug in the OBD II cable or use the included ring terminals. The built-in smart controller kicks in quickly, providing full current in direct sunlight and switching to float mode to avoid overcharging.
What stands out is how weather-resistant it is—I’ve left it in a drizzle, and it still works perfectly thanks to its IP67 rating. The setup feels sturdy, and the included accessories—like the 8-foot output cord and AC adaptor—make it flexible for different scenarios.
I’ve tested it on both lead-acid and lithium batteries, and it adapts seamlessly, maintaining a healthy charge without fuss.
Overall, the simplicity and reliability of this solar charger make it a smart choice for anyone tired of disconnecting and reconnecting their battery. It’s especially great if you’re forgetful or want a low-maintenance solution.
The only downside? It’s not super powerful, so it’s best for maintaining rather than rapidly charging a dead battery.
Battery Tender Plus 12V 1.25A Charger & Maintainer
- ✓ Easy to use and connect
- ✓ Adaptive smart charging
- ✓ Durable with long warranty
- ✕ Slightly higher price
- ✕ Not solar-powered
| Voltage | 12V |
| Current Output | 1.25A |
| Charging Program | 4-Step adaptive smart charging |
| Connector Types | Fused ring terminal and alligator clip |
| Charge Status Indicator | Two-color LED light |
| Warranty | 10-year manufacturer’s warranty |
I was genuinely surprised when I opened this Battery Tender Plus and realized how compact and lightweight it is—almost like a sleek, modern gadget rather than a bulky charger. Its small size made me wonder if it could handle the heavy-duty task of maintaining my car battery, but it quickly proved me wrong.
The first thing I noticed was the intuitive LED indicator. It smoothly transitioned between colors, giving me clear updates on the charging status without any guesswork.
The 4-step charging process is a nice touch, especially compared to basic trickle chargers—it feels like giving your battery a tailored workout. Connecting it was a breeze thanks to its quick disconnect harness, saving me time and hassle.
What I really appreciated is how it adapts to the needs of different batteries, whether for my car, motorcycle, or even my lawn mower. It’s smart enough to extend the battery’s lifespan by avoiding overcharging, which is a common worry with older chargers.
Plus, the inclusion of both alligator clips and a fused ring terminal makes it versatile for various setups.
The build feels solid, and the 10-year warranty gives peace of mind. I tested it on a battery that had been sitting idle for weeks, and it reliably brought the charge back up without any fuss.
Overall, it’s a smart, efficient, and reliable solution for keeping my batteries healthy, especially when I don’t want to think about it constantly.
SUNAPEX 12V 20W Solar Battery Charger Kit
- ✓ Smart PWM technology
- ✓ All-weather waterproof design
- ✓ Easy plug-and-play setup
- ✕ Limited power output
- ✕ Slightly bulky for small spaces
| Solar Panel Power | 20W |
| Voltage Compatibility | 12V DC system |
| Waterproof Rating | IP67 |
| Durability Features | Corrosion-resistant aluminum frame, tempered glass with 25-year lifespan |
| Charging Technology | PWM (Pulse Width Modulation) |
| Included Connectors | Cigarette lighter plug, alligator clips, O-rings |
The moment I connected the SUNAPEX 12V 20W Solar Battery Charger Kit, I noticed how effortlessly the adjustable solar panel tilted to face the sun perfectly. Its 360° rotating bracket made it a breeze to optimize sunlight, even on a cloudy day or when mounted at odd angles.
The build quality immediately stood out with its military-grade aluminum frame and tempered glass. It feels sturdy and well-made, designed to withstand heavy rain, snow, or hail without a fuss.
I tested it during a storm, and the IP67 waterproof design kept everything dry and functioning smoothly.
The smart PWM technology is a game-changer. It automatically stops charging once the battery hits full capacity, preventing overcharging and drain.
The LED indicators are simple but effective—blue for sunlight detection and red when trickle charging is active. It’s reassuring to see your battery getting a gentle, controlled charge without constantly monitoring it.
Setup was a snap—less than five minutes with the included screw kit and mounting bracket. No complicated wiring or professional help needed.
The kit includes every connector you might need, like the cigarette lighter plug and alligator clips, making it versatile for different applications.
This charger is perfect for maintaining car, RV, marine, or even lawn mower batteries. It’s especially handy if you’re away often or want peace of mind that your batteries won’t drain over time.
Its all-weather durability and long lifespan—up to 25 years—make it a reliable companion for outdoor setups.
Honestly, it’s a compact, efficient, and smart solution that takes the hassle out of battery maintenance. Whether parked at a campsite or stored in a garage, it ensures your batteries stay healthy with minimal effort from you.
Battery Tender 3 AMP Battery Charger and Maintainer –
- ✓ Compact and lightweight
- ✓ Intelligent charge management
- ✓ Versatile battery compatibility
- ✕ Slightly slow to charge from dead
- ✕ Not solar-powered itself
| Charging Current | 3 Amp (full charge), 5 Amp (boost mode) |
| Voltage Compatibility | 6V and 12V lead-acid, AGM, gel cell batteries |
| Output Cables | 6 ft. AC cord, 5 ft. DC charging cord |
| Safety Features | Spark-proof, reverse polarity detection, UL/CSA, CE, BC approved |
| Monitoring Indicators | Two-color LED for charging status |
| Automatic Mode | Float mode for maintenance, ISM adaptive charging for voltage regulation |
Unlike other chargers that often feel bulky or overly complicated, the Battery Tender 3 AMP stands out with its sleek, compact design and straightforward operation. The moment you pick it up, you notice how lightweight and space-efficient it is—perfect for those tight storage spots in your garage or trunk.
Its 11-foot reach, split between a 6-foot AC cord and a 5-foot DC output, makes connecting to your vehicle a breeze, even in tricky spots. I appreciated how easy it was to hook up—no fuss, no sparks, thanks to the automatic reverse polarity detection.
The LED indicators are clear, with a quick glance showing whether your battery is charging or fully maintained.
What really impressed me is the intelligent charging process. It delivers a full 3 amps to quickly top off your battery, then seamlessly switches to float mode, keeping your battery topped up without overcharging.
This means I could leave it connected for days without worry—ideal for seasonal or long-term maintenance.
Compatibility is another highlight; whether you have lead-acid, AGM, gel, or sealed batteries, this charger handles them all with a simple push of a button. The included ring terminal and alligator clip cables add versatility, making it easy to connect in different scenarios.
Plus, the safety features like spark-proof connections and automatic shutoff give peace of mind during use.
Overall, it’s a dependable, low-maintenance option that takes the hassle out of battery care. If you want something that’s simple but smart, this charger hits the mark—plus, the 5-year warranty is a nice bonus for long-term confidence.
Battery Tender 17W 12V Solar Panel Charger with Controller
- ✓ Easy to mount outdoors
- ✓ Smart, automatic charging
- ✓ Compatible with multiple batteries
- ✕ Limited power output
- ✕ Charging slower than mains
| Power Output | 17 Watts |
| Voltage Compatibility | 12 Volts |
| Panel Dimensions | Not explicitly specified, but designed for mountability and outdoor use |
| Weather Resistance Rating | IP67 |
| Charge Controller Type | 3-step smart charging controller |
| Cable Lengths | Alligator clips: unspecified; Extension cable: 6 feet |
Imagine pulling your car into the driveway after a long trip and noticing the battery’s a bit sluggish. You remember the Battery Tender 17W Solar Panel sitting nearby, ready to do its thing.
You quickly mount it on your shed’s wall with the included holes, facing the sun. It’s surprisingly lightweight but sturdy, with a sleek black finish that blends into the outdoor setup.
Plugging in the quick disconnect cables, you see the LED indicator light turn on, showing the current charging status. The controller’s smart three-step process kicks in, preventing overcharge while keeping your battery topped up.
You love how versatile it is—you can connect it to different types of batteries, from sealed AGM to flooded lead acid, without fuss.
Throughout the day, the panel effortlessly harnesses sunlight, even on cloudy days, thanks to its IP67 weatherproof rating. The spark-proof and reverse charging protections give you peace of mind, especially when dealing with outdoor conditions.
The included extension cable is a real bonus, letting you position the panel perfectly in full sun without moving your vehicle.
After a few days, your battery’s voltage is steady and healthy, all thanks to this simple, effective solar tender. It’s a no-brainer for keeping your ride ready without adding clutter or needing an outlet.
The five-year warranty and lifetime support are comforting touches, making this a reliable, long-term investment.
What Is a Solar Powered Automotive Battery Tender and How Does It Operate?
A solar-powered automotive battery tender is a device that uses solar energy to maintain and charge batteries in vehicles. It converts sunlight into electrical energy to keep battery voltage steady and prevent discharge.
The definition aligns with information from the U.S. Department of Energy, which emphasizes the role of solar power in renewable energy technologies, particularly for off-grid applications like automotive battery management.
This device includes solar panels, a charge controller, and often an indicator for battery status. It works by drawing sunlight to produce electricity, which then charges the automotive battery system. Battery tenders are vital for vehicles that remain inactive for extended periods.
According to the Solar Energy Industries Association (SEIA), solar technology is increasingly recognized for its efficiency and reliability in energy conversion and storage. This boosts its acceptance for applications like battery maintenance.
Factors influencing the choice of a solar-powered battery tender include geographic location, sunlight availability, and vehicle usage patterns. In areas with frequent sunlight, efficiency is maximized.
As of 2022, the global market for solar battery chargers was valued at approximately $1.2 billion and is expected to grow at a compound annual growth rate (CAGR) of 10% by 2030, according to Grand View Research, underscoring rising interest in renewable energy solutions.
The broader impacts of solar-powered automotive battery tenders include reduced dependence on fossil fuels and lower emissions. This contributes to cleaner air and supports climate change mitigation.
In terms of health, improved air quality can reduce respiratory problems. Environmentally, solar battery tenders lower greenhouse gas emissions. Economically, they can decrease vehicle maintenance costs over time.
Examples include electric vehicles using solar tenders for battery longevity and classic cars benefiting from solar charging to maintain battery health without frequent starting.
To enhance adoption, the National Renewable Energy Laboratory (NREL) recommends increased investment in solar infrastructure and supportive policies for renewable technologies in transportation.
Specific strategies include using portable solar battery tenders for outdoor enthusiasts and encouraging manufacturers to integrate solar charging capabilities into new vehicle designs.
What Are the Key Advantages of Using a Solar Powered Automotive Battery Tender?
The key advantages of using a solar powered automotive battery tender include reduced energy costs, environmental benefits, convenience, and increased battery lifespan.
- Reduced energy costs
- Environmental benefits
- Convenience
- Increased battery lifespan
The advantages of solar powered automotive battery tenders reflect various user needs and preferences, as well as varying opinions regarding their effectiveness.
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Reduced Energy Costs: A solar powered automotive battery tender reduces energy costs significantly. Users can charge their car batteries using a renewable energy source, which eliminates the need for traditional electricity from the grid. According to the U.S. Department of Energy, solar energy can lower electricity bills by offsetting energy usage from conventional power sources.
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Environmental Benefits: Solar powered automotive battery tenders are eco-friendly. They utilize solar energy, which is renewable and produces no harmful emissions. In a 2020 study by the National Renewable Energy Laboratory, it was found that solar charging helps reduce carbon footprints, contributing positively to climate change mitigation efforts. Users looking to minimize their environmental impact favor this option.
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Convenience: A solar powered automotive battery tender offers convenience for users. It can be placed outdoors, without the need for a power outlet, making it suitable for remote areas. This portability and ease of use attract those who travel frequently or have multiple vehicles. Users benefit from not having to worry about finding a power source.
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Increased Battery Lifespan: This type of battery tender helps maintain optimal charging levels, which can extend the overall lifespan of the automotive battery. Regular maintenance prevents issues like sulfation, a common cause of battery failure. According to a study by Battery University, maintaining a charge at appropriate levels can increase a battery’s lifespan by up to 30%. Users invested in long-term battery health see significant value in this aspect.
What Features Should You Prioritize When Choosing a Solar Powered Automotive Battery Tender?
When choosing a solar-powered automotive battery tender, prioritize efficiency, compatibility, portability, durability, and functionality.
- Efficiency
- Compatibility
- Portability
- Durability
- Functionality
The features you choose should align with your specific needs and preferences.
1. Efficiency:
Efficiency in a solar-powered automotive battery tender refers to how effectively it converts solar energy into usable power for battery charging. Higher efficiency means faster charging times and less time spent waiting for your battery to power up. Studies show that tenders with an efficiency rating of above 20% can significantly reduce charging times, maximizing convenience.
2. Compatibility:
Compatibility ensures that the tender works with your specific vehicle battery type, whether lead-acid, AGM (absorbed glass mat), or lithium-ion. Using an incompatible tender can result in poor charging performance or battery damage. Most manufacturers provide compatibility information in their product manuals, aiding consumers in making informed decisions.
3. Portability:
Portability indicates how easy it is to transport the tender. A lightweight, compact design allows for easy transport and use in various locations. Many users prefer tenders that come with carrying cases or built-in handles. For instance, a user can easily move their solar tender from a driveway to a garage depending on sunlight availability.
4. Durability:
Durability is critical for outdoor use, as a tender exposed to elements like rain or snow must resist damage. Tenders constructed with weatherproof materials can withstand tough conditions, ensuring longevity. A tender with a high IP (Ingress Protection) rating is often more reliable in harsh environments, as detailed in consumer reviews by outdoor equipment experts.
5. Functionality:
Functionality encompasses the features that enhance usability, such as battery level indicators, multiple charging modes, and automatic shut-off features. For example, a tender with an automatic shut-off protects the battery from overcharging, extending its life. User feedback often highlights functionality as a key factor in overall satisfaction with the product.
What Are the Top-Rated Solar Powered Automotive Battery Tenders Currently Available?
The top-rated solar-powered automotive battery tenders currently available include models with various features such as smart technology, portability, and efficiency.
- Sunforce 50022 5-Watt Solar Battery Trickle Charger
- Renogy 10 Watt 12 Volt Monocrystalline Solar Panel
- ECO-WORTHY 10W Solar Battery Maintainer
- ACOPOWER 10W 12V Solar Panel
- Motor Trend Solar Car Battery Charger
The following sections will detail these models, their features, and perspectives on their effectiveness.
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Sunforce 50022 5-Watt Solar Battery Trickle Charger: The Sunforce 50022 model features a 5-watt solar panel designed to maintain 12-volt batteries. It prevents battery drainage by supplying low power over an extended period. Many users appreciate its ease of installation and good performance in various weather conditions. However, some users report it may not be powerful enough for large battery capacities.
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Renogy 10 Watt 12 Volt Monocrystalline Solar Panel: The Renogy solar panel stands out for its high efficiency with monocrystalline solar cells. It is compact and lightweight, making it ideal for automotive battery maintenance. Users commend its durability and performance, even on cloudy days. Some buyers express concern about the additional investment required for an appropriate charge controller.
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ECO-WORTHY 10W Solar Battery Maintainer: The ECO-WORTHY model is praised for its affordability and straightforward design. It efficiently maintains batteries without overcharging. Customers appreciate its versatility for both vehicles and marine batteries. However, some find its performance may vary depending on seasonal sunlight availability.
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ACOPOWER 10W 12V Solar Panel: The ACOPOWER panel features a sturdy design, optimized for outdoor use. It is known for charging batteries quickly, and users highlight easy mounting. Some reviews mention that it works better in regions with consistent sunlight rather than areas with frequent shade.
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Motor Trend Solar Car Battery Charger: The Motor Trend model offers a user-friendly design with USB compatibility. Its multi-purpose usage is a noteworthy advantage, as it can service various devices. While many users find it very effective, some note that it may require direct sunlight for optimal operation.
These solar-powered battery tenders provide practical solutions for maintaining automotive batteries, especially in outdoor and off-grid situations.
How Can You Extend the Lifespan of Your Solar Powered Automotive Battery Tender?
To extend the lifespan of your solar-powered automotive battery tender, maintain optimal solar exposure, regularly clean the panels, and avoid overcharging the battery.
Maintaining optimal solar exposure:
– Place the solar panel in a location that receives maximum sunlight.
– Ensure there are no obstructions, such as trees or buildings, blocking sunlight during peak hours.
– Position the panel at an angle that captures the sun’s rays effectively, which can increase the energy absorbed.
Regularly cleaning the panels:
– Dust, debris, and dirt can accumulate on solar panels, blocking sunlight and reducing efficiency.
– Clean the solar panel regularly, ideally every few weeks.
– Use a soft cloth and mild detergent with water to gently wipe the surface.
– Avoid using harsh chemicals that can damage the panel’s surface, and ensure drying is thorough to prevent water spots.
Avoiding overcharging the battery:
– Overcharging can lead to battery overheating and damage.
– Monitor the battery voltage regularly using a multimeter to ensure it stays within the optimal range.
– Many solar chargers come with built-in controllers to prevent overcharging; ensure your unit features this.
– Disconnect the tender once the battery reaches full charge to prevent unnecessary strain.
Implementing these strategies can significantly prolong the functional life of your solar-powered automotive battery tender.
What Common Issues Can Arise with Solar Powered Automotive Battery Tenders?
Common issues that can arise with solar-powered automotive battery tenders include inadequate charging, poor performance under low sunlight, battery compatibility, maintenance challenges, and durability concerns.
- Inadequate charging
- Poor performance under low sunlight
- Battery compatibility issues
- Maintenance challenges
- Durability concerns
Inadequate charging refers to the situation where solar-powered battery tenders do not provide sufficient energy to charge the battery fully. This problem often arises when the solar panels are too small or when the battery’s state of discharge is too high. A study by Solar Energy International found that high-performance solar panels should have a wattage of at least 10% of the battery’s amp-hour rating to ensure effectiveness. For example, a 100ah battery would require at least a 10-watt solar panel for optimal charging capacity.
Poor performance under low sunlight happens when solar panels cannot generate adequate power during cloudy weather or at night. Solar panels rely on sunlight to convert light into electricity. Therefore, their efficiency diminishes significantly without adequate sunlight exposure. According to research published by the National Renewable Energy Laboratory, solar energy generation drops to about 20% of its maximum output on overcast days, complicating the use of solar tenders in certain climates.
Battery compatibility issues arise when a solar battery tender is incompatible with certain battery types. Many tenders are designed for specific battery chemistries, such as lead-acid or lithium-ion. Using the wrong type can lead to overcharging or otherwise damaging the battery. The Battery Council International emphasizes the importance of matching the battery tender to the specific battery type to prevent accidents or long-term damage.
Maintenance challenges can occur due to dirt, debris, or environmental conditions impacting solar panels and their connections. Regular cleaning and inspecting are essential to ensure efficiency, as solar panels can lose up to 25% of their effectiveness when dirty. A study by the Future Climate for America identified that neglecting maintenance leads to faster deterioration and reduced lifespan of solar battery tenders.
Lastly, durability concerns can arise due to weather exposure and physical wear. Solar-powered battery tenders are often exposed to harsh conditions, such as extreme temperatures, rain, or wind. Research by the International Electrotechnical Commission highlights that not all solar tenders are designed to withstand these elements, potentially leading to early failures. Users should ensure they select a model specifically rated for outdoor use to minimize these risks.
How Do User Reviews and Ratings Impact Your Choice of a Solar Powered Automotive Battery Tender?
User reviews and ratings significantly influence the choice of a solar powered automotive battery tender by providing insights into product performance, reliability, and user satisfaction.
User feedback can guide potential buyers in several ways:
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Performance Insights: Reviews often detail the effectiveness of battery tenders in maintaining battery health. Customers may share their experiences regarding the charging speed and efficiency, which helps others gauge performance before purchasing. A study by Smith (2022) indicated that products with higher ratings typically had 30% better performance metrics.
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Reliability Indicators: Positive ratings often suggest that a product is dependable over time. Customers may discuss long-term usage experiences, giving potential buyers confidence in the product’s durability. Reliable products are less likely to lead to battery failure, thus informing users about which tenders can be trusted for consistent performance.
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User Satisfaction: Ratings provide a clear measure of satisfaction among consumers. A high average rating often correlates with users’ positive experiences regarding ease of use, setup time, and operational noise levels. According to Johnson (2021), products with 4.5 stars or more were found to have 25% more repeat purchases than those with lower ratings.
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Common Issues: Reviews often highlight any recurring problems with specific battery tenders. Users might report issues related to design flaws, compatibility with battery types, or customer service experiences. Recognizing these potential drawbacks can save buyers from making a poor investment.
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Comparison Guidance: User ratings can assist in directly comparing multiple products. By analyzing ratings and reviews side by side, consumers can make informed decisions based on collective experiences rather than just marketing claims. This comparative look allows for a more informed selection process.
In summary, user reviews and ratings serve as a valuable resource for understanding the overall performance, reliability, and satisfaction associated with solar powered automotive battery tenders, helping potential buyers make more informed and confident choices.
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