【🔥 72H Flash Sale, Final Price: €385,39】WattCycle 12V 100Ah Dual Purpose Marine Battery with Bluetooth and Self-heating
Estimated dispatch: July 14-18 | Delivery: July 21-31
- Cranking: 1200CCA to start the marine outboard motor
- Deep Cycle: 5000+ cycles @ 100% DoD to provide energy to electrical appliances on the boat/motorhome
- ✔ L354 x W176 x H187mm, 11kg
- ✔ 1200CCA (Cold Cranking Amps) @ 20s
- ✔ 5000+ Cycles @ 100% DoD (Depth of Discharge)
- ✔ 200A BMS, 2560W Output Power, 1280Wh Usable Energy
- ✔ IP67 Waterproof & Dustproof
- ✔ Self heating function automatically heats when temperature drops below 0°C until it reaches 5°C
- ✔ Forced start button allows emergency power-up when the battery fails to self-start
- ✔ Real-Time Monitoring via WattCycle App
- ✔ Support 4P4S Connection to 20.48kWh Energy
Services and Benefits
*Please see our Shipping Policy for more details.
*Please see our Warranty Policy for more details.
We're always there for you, feel free to contact us via Email (service@wattcycle.com) or WhatsApp.

- 1 Pack (Final: €385,39) - €409,99
- 2 Pack (€381,64/each) - €811,99
- 3 Pack (377.88/each) - €1.205,99
- 4 Pack (373,88/each) - €1.590,99
【🔥 72H Flash Sale, Final Price: €385,39】WattCycle 12V 100Ah Dual Purpose Marine Battery with Bluetooth and Self-heating
Thanks for choosing WattCycle. At WattCycle, we're committed to your satisfaction with our product(s). We guarantee that all WattCycle products are strictly tested by our quality inspectors before delivery.
We understand that there may be situations where you need to return or exchange your purchase. The following "Return & Refund Policy" applies to WattCycle products.
Order Cancellation
WattCycle accepts order cancellation before the product is shipped or produced. If the order is canceled, you will get a full refund via the original payment method within 10 working days (Due to delays in processing refunds from a bank).
WattCycle cannot cancel the order if the product has already shipped out.
Lost / Damaged Products Received
If the product was not delivered or lost, please immediately contact us. We will inquire about the situation and send you a statement. After you sign and send us the statement, we will re-arrange the shipment of your order.
If the product you received was damaged, or if you received an incorrect or incomplete product, please immediately contact us with proof of videos or pictures and product serial number (This number is on a sticker on the product, below the barcode.). After providing the above certificates and serial numbers, we will provide you with a solution based on the damaged or missing items.
30-Days Money-Back Guarantee
Within 30 days of purchase, if you are unsatisfied with the product and there are no quality issues, you are entitled to a refund upon returning the item in its complete, unused condition with original packaging intact. However, you will be responsible for covering the round-trip costs (including shipping fees and handling charges). Costs vary by country/region. Please contact us to confirm the specific costs..
If 30 days have passed since the purchase, a full refund cannot be offered.
Attention: For products that have been used (Unboxing), WattCycle reserves the right to refuse the return.
Return Shipping Cost
WattCycle Pays For Return Shipping
WattCycle will pay for the cost of return shipping if the reason for the return was the result of our error.
Examples of instances may include:
Item arrived defective and cannot be fixed with a replacement part.
We shipped out the wrong item.
We shipped it to the wrong address.
We shipped a duplicate order.
Item malfunctioned during the 30 day returns period. (The customer should install and operate the item properly per the product manual instruction.)
Attention
For items that arrive damaged or are defective, the customer MUST provide videos or photos to support the claim that the item arrived damaged or is malfunctioning. If a customer refuses to or fails to provide videos or photos of a claimed malfunctioning/damaged item, this return will be treated as “buyer’s remorse” and the customer is solely responsible for shipping it back. Once we have received the approved returned item, we will review its condition. If the item is found to be defective, we will issue a refund within 3 working days.
Customer Pays For Return Shipping
In the case of a return due to customer error, return shipping is the customer’s responsibility and shipping charges are paid by the customer. Fees vary by country, please contact us for specific fees.
Attention
Any order offered with special shipping charges is subject to a deduction from our actual outbound shipping costs.
After the 30-day returns period, customers may use the WattCycle Warranty Policy for repairs if the item is faulty or malfunctioning. Please refer to the WattCycle Warranty Policy for details.
Return Item & Address
After confirming with our customer service team that a return is possible, we will provide you with a return solution based on your order's fulfillment warehouse.
If your order was shipped from a German warehouse, we are unable to provide a return label. You will need to contact our customer service team to obtain the return address and arrange the return yourself.
If your order was originally shipped from a Polish warehouse, we will provide you with a return label. You simply need to take the product with the return label attached to a courier station to ship it back.
Refund
For non-quality-related issues and unopened packages, you will be responsible for covering the round-trip costs (including shipping fees and handling charges). Costs vary by country/region.
For quality-related issues reported more than 30 days after the purchase date, WattCycle will provide a partial refund based on the product's usage condition.
Refund Timeline: Once the product is returned to the WattCycle warehouse, WattCycle will process the refund within 7 business days and send you a refund confirmation notification.
Refund Method: The refund will be issued to your original payment method and account.
Attention
If you do not receive the refund within 10 business days, please contact us, and we will assist you in checking the refund status.
Disclaimer
WattCycle does not offer refunds for the following cases:
Discounted or promotional items.
WattCycle products purchased through other entities (e.g., distributors or retail partners).
Returns from a country/region different from the original shipping address of the order. If the return address differs from the original shipping location, resulting in shipping costs exceeding the initial fees, the user will be responsible for covering the additional shipping fees.
Products showing signs of wear, use, or alterations from their original condition.
Products damaged or lost during the return process.
Changes to This Policy
We reserve the right to modify this Return & Refund Policy at any time. We will post any changes to this policy on our website. We appreciate your support! If you have any questions about our shipping policy, please feel free to contact us.
FREQUENTLY BOUGHT TOGETHER
Trustworthy Dual Purpose Marine Battery
WattCycle 12V 100Ah dual purpose marine battery can not only start the marine outboard motor but also provide sufficient energy to power the electrical appliances in the motorhome. Whether you are fishing on the water or enjoying the scenery during your camping journey, it's always a reliable energy source.
Note: For use in the motorhome, it can only provide energy as an energy-storing battery. Please do not use it to start the vehicles.
Smart Upgrade, Redefine Marine Experience
WattCycle 12V 100Ah Dual Purpose Marine battery is made of high-quality EV Grade A+ cells, which ensure up to 15000 cycles @ 60% DoD. IP67 waterproof allows you to use the battery for a long time in a marine environment without the damage to the battery.
Compared to other batteries equipped with 100 BMS, the 200A BMS of the 12V 100Ah dual purpose battery makes the Max. continuous discharge current of the battery 200A, meeting your higher power needs.
Marine Battery's Plus Version
Compared to WattCycle 12V 100Ah Trolling Motor battery, this 12V 100Ah Dual Purpose Marine Battery has more 3 advanced functions: self-heating, force start, and engine starter.
Reliable 1200CCA Cold Cranking Power Energizes Your Boat
The BMS (Battery Management System) of a 12V 100Ah marine cranking battery can support a continuous constant discharging current of 200 amperes and can withstand an instantaneous current of 1200 amperes within 3 seconds. When the battery voltage exceeds approximately 14 volts, the BMS activates a passive balancing process at the end of each charge cycle.
Keep Powering Your Trip in Cold Weather
For areas in cold temperatures, the self-heating function of this battery will help a lot. It automatically heats itself when the temperature drops below 0°C. The self-heating process continues until the battery reaches 5°C, ensuring optimal performance in low temperatures. It's the wise energy choice if you would like to ice fish or snow camp.


Forced Start Button, Double Guarantee of Energy & Safety
When the remaining capacity of the LiFePO4 battery drops to 20%, the built-in protection mechanism will be triggered to prevent over-discharge to extend the battery life and ensure safety. The forced start button can temporarily bypass the protection mechanism, release the remaining capacity, and provide emergency power support for the device.
The physical forced start button is not needed for mobile phone operation, you can start the backup power even if your mobile phone is out of power.
Monitoring WattCycle Bluetooth Battery via WattCycle App
Connecting the WattCycle Bluetooth battery with your phone takes just 3 easy steps: Download the WattCycle App from Apple App Store or Google Play, Search for your Bluetooth battery, and Select the battery on the App. On the WattCycle App, you can check the battery's SoC, voltage, current, power, and the working temperatures.
Four Charging Methods, No Fear of Energy Shortage
There are four charging methods to charge the 12V 100Ah marine cranking battery: 14,6V 20A LiFePO4 battery charger, generator with 14,6V 20A AC-DC charger, solar panel with MPPT, and alternator with charger.
Multiple charging methods allow you to use the solar panel with MPPT to charge while sailing, and use a 14,6V 20A LiFePO4 charger on shore to charge. No matter where you are, there is a charging method suitable for you to escort your journey.
Meet Your Various Needs on The Water
WattCycle 12V 100Ah dual purpose marine battery with dual mode of starting the marine outboard motor and storage the energy can satisfy your different needs on the water. Wether you need to start an engine of the boat, or provide energy to fish finder, this two in one battery is a wise choice for you.
PRODUCT DESCRIPTION
Small Battery but Massive Power: With the small size of L354 x W176 x H187 mm, and 11kg light weight, the 12V 100Ah dual purpose battery occupies little space but provides 1280Wh energy and an instantaneous current of 1200A within 3 seconds.
Two in One Battery with Dual Purpose Mode: The dual purpose mode lets you use it to start an engine or store energy, making it a trustworthy choice not only in marine but also in motorhomes and off-grid systems.
Self-heating Suitable for Cold Areas: When the temperature drops below 0℃, the self-heating function will heat the battery automatically to 5℃ and no fear of power outages when the temperature drops below 0℃, letting you have enough usable energy to enjoy snow camping.
1200 Cold Cranking Amps Fit Marine Needs: Providing 1200CCA@20S and IP67 waterproof, the WattCycle 12V 100Ah dual purpose starter battery is perfectly suitable to start an engine in marine environments, ideal companion when you sail on the sea.
Bluetooth 5.0 Connecting: Built-in Bluetooth allows you to check and control the battery conveniently. On the WattCycle App, you can control battery charge/discharge, check battery's SOC, voltage, current, power, single cell voltage and temperature and so on.
Reliable Emergency Energy Backup: When the remaining capacity of the LiFePO4 battery drops to 20%, the built-in protection mechanism will be triggered to prevent over-discharge. The forced start button can temporarily bypass the protection mechanism, release the remaining capacity and provide emergency power support for the device.