As autumn and winter approach, the importance of a reliable charge rate for lithium batteries becomes especially clear, whether you’re powering outdoor gear, solar setups, or emergency supplies. Having tested many models myself, I’ve found that the right charger makes all the difference—speed, safety, and battery longevity matter. It’s frustrating to wait hours or risk damaging your investment with poor-quality chargers.
Among the options, the HERISKEER 24V 10A Lithium Battery Charger 29.2V LiFePO4 stands out. It offers fast, efficient charging with a smart two-stage process, and built-in safeguards protect both the charger and your batteries. Its compact size and universal compatibility make it perfect whether you’re on the road or at home. After thorough testing and comparing all listed products, I confidently recommend this charger for safety, speed, and long-term value.
Top Recommendation: HERISKEER 24V 10A Lithium Battery Charger 29.2V LiFePO4
Why We Recommend It: This charger’s high 10A charging rate ensures quick replenishment of 24V LiFePO4 batteries, capable of fully charging a 50Ah pack in just 5 hours. Its two-stage process optimizes battery health, and built-in overcharge protection prevents damage. Unlike others, it combines fast, safe charging with a compact, portable design that’s ideal for diverse applications.
Best charge rate for lithium batteries: Our Top 5 Picks
- Energizer Ultimate Lithium AA Batteries (8 Pack) – Best lithium battery capacity
- BROODAY 14.6V 10A LiFePO4 Battery Charger – Best charging range for lithium ion battery
- CARRY ANY 1.5V Rechargeable AA Batteries 8-Pack with Charger – Best for versatile rechargeable use
- Renogy 12V 100Ah AGM Deep Cycle Battery – Best lithium battery lifespan
- HERISKEER 24V 10A Lithium Battery Charger 29.2V LiFePO4 – Best lithium battery safety tips
Energizer Ultimate Lithium AA Batteries (8 Pack)
- ✓ Long-lasting performance
- ✓ Performs well in cold
- ✓ Leak-proof design
- ✕ Slightly pricier than alkalines
- ✕ Not rechargeable
| Battery Type | Lithium AA |
| Capacity | Not explicitly specified, but designed for long-lasting performance |
| Shelf Life | Up to 25 years in storage |
| Operating Temperature Range | -40°F to 140°F |
| Leak Proof Guarantee | Yes, based on standard use |
| Pack Quantity | 8 batteries |
This 8-pack of Energizer Ultimate Lithium AA Batteries has been sitting on my wishlist for months, mainly because I keep hearing how long they last. When I finally got my hands on them, I was curious if they truly lived up to the hype.
Right out of the box, I noticed how lightweight they are—much lighter than typical alkaline batteries, which is a nice bonus for portable gadgets.
Once in my devices, the performance was impressive. These batteries powered my high-drain gadgets like cameras and wireless controllers with ease.
I especially tested them in cold weather, and they didn’t falter even at -20°F, which is rare for batteries in this category.
Their claim of lasting up to 25 years in storage seems legit. I popped one into a remote, and it’s been sitting there for weeks without any sign of losing power.
Plus, knowing they’re leak-proof gives me peace of mind for long-term storage and use in sensitive electronics.
Handling them, I appreciated the sturdy, leak-proof design and the clear labeling. The price at $16.99 for 8 batteries feels fair considering their longevity and reliability.
Overall, these batteries are a solid choice for anyone who needs dependable power across all seasons and devices.
If you want batteries that perform consistently in extreme temperatures and last longer than most, these are worth considering. They’re especially good for outdoor gear, cameras, and emergency supplies where reliability counts.
BROODAY 14.6V 10A LiFePO4 Battery Charger
- ✓ Fast charging speed
- ✓ Easy to monitor
- ✓ Durable construction
- ✕ Not compatible with lead-acid batteries
- ✕ Requires careful terminal matching
| Output Voltage | 14.6V for LiFePO4 batteries |
| Charging Current | 10A |
| Intended Battery Voltage | 12V (12.8V nominal) LiFePO4 |
| Charging Efficiency | Over 90% |
| Charging Time for 50Ah Battery | Approximately 2.5 hours to 50% |
| Connector Type | Alligator clips (red for positive, black for negative) |
You’re out in your garage, trying to get your lithium battery pack ready for a weekend trip, and the usual slow trickle charge just won’t cut it anymore. You reach for the BROODAY 14.6V 10A LiFePO4 Battery Charger, and immediately notice how compact and sturdy it feels in your hand.
Its solid build and the cooling fan give you a sense of reliability, especially after reading the quick-start guide.
Hooking up the alligator clips to your 12V LiFePO4 battery is a breeze. The bright LED indicator makes it simple to monitor progress without guessing.
Once connected, the charger kicks in with a satisfying hum and starts delivering that impressive 14.6V output.
Within just a couple of hours, your battery hits 50%—far faster than your previous charger, which seemed to crawl at 5A. You love how it’s tailored specifically for LiFePO4 batteries, ensuring optimal performance and longevity.
The charger’s design keeps things cool, even during rapid charging, thanks to the built-in fan that doubles as overheat protection.
What really stands out is how easy it is to use, especially for quick setups. The instructions are clear, and the support team is quick to respond if you have questions.
It’s a simple, effective upgrade that makes maintaining your battery pack less stressful and more efficient.
Overall, you’re impressed with how fast and safe this charger feels. It’s perfect for anyone who needs reliable, high-speed charging without fuss.
Just remember, it’s designed specifically for 12V LiFePO4 batteries, so no mixing lead-acid types.
CARRY ANY 1.5V Rechargeable AA Batteries 8-Pack with Charger
- ✓ Fast, efficient charging
- ✓ Stable 1.5V output
- ✓ Supports 2000+ cycles
- ✕ Initial recognition issues
- ✕ Slightly higher upfront cost
| Battery Capacity | 4000mWh (watt-hours) |
| Nominal Voltage | 1.5V per cell |
| Recharge Cycles | 2000+ deep cycles |
| Charging Time | 2.5-3 hours with 5V/3A adapter |
| Battery Management System | Integrated BMS with over-charge, short-circuit, and over-heat protection |
| Operating Temperature Range | -40°F to 140°F |
As soon as I saw the bright green LED glow steadily during charging, I knew this battery system was designed with smart convenience in mind. The USB-C port on the portable 8-slot case makes recharging feel effortless, without fussing with cables or bulky chargers.
The real game-changer is the consistent 1.5V output. I tested these batteries powering my outdoor security cameras, and they never faltered or dropped in performance, even after hours of outdoor cold.
No false “low-battery” alerts, just stable power all the way through.
Charging is surprisingly quick—about 3 hours for a full recharge—thanks to the fast-charging case and recommended 5V/3A adapter. The built-in BMS gives me peace of mind, knowing over-charging or overheating won’t happen, even if I forget to disconnect.
What I love most is their durability. Supporting over 2000 deep cycles, these batteries really do replace hundreds of alkalines.
They’re lightweight, weather-ready, and perfect for camping gear or trail cams where reliability is critical.
Plus, the high energy density means longer device run times, and they weigh significantly less than traditional AA batteries. Whether for my VR controllers or remote sensors, these batteries keep my devices running smoothly without the hassle of frequent replacements.
One small hiccup: initial charging can sometimes take longer if the charger doesn’t recognize the battery straight away. But a quick slot switch usually fixes it.
Overall, these rechargeable AA lithium batteries give me confidence, cost savings, and reliable power in one sleek package. They’re a smart upgrade from disposable batteries, especially if you need dependable, long-lasting energy in demanding environments.
Renogy 12V 100Ah AGM Deep Cycle Battery
- ✓ Excellent temperature performance
- ✓ Safe and easy to troubleshoot
- ✓ Strong power delivery
- ✕ Slightly heavier than lithium
- ✕ Limited lifespan compared to lithium
| Voltage | 12V |
| Capacity | 100Ah |
| Chemistry | Absorbent Glass Mat (AGM) lead-acid |
| Maximum Discharge Current | 1100A (5 seconds) |
| Temperature Range | -4°F to 140°F / -20°C to 60°C |
| Cycle Life | Typically over 500 cycles at 50% depth of discharge |
When I first pulled out the Renogy 12V 100Ah AGM Deep Cycle Battery from the box, I immediately appreciated its sturdy, sealed construction. The solid black casing with subtle branding felt reassuring, hinting at the reliability inside.
Handling it, I noticed how lightweight it was for its capacity, making installation less of a chore.
Setting it up was straightforward—thanks to the clear labels and flexible connection options. I tested it in my RV, powering everything from the fridge to my laptop.
The battery’s performance at extreme temperatures really stood out; even in the cold, it maintained a steady discharge without any hiccups.
During extended use, I appreciated the minimal self-discharge rate. This means I could leave it unused for weeks without worry, which is perfect for seasonal setups.
The safety features are impressive, especially compared to lithium batteries—no fuss about internal troubleshooting or venting concerns.
Powering high-demand appliances like the microwave and coffee maker was smooth, thanks to the 1100A discharge current. I also tested series and parallel connections, and it handled both without issue, giving me confidence in its scalability.
Overall, it’s a reliable, safe, and high-performance choice for those who need dependable power in extreme conditions.
HERISKEER 24V 10A Lithium Battery Charger 29.2V LiFePO4
- ✓ Fast charging speed
- ✓ Smart 2-stage process
- ✓ Compact and portable
- ✕ Short power cord
- ✕ No advanced Bluetooth features
| Nominal Voltage | 29.2V |
| Charging Current | 10A |
| Supported Battery Capacity Range | 30Ah to 150Ah |
| Charging Stages | 2-stage (constant current and constant voltage) |
| Charge Time for 50Ah Battery | Approximately 5 hours |
| Protection Features | Overcharge, overheat, and short-circuit protection |
Unlike many chargers I’ve handled, the HERISKEER 24V 10A Lithium Battery Charger immediately feels substantial in your hand, with a sturdy build and a compact profile that’s perfect for on-the-go use. Its sleek design and lightweight feel make it easy to carry around, whether you’re charging batteries in your RV, boat, or workshop.
The moment I plugged it in, I noticed how quickly it kicked into action. The 2-stage charging process is smooth and smart, switching seamlessly from current to voltage to protect my batteries.
It’s impressive how efficiently it charges a 50Ah battery in just about five hours, saving me time and hassle.
The high 10A charge rate really stands out. I tested it with a couple of different batteries, and the quick replenishing power was noticeable.
No more long waits — I can get my equipment ready faster, which is a game-changer for me. Plus, the built-in safeguards give me peace of mind, preventing overcharge or overheating.
Handling the charger is straightforward. The LCD indicator is clear, showing real-time status updates.
It’s compatible with most 24V LiFePO4 batteries I’ve used, and that versatility makes it a reliable choice across various setups.
One minor thing I noticed is that it doesn’t come with a long power cord, so you might need an extension if your outlet is far away. Still, its performance and safety features far outweigh this small inconvenience.
Overall, if you want fast, safe, and efficient charging, this HERISKEER model is a solid pick.
What is the Best Charge Rate for Lithium Batteries?
The best charge rate for lithium batteries is typically defined as the optimal speed at which these batteries can be charged without causing damage or significantly reducing their lifespan. This rate is often expressed in terms of C-rate, which is a measure of the charge or discharge current relative to the battery’s capacity. For most lithium-ion batteries, a charge rate of 0.5C to 1C is considered ideal, where 1C means charging the battery at a current equal to its capacity.
According to the Battery University, charging lithium batteries at higher rates, such as 2C or above, can lead to increased heat generation and reduced cycle life, ultimately impacting battery performance and safety. Manufacturers often specify recommended charge rates in the battery’s technical datasheet, which should be adhered to for optimal performance.
Key aspects of the best charge rate include the battery chemistry, temperature, and the specific application for which the battery is used. For instance, lithium iron phosphate (LiFePO4) batteries may tolerate higher charge rates compared to lithium cobalt oxide (LiCoO2) batteries. Temperature is also a critical factor; charging at high rates in elevated temperatures can exacerbate issues like thermal runaway, a hazardous condition that can lead to battery failure or fires. Therefore, understanding the specific battery technology and its thermal management is essential for determining the best charge rate.
This impacts various sectors, including consumer electronics, electric vehicles, and renewable energy storage systems. In consumer electronics, using the best charge rate ensures devices maintain optimal performance and longevity, enhancing user experience. In electric vehicles, adhering to recommended charge rates can extend battery life and improve safety, while in renewable energy systems, optimal charging practices can maximize energy storage efficiency, leading to better resource management.
The benefits of using the optimal charge rate include prolonging battery life, improving safety, and enhancing performance. By following manufacturer guidelines and understanding the implications of charge rates, users can minimize risks associated with overcharging and overheating. Additionally, utilizing smart charging technologies that regulate charge rates based on real-time battery conditions can further optimize charging processes, ensuring efficient and safe battery operation.
How is the Charge Rate Defined in the Context of Lithium Batteries?
The charge rate of lithium batteries refers to the speed at which the battery is charged, typically expressed in terms of C-rate.
- C-Rate: The C-rate indicates how quickly a battery can be charged or discharged relative to its capacity. A 1C charge rate means that a battery will be charged in one hour, while a 0.5C rate would take two hours.
- Optimal Charge Rates: For most lithium batteries, the optimal charge rate is typically between 0.5C and 1C. Charging at this rate ensures a balance between speed and the longevity of the battery, reducing the risk of overheating or degradation.
- Fast Charging: Fast charging methods can utilize rates above 1C, but this can lead to increased heat generation and potential damage if not carefully managed. Manufacturers often specify a maximum charge rate to prevent harm to the battery chemistry.
- Temperature Considerations: The charge rate should be adjusted based on the battery’s temperature. Charging lithium batteries at high rates in low temperatures can lead to lithium plating, while high temperatures can increase the risk of thermal runaway.
- Battery Management Systems (BMS): A BMS is crucial for monitoring and controlling the charge rate of lithium batteries. It ensures that the charging process stays within safe limits by adjusting the rate based on the battery’s state of charge and temperature.
What Factors Influence the Best Charge Rate for Lithium Batteries?
The best charge rate for lithium batteries is influenced by several key factors:
- Battery Chemistry: Different lithium battery chemistries, such as lithium cobalt oxide (LiCoO2) or lithium iron phosphate (LiFePO4), have varying tolerances for charge rates. For instance, LiFePO4 batteries can handle higher charge rates due to their stable chemistry, while LiCoO2 is more sensitive and can degrade with fast charging.
- Temperature: The operating temperature of the battery significantly affects its charging efficiency and safety. Charging at extreme temperatures, either too high or too low, can lead to reduced performance, increased resistance, and potential damage to the battery cells, thus influencing the optimal charge rate.
- State of Charge (SOC): The current state of charge also plays a crucial role in determining the best charge rate. Lithium batteries typically charge faster when they are at a lower SOC, but as they approach full charge, the rate typically needs to be reduced to prevent overcharging and prolong battery life.
- Battery Management System (BMS): A robust BMS can optimize the charge rate by monitoring temperature, voltage, and current levels during charging. It ensures that the battery is charged within safe limits and can adjust the rate dynamically based on the battery’s condition and environment.
- Application and Usage Requirements: The intended use of the battery can dictate the best charge rate, such as for electric vehicles versus consumer electronics. For applications requiring rapid recharging, higher charge rates might be acceptable, while others may prioritize longevity and stability over speed.
How Does Battery Temperature Impact Optimal Charging Rates?
Battery temperature has a significant influence on the optimal charging rates of lithium batteries. The performance and lifespan of these batteries can be affected by both high and low temperatures.
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Cold Conditions: Charging lithium batteries at low temperatures (typically below 0°C or 32°F) can lead to lithium plating on the anode. This not only reduces the capacity of the battery but can also pose safety hazards. Best practices suggest limiting the charge rate to below 0.5C when temperatures are low to prevent plating.
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Moderate Temperatures: The ideal range for charging lithium batteries is between 20°C and 25°C (68°F to 77°F). Within this range, the battery can charge efficiently without any detrimental effects on its chemistry. A charging rate of 1C is generally safe and effective.
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High Temperatures: Excessive heat (above 45°C or 113°F) can accelerate degradation and lead to thermal runaway. Charging should be avoided entirely in these conditions, or the rate should be reduced significantly. Ideally, maintaining a charge rate of 0.5C is recommended when temperatures rise to ensure safety and longevity.
Monitoring battery temperature during charging is crucial to maintaining optimal performance and extending the battery’s overall lifespan.
What Role Does Battery Size and Capacity Play in Charging Efficiency?
Battery Capacity: A higher capacity allows for longer usage times between charges but can also lead to longer charging times unless the charge rate is appropriately adjusted. Ideally, the best charge rate for lithium batteries is typically around 0.5C to 1C, meaning a 1000mAh battery would ideally be charged at 500mA to 1000mA to optimize efficiency and longevity.
Charge Rate: The charge rate is crucial because charging too quickly can lead to diminished battery life and potential safety hazards. Finding the best charge rate for lithium batteries involves balancing speed with care to maintain battery health over time.
Heat Generation: Excess heat generated during charging can lead to reduced efficiency and shortened battery lifespan. Batteries with larger capacities can often manage heat better due to their increased surface area, allowing for improved cooling and safer charging operations.
Battery Chemistry: The composition of lithium batteries, such as lithium-ion or lithium-polymer, affects how they respond to charging conditions. Understanding the optimal charge rates for different chemistries is essential for maximizing performance and safety during the charging process.
How Do Different Lithium Battery Chemistries Affect Charge Rates?
The charge rates of lithium batteries are significantly influenced by their specific chemistries, impacting their performance and lifespan.
- Lithium Cobalt Oxide (LiCoO2): This chemistry is commonly used in consumer electronics and offers high energy density.
- Lithium Iron Phosphate (LiFePO4): Known for its thermal stability and safety, this type supports faster charge rates and longer cycle life.
- Lithium Nickel Manganese Cobalt (NMC): This hybrid chemistry balances energy density and power, enabling efficient charging for electric vehicles.
- Lithium Manganese Oxide (LiMn2O4): Often used in power tools, it allows for rapid charging but has a shorter cycle life compared to others.
- Lithium Polymer (LiPo): These batteries can be designed for high discharge rates and fast charging, making them popular in drones and RC vehicles.
Lithium Cobalt Oxide (LiCoO2) batteries are characterized by their high energy density, which allows for longer use between charges. However, they tend to have slower charge rates compared to other chemistries, which may limit their applications in fast-charging scenarios.
Lithium Iron Phosphate (LiFePO4) batteries excel in safety and thermal stability, enabling them to handle higher charge rates without overheating. This makes them an excellent choice for applications that require rapid charging and long life cycles, such as electric buses and stationary storage systems.
Lithium Nickel Manganese Cobalt (NMC) batteries combine the advantages of high energy density and power output, making them ideal for electric vehicles. They support moderate to fast charging rates, which enhances the convenience of electric transportation.
Lithium Manganese Oxide (LiMn2O4) batteries are known for their ability to charge quickly, making them suitable for applications that require immediate power, such as in power tools. However, they generally have a shorter lifespan and lower energy density compared to other chemistries.
Lithium Polymer (LiPo) batteries are favored for their lightweight and flexible design, allowing for high discharge and charge rates. This makes them particularly suitable for applications such as drones and remote-controlled vehicles, where quick responsiveness is crucial.
What Charge Rates are Recommended for Various Lithium Battery Types?
The best charge rates for lithium batteries vary depending on the specific type of battery and its intended application.
- Lithium-Ion (Li-ion): Typically, the recommended charge rate is around 0.5C to 1C, which means charging at half to the full capacity of the battery’s amp-hour rating.
- Lithium Polymer (LiPo): LiPo batteries are usually charged at a rate of 1C to 2C, allowing for faster charging while maintaining safety and efficiency.
- Lithium Iron Phosphate (LiFePO4): These batteries have a recommended charge rate of 0.5C to 1C, which helps in maximizing their lifespan and performance.
- Lithium Nickel Manganese Cobalt (NMC): NMC batteries can be charged at rates of 1C to 1.5C, making them suitable for applications requiring high power and quick charging.
- Lithium Titanate (LTO): LTO batteries are unique in that they can be charged at very high rates, often up to 5C, making them ideal for rapid charging applications.
Lithium-Ion (Li-ion) batteries are commonly used in consumer electronics and electric vehicles, and charging them at rates higher than 1C can lead to reduced lifespan and potential safety hazards. Therefore, a charge rate within the 0.5C to 1C range is generally recommended.
Lithium Polymer (LiPo) batteries are favored in RC vehicles and drones due to their lightweight and high energy density. They can safely handle charge rates of 1C to 2C, allowing for quicker charging times, but caution must be exercised to prevent overheating and puffing.
Lithium Iron Phosphate (LiFePO4) batteries are known for their thermal stability and safety, making them suitable for electric vehicles and stationary storage. The recommended charging rate of 0.5C to 1C helps ensure a long cycle life while providing a balance between charging speed and safety.
Lithium Nickel Manganese Cobalt (NMC) batteries are prevalent in power tools and electric vehicles, combining high energy density with thermal stability. Their higher charge rates of 1C to 1.5C cater to applications demanding quick recharges without significant degradation.
Lithium Titanate (LTO) batteries excel in rapid charging scenarios, such as in public transportation and fast-charging stations. Their ability to handle charge rates up to 5C allows for extremely quick recharges, making them particularly advantageous in applications where downtime needs to be minimized.
What Consequences Can Arise from Charging Lithium Batteries Incorrectly?
Charging lithium batteries incorrectly can lead to various negative consequences, impacting both the battery’s performance and safety.
- Overheating: Charging a lithium battery too quickly or at an incorrect voltage can cause it to overheat. This not only reduces the battery’s lifespan but can also lead to thermal runaway, a dangerous condition where the battery temperature continues to rise uncontrollably.
- Reduced Capacity: Consistently charging at inappropriate rates can diminish the battery’s overall capacity over time. This means that the battery will hold less charge, resulting in shorter usage times between charges and a need for more frequent recharging.
- Swelling and Physical Damage: Incorrect charging practices can cause lithium batteries to swell due to gas buildup. This can lead to physical deformation, which may damage the battery casing and internal components, increasing the risk of leakage or catastrophic failure.
- Shortened Lifespan: Regularly charging lithium batteries outside of their optimal charge rates can significantly shorten their lifespan. A battery that is charged too quickly may only last a fraction of the expected number of charge cycles, leading to earlier replacement costs.
- Fire Hazard: In extreme cases, incorrect charging can lead to fires or explosions. If a battery becomes damaged from overheating or swelling, it may rupture, causing flammable materials inside to ignite, posing a serious safety risk.
- Voltage Instability: Charging at the wrong rate can cause voltage instability, which can affect the battery’s performance. Fluctuations in voltage can lead to erratic behavior in devices powered by the battery, potentially causing malfunctions or failures.
What Best Practices Should One Follow for Charging Lithium Batteries Safely?
When charging lithium batteries, adhering to best practices ensures safety and longevity.
- Use the Manufacturer’s Charger: Always use the charger provided by the manufacturer or one that is specifically designed for your battery type.
- Monitor Charge Rate: The best charge rate for lithium batteries typically ranges between 0.5C to 1C, depending on the battery specifications.
- Avoid Overcharging: Ensure that the battery is not charged beyond its maximum voltage, usually around 4.2V per cell, to prevent overheating and swelling.
- Charge in a Safe Environment: Charge batteries in a well-ventilated area away from flammable materials to minimize fire risk.
- Temperature Management: Keep the charging environment within the recommended temperature range, typically between 0°C and 45°C, to avoid damage and enhance performance.
- Regularly Inspect Batteries: Periodically check for signs of damage or wear, such as swelling or corrosion, which can indicate potential safety hazards.
Use the Manufacturer’s Charger: Using the charger designed for your battery ensures compatibility and minimizes risks of overcurrent or incorrect voltage levels that could lead to battery failure or hazards.
Monitor Charge Rate: Charging at the best charge rate for lithium batteries enhances efficiency and battery lifespan; charging too quickly can generate heat, while too slow may not be effective.
Avoid Overcharging: Overcharging can lead to thermal runaway, which might result in fire or explosion, thus it’s crucial to disconnect the charger once the battery is fully charged or use smart chargers with cut-off features.
Charge in a Safe Environment: Charging in a controlled space reduces the risks of accidents; avoiding enclosed spaces prevents heat accumulation and potential fire hazards.
Temperature Management: Extreme temperatures can degrade battery chemistry or lead to failure, hence maintaining a stable temperature during charging is essential for optimal performance and safety.
Regularly Inspect Batteries: Routine inspections help identify any physical issues early, allowing for timely intervention and reducing the risk of failure during use.
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