Our name, WattCycle (read: [wɒtˈsaɪkl]), is a tribute to the pioneering Scottish engineer James Watt, widely recognized as the "Father of the Steam Engine."

Just as James Watt's steam engine revolutionized power generation, WattCycle batteries aim to revolutionize clean and sustainable energy storage solutions.

We believe that the name WattCycle reflects our commitment to honoring the past while forging a path towards a cleaner and more sustainable energy future.

A: Yes!

The reasons why WattCycle LiFePO4 batteries are safe are as follows :

1. Thermal Stability: Lithium iron phosphate (LiFePO4) and other types of lithium batteries have better thermal stability, making them less prone to overheating and thermal runaway, thereby reducing the risk of fire and explosion.

2. Weight and Volume: LiFePO4 batteries are much lighter than lead-acid batteries, making them safer in the event of collisions or vibrations, reducing the likelihood of physical damage.

3. Low Self-Discharge Rate: LiFePO4 batteries have a much lower self-discharge rate compared to lead-acid batteries, meaning they retain their charge better over long storage periods, reducing the risk of over-discharge.

4. Intelligent Management System: All LiFePO4 batteries from WattCycle are equipped with a Battery Management System (BMS) that monitors voltage, temperature, and current, providing protection against overcharging, over-discharging, overheating, and short circuits, ensuring safe operation of the battery.

5. No Leakage Risk: LiFePO4 batteries do not contain liquid electrolytes, so there is no risk of electrolyte leakage like in lead-acid batteries, reducing harm to users and the environment.

6. Environmental Friendliness: LiFePO4 batteries have a smaller environmental impact during manufacturing, use, and disposal. They do not contain harmful heavy metals such as lead and cadmium, reducing environmental and health hazards.

These characteristics make LiFePO4 batteries safer in various application scenarios, including consumer electronics, electric vehicles, and energy storage systems.

The reasons why LiFePO4 batteries are relatively more expensive than lead-acid batteries are as follows:

1) Material Costs: LiFePO4 batteries use lithium and other materials that are relatively expensive compared to the lead used in lead-acid batteries. The prices of rare metals such as lithium, cobalt, and nickel, which are used in LiFePO4 batteries, fluctuate significantly, directly impacting manufacturing costs.

2) Technological Complexity: The manufacturing process of LiFePO4 batteries is more complex and requires higher-level technology and equipment, including precise production processes and strict quality control. In contrast, the manufacturing process of lead-acid batteries is relatively simple, with lower technological barriers, hence lower costs.

3) Energy Density: LiFePO4 batteries have higher energy density, meaning they can provide more energy in the same volume and weight. Achieving this high energy density requires the use of more high-performance materials and advanced manufacturing processes, thereby increasing costs.

4) Research and Development Investment: Significant investments are made in LiFePO4 battery technology research and development, including material research, battery structure design, battery management systems, etc. These R&D costs are also directly reflected in the price of batteries.

Although LiFePO4 batteries have higher initial investment costs, they may have lower overall costs in the long run due to their higher energy density, longer lifespan, and lower maintenance costs. Therefore, despite the higher initial investment, LiFePO4 batteries are still considered more economical and feasible in some applications. Undoubtedly, the transition from traditional lead-acid batteries to LiFePO4 batteries has become a major trend.

First, please identify our brand, WattCycle (W-A-T-T-C-Y-C-L-E).
Secondly, our only official website is: https://www.wattcycle.com/

Company Address:
Shenzhen Washi Energy Co., Ltd.
Room A503, Building A, Lankun Group, Baoshi Road, Dajingshan, Buxin Community, Xin'an Street, Baoan District, Shenzhen

Contact:
1) Customer Support:
service@wattcycle.com (24/7 Support)
2) PR & Influencer:
marketing@wattcycle.com
3) Distributors:
sales.us@wattcycle.com

If you discover any counterfeit products, please contact the WattCycle team immediately. Thank you for your support.

WattCycle batteries are UN 38.3 certified and constructed using the highest quality Grade A+ prismatic cells, ensuring you receive the ampere-hour capacity you deserve. Our batteries undergo rigorous IEC62619 testing and hold UL certification on the prismatic cells. Additionally, they are certified for Safety Data Sheets (SDS), CE, RoHS, and FCC compliance.

WattCycle LiFePO4 batteries are housed in an IP67-rated case, ensuring protection against water ingress from any direction. However, it's crucial to remember that water and electricity don't mix well.

Extended exposure to a high-moisture environment could potentially lead to water seeping into the battery, resulting in irreversible damage. Therefore, we strongly advise you to make every effort to keep your batteries dry.

You can get the size information under the product title line or check the tech specs in the listing.
The size of batteries at WattCycle is measured in feet. If you need size reference for other units, please contact our after-sales team. (service@wattcycle.com)

To determine the size of the lithium battery you need, it's essential to clarify the specifications required. Here are some factors to consider:

1) Applicable Scenarios: Different battery types have unique characteristics and are suitable for various scenarios. For instance, if you're powering an RV, you'll need a lithium battery with sufficient capacity and voltage to ensure stable and continuous operation. For this purpose, a 12V 200Ah battery would be more suitable than a 12V 8Ah one.

2) Battery Capacity: Battery capacity, measured in ampere-hours (Ah), indicates the energy storage capability of the battery. Assess your device's power requirements and usage time to determine the necessary battery capacity.

3) Voltage: While the standard voltage for WattCycle batteries is 12V, you can adjust by connecting batteries in series. For example, connecting two WattCycle LiFePO4 batteries in series will create a 24V battery system.

4) Cycle Life and Safety: Consider the battery's cycle life and safety performance, especially for long-term use and applications with stringent safety requirements.

5) Cost and Performance: Balance the cost and performance aspects of the battery to meet your requirements effectively.

In summary, by determining the specifications of the lithium battery you need, you can ascertain its size. For customized options tailored to your specific needs, feel free to reach out to the WattCycle team at service@wattcycle.com.

To determine the compatibility between WattCycle LiFePO4 Battery and your device, you should consider several factors:

1) Voltage Compatibility: Ensure that the voltage output of the WattCycle LiFePO4 Battery matches the voltage requirement of the device. Connecting a battery with a different voltage could damage the device or the battery.

2) Capacity and Runtime: Check if the capacity (measured in ampere-hours, Ah) of the WattCycle LiFePO4 Battery is sufficient to meet the power demands of the device. Ensure that the battery can provide enough energy to power the device for the desired duration.

3) Physical Dimensions: Verify that the physical size and shape of the WattCycle LiFePO4 Battery allow it to fit into the battery compartment or housing of the device. Make sure there is enough space and that the battery connections align properly. (for future needs)

4) Charging and Discharging Rates: Check if the WattCycle LiFePO4 Battery can handle the charging and discharging rates required by the device. Ensure compatibility in terms of maximum charge/discharge current and recommended charging/discharging protocols.

5) Safety Considerations: Evaluate the safety features of both the lithium battery and the device to ensure they meet relevant safety standards and regulations. Consider factors such as overcharging protection, short circuit protection, and temperature management. All WattCycle Batteries are equipped with BMS system, which ensures that no safety accidents will occur during normal use.

6) Manual Recommendations: Refer to the device manual's specifications and recommendations regarding compatible battery types and models. They often provide guidance on the type and specifications of batteries suitable for use with their devices.

All in all, before buying, you just need to figure out the parameters of the connected device you want and the parameters of our battery (shown on the listing) to ensure the compatibility. Then you can safely and effectively use WattCycle LiFePO4 Battery with your devices. If you are unsure about the  compatibility, consult with the WattCycle team (service@wattcycle.com) for further guidance.

You can get the parameters in the sheet of tech specs. And as for the manuals, they come with the products in the copy of paper. If your manuals is lost or you need the electronic version, you can contact with our team. (service@wattcycle.com)

DOD is an abbreviation for "Depth of Discharge," which indicates the percentage of battery capacity that has been discharged, typically represented as a percentage. For example, a battery with a DOD of 50% means that half of its rated capacity has been discharged.

In the usage of lithium batteries, controlling DOD is crucial. Deep discharge often accelerates the deterioration of lithium battery lifespan. Therefore, maintaining DOD at lower levels can prolong the lifespan of lithium batteries. It is generally recommended to keep DOD below 80% to ensure the long-term health and performance of the battery.

Yes, all WattCycle batteries are equipped with a low-temperature cut-off function. This feature automatically halts charging when the temperature drops below 0℃ (32°F).

WattCycle LiFePO4 battery can be used for 5,000-15,000 life cycles.
Depending on usage, it can be used 10 years or more. At same time, we provide a FREE 5-year warranty.

Lead acid and AGM get roughly 300-500 life cycles before their capacity is reduced substantially.
Therefore, even though there is more upfront cost with a WattCycle LiFePO4 Battery, the upgraded saves you big in a long run.

You can check the battery voltage with a moniter.
If you don't have a battery monitor, you can use a multimeter to monitor the voltage.

Battery capacity can be roughly estimated by the following voltage method.
Test steps:
1. Disconnect the charger or load.
2. Let it sit for 15 minutes.
3. Test the open circuit voltage.

No. WattCycle LiFePO4 battery can not be used as starting batteries but energy storage, please do not use them to start any devices.

Generally speaking, WattCycle LiFePO4 Battery is suitable for the following temperature ranges:

1. Charging temperature range: usually between 32°F (0°C) and 122°F (55°C). Within this temperature range, battery charging efficiency is highest and safety is optimal.

2. Discharge temperature range: Usually between 14°F (-10°C) and 122°F (50°C). Within this temperature range, the battery can provide good performance and stable output.

3. Storage temperature range: usually between -4°F (-20°C) and 128°F (70°C). Within this temperature range, the battery maintains its capacity and performance without being damaged.

It is important to note that exceeding these temperature ranges may negatively affect the performance and safety of lithium batteries. Under extreme temperatures, lithium batteries can become damaged, permanently damaged, or even cause safety issues. Therefore, when using and storing lithium batteries, you should try to avoid exposing them to extreme temperatures, and try to use and store the batteries within the specified temperature range.

The default of the new factory battery is 30%-50% remaining, the first time need to be fully charged before use.

There are three methods for charging, (for example to charge 12V 100Ah battery):

Solar Panels
With 300W solar panels, the battery can be fully charged in one day, given 4.5 hours of effective sunlight. If using panels rated at or above 300W, charging might take longer due to varying light conditions.

Apart from solar panels, here are two other charging methods:

Generator/Alternator
For DC output from an alternator or generator, use a DC-to-DC charger to connect to the battery. For AC output, a suitable battery charger is needed. Recommended Charging Voltage: 14.2V - 14.6V. Recommended Charging Current:

20A (0.2C): Fully charges the battery to 100% in about 5 hours.
50A (0.5C): Charges the battery to approximately 97% in about 2 hours.

LiFePO4 Dedicated Chargers
For charging a 12V battery, a 14.6V charger is recommended.
Recommended Charging Voltage: 14.2V - 14.6V. Recommended Charging Current:

20A (0.2C): Fully charges the battery to 100% in about 5 hours.
50A (0.5C): Charges the battery to approximately 97% in about 2 hours.

The recommended fully charge voltage is 14.2-14.6V(12V batteries). And the charging rate is 0.2C. For example, the charging current for 12v 100Ah is 20A and 12V 200Ah is 40A.

The WattCycle 12V 12Ah battery capacity means it can deliver 12 ampere hours (Ah) of power under ideal conditions. The duration depends on the power requirements of the connected device. In general, the following formula can be used to estimate the battery's duration:

Duration (Hours) = Battery Capacity (Ah) / Device Power (in Watts, W)

For example, if the device has a power of 60W, then:

Duration (hours) = 12Ah / 60W = 0.2 hours = 12 minutes

This is an estimate under ideal circumstances. In actual use, the battery duration may be affected by various factors, such as temperature, usage environment, equipment efficiency, etc.

Yes, it will get hot during charging. This is because when charging, the current passing through the battery causes an internal chemical reaction in which some of the energy is converted into heat. This internal reaction causes the battery to generate heat, so the surface of the battery will feel warm and sometimes even become hot.

The amount of heat generated depends on a variety of factors, including the battery's charging rate, charger design, ambient temperature, and the condition of the battery (for example, whether the battery is over-discharged). Under normal use conditions, moderate heat is normal, but if the battery is abnormally hot, it may indicate a problem that requires inspection and treatment.

Charging it overnight will usually not damage the battery, provided you are using a suitably designed charger and the battery itself is in good condition.

At the same time, our battery is installed with 12A BMS.
BMS monitors the voltage of the battery, and once it detects that the voltage reaches the preset overcharge threshold, it will take measures to stop charging. This is usually accomplished by cutting off the charging current or sending a signal to the charger to stop charging. This prevents the battery from continuing to receive charging and causing the voltage to exceed the safe range, thereby avoiding overcharging.

However, charging for a long time may increase the temperature of the battery, which may have a certain impact on the battery life.
To maximize the life of your battery, it is recommended to follow the charging recommendations and to regularly check the status of your battery.
If you are concerned about the safety or longevity of your battery, consider using a smart charger with an auto-stop function, as well as regular battery inspection and maintenance

The charger is not included in the package. We sell the charger for the 12V 100Ah, 12V 100Ah and 12V 200Ah LiFePO4 Batteries. It is recommended to buy these batteries with the charger. 

For lithium batteries of other specifications, we recommend that you purchase a charger separately.

1. Battery capacity and voltage: Make sure the charger can support the capacity and voltage of the lithium battery you are using. Choose a charger that provides the correct voltage and appropriate current.

2. Charging speed: Some chargers have faster charging speeds, while others are slower. Consider your needs and preferences to choose the right charging speed.

3. Safety functions: Choose a charger with safety functions, such as overcharge protection, overcurrent protection and short circuit protection. These features ensure a safe and reliable charging process.

4. Brand and quality: Choose a well-known brand and charger with reliable quality to ensure charging effect and safety. Avoid using cheap or low-quality chargers that may damage your battery or pose a safety risk.

5. Portability and functionality: Consider the portability and additional features of the charger, such as charging indicator light, USB output, etc. These features may increase the charger's utility and convenience.

6. Charging environment: Consider the charging environment and ensure that the charger is suitable for your usage scenario, such as home, office or outdoors.

To sum up, choosing a suitable lithium battery charger needs to consider many factors such as capacity and voltage requirements, charging speed, safety performance, brand quality, portability and charging environment. Choosing the right charger will ensure your lithium battery is charged safely and efficiently and extend its life.

The difference between series and parallel connections of lithium batteries lies in how they are arranged in the circuit:

1) Series Connection:
- In a series connection, lithium batteries are connected end-to-end, with the positive terminal of one battery connected to the negative terminal of the next.
- This arrangement increases the total voltage of the battery bank while keeping the overall capacity unchanged.
- Each battery's voltage adds up, resulting in a higher total voltage across the circuit.
- The current flowing through each battery remains the same.
- Series connection is often used to increase voltage for applications requiring higher voltage levels.

Eg: Two WattCycle 12V 100Ah LiFePO4 Batteries connected in series, you will get 24V voltage, 100Ah current and 2400Wh battery capacity.
At this time, the voltage increases by 12V, the current remains unchanged, and the battery capacity increases by 2 times.

Series ConnectionsVoltageCurrentCapacityWattCycle 12V 100Ah *112V100Ah1200WhWattCycle 12V 100Ah *224V100Ah2400WhWattCycle 12V 100Ah *336V100Ah3600Wh

2) Parallel Connection:
- In a parallel connection, lithium batteries are connected side by side, with all positive terminals connected together and all negative terminals connected together.
- This arrangement increases the total capacity of the battery bank while keeping the overall voltage unchanged.
- Each battery contributes its capacity to the total capacity of the bank.
- The voltage across each battery remains the same, while the total current capacity is the sum of the capacities of all batteries.
- Parallel connection is often used to increase current capacity for applications requiring higher current levels.

eg: Two WattCycle 12V 100Ah LiFePO4 Batteries connected in parallel, you will get 12V voltage, 200Ah current and 2400Wh battery capacity.
At this time, the current increases by 100Ah, the voltage remains unchanged, and the battery capacity increases by 2 times.

Parallel ConnectionsVoltageCurrentCapacityWattCycle 12V 100Ah *112V100Ah1200WhWattCycle 12V 100Ah *212V200Ah2400WhWattCycle 12V 100Ah *312V300Ah3600Wh

In summary, series connection increases voltage while keeping capacity constant, whereas parallel connection increases capacity while keeping voltage constant.

"4S4P" is a common notation used to describe the configuration of a battery pack, detailing both the series and parallel connections within the pack. Specifically:

4S: Represents four battery cells connected in series.
Series connections increase the total voltage of the battery pack.
For example, if each cell has a voltage of 3.2V, the total voltage after connecting four cells in series would be 4 * 3.2V = 12.8V.

4P: Represents four groups of battery cells connected in parallel.
Parallel connections increase the total capacity (Ah) of the battery pack.
For example, if each cell has a capacity of 8Ah, the total capacity after connecting four groups of cells in parallel would be 4 * 8Ah = 32Ah.

A "4S4P" battery configuration indicates that the battery pack is composed of four cells connected in series to form a series group, and then four of these series groups are connected in parallel.
This configuration allows for an increase in both voltage and capacity simultaneously. Here are the specific parameters for a "4S4P" battery pack:

- Cell voltage: 3.2V
- Cell capacity: 8Ah

Total parameters of the 4S4P battery pack:
- Total voltage: 4 * 3.2V = 12.8V
- Total capacity: 4 * 8Ah = 32Ah

This configuration is commonly used in applications that require higher voltage and larger capacity, such as electric vehicles, power tools, and energy storage systems.

In order for our batteries to perform better and extend their service life, we strongly recommend to store batteries in a stable environment away from direct sunlight, moisture, or damp areas. The ideal storage location is dry, well-ventilated, and away from sources of heat and flammable materials.

If you plan to install the battery inside a device, make sure the internal space of the device and the physical dimensions of the battery are compatible. At the same time, if you need to perform series or parallel operations, you also need to reserve some space to support your future operations.

To ensure WattCycle LiFePO4 Batteries are prepared for winter, it's crucial to maintain their performance and safety. Here are some suggestions:

1) Storage Temperature: Avoid exposing batteries to extreme cold temperatures, as this can degrade or damage battery performance. Store batteries in a dry, cool (but not freezing) environment, ideally between 32°F (0°C) and 77°F (25°C).

2) Battery Charge Level: Before storage, charge batteries to around 50%-70% capacity. This helps reduce the natural discharge rate during storage and preserves battery health.

3）Avoid Over-Discharge: Prevent batteries from being excessively discharged in very low temperatures, as this can damage the battery. Complete discharge, especially in low-temperature environments, may lead to permanent battery damage.

4) Storage Location: Store batteries in a stable environment away from direct sunlight, moisture, or damp areas. The ideal storage location is dry, well-ventilated, and away from sources of heat and flammable materials.

5) Regular Inspection: Periodically check the status of batteries during winter to ensure they haven't been damaged or show any abnormalities. Pay special attention to any odors, leakage, deformation, or abnormal heating.

Overall, maintaining WattCycle LiFePO4 Batteries in appropriate temperature and charge states and conducting regular inspections are key to ensuring safe winter storage of batteries.

We recommend charging the WattCycle Energy battery to 50%. Then, disconnect the battery from the load by removing the negative wire from one battery.
Overall, the battery's capacity loss is less than 3.5% per month at 77°F (25°C). However, if stored in extreme environmental conditions, the capacity loss may increase.

1. Reputable site: WattCycle is a well-known website with established security measures and positive user feedback.
You can find effective information about wattCycle through google search.
At the same time, our company address and all valid contact information have been published on our website.
If you have any questions, please feel free to contact the WattCycle team. (service@wattcycle.com)

2. Verify secure connections: Look for "https://" and a padlock icon in the address bar before sharing any personal or payment details.

3. Use strong passwords: Create unique and robust passwords for your accounts to prevent unauthorized access.

4. Limit personal information: Be cautious about sharing unnecessary personal details, particularly via email or social media.

5. Secure payment methods: Whenever possible, use trusted payment options like credit cards or PayPal for added fraud protection.

6. Return policies and support: Before making a purchase, you can review the return policy and ensure reliable customer support is available first.

7. Secure your devices: Keep your devices updated with antivirus software and security patches to guard against malware and other online threats.

With these measures in place, you can enjoy your wonderful online shopping experience at WattCycle.

1. Credit/debit cards: Credit cards and debit cards from international brands such as Visa, Mastercard, American Express, Discover, etc.
2. PayPal: A safe and convenient online payment method widely used around the world.
3. Electronic wallet: Apple Pay to help your customers.

1. For unshipped orders: You can receive a refund for any reason before the item is shipped.
2. For orders in transit or already shipped: We do not support returns or refunds once the item is in transit or has been shipped. We reserve the right to handle returns and refunds on a case-by-case basis.
3. For undelivered orders:
- Lost orders: Please promptly provide your order number and relevant photographic evidence to our customer service team (service@wattcycle.com) to verify the situation. Your cooperation will help us expedite the investigation process and minimize losses for both parties. We appreciate your assistance and patience.
4. For delivered orders:
1) Wrong orders: If you receive an incorrect or surplus item, please provide your order number and relevant photographic evidence to our customer service team (service@wattcycle.com) as soon as possible for verification and further assistance. Please retain the original packaging for smooth return processing if necessary.
2) Orders with quality issues: Upon receiving your package, please inspect the contents promptly and retain the original packaging. If you discover any missing, rare, or damaged parts, please provide your order number and relevant photographs to our customer service team (service@wattcycle.com) without delay. Based on the circumstances, we will arrange for replacements, compensation, or return services accordingly.

In order to bring you a better shopping experience, we use the UPS Ground shipping channel. After placing your order, you can get the product you ordered within 5 working days.
At the same time, in order to reduce the trouble for both of us when returning goods, we recommend that you place an order after careful consideration. If you encounter difficulties ordering products, please feel free to contact us. We will give you the best purchasing plan as soon as possible.

Please click Return & Refund for more information!

No, we do not. We can ship to most countries and places. However, in the United States, we only provide free shipping within the contiguous states.

We maintain stable inventory both at sea and in overseas warehouses, alongside a consistent production capacity at our factory. Hence, there's no need to fret over shipping concerns.

Upon placing an order, our delivery system automatically generates your order. Our warehouse team diligently packs and ships orders in the sequence they are received.

Subsequently, our system sends a shipping confirmation email to your provided address
(please ensure it is accurate and frequently used).

This email contains your order details and a logistics tracking number, enabling you to monitor your package's journey at your convenience.

Typically, the entire process, from warehouse departure to delivery, spans 2-5 working days.
(However, occasional delays may occur during transit due to unforeseen circumstances. Should this happen, we'll promptly reach out to you. Your understanding is greatly appreciated.)

Our order confirmation mail is sent to your email box immediately after you placed your order.
It includes your recipient information and the quantity, price, discount, etc. of the ordered products.

The shipping confirmation mail is the shipping notice sent to you by the system after our warehouse staff sends your package out of the warehouse.
It includes your package logistics number. With this logistics number, you can check the logistics track of the package.

Please note: When you fill in the address information, please do not forget to fill in your right email address. Otherwise, you will not be able to receive your order confirmation mail and shipping confirmation mail.

If you have entered your email address correctly, but you still cannot receive the order confirmation mail or shipping confirmation mail, please check your email spam folder.
If you have confirmed that you cannot receive it, please contact our team as soon as possible. (service@wattcycle.com)

We do not recommend using a virtual phone.

Using your real phone number will make it easier for us to get in touch with you in an emergency or unexpected situation, and it will also make it easier for the courier to get in touch with you.

Note: We will not disclose your personal information. Your personal information will be protected by WattCycle.