WattCycle 12V 50Ah LiFePO4 Battery

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Compact】7.68 x 5.12 x 6.70 inches
Safe】Low-temperature cut-off protection
Premium】EV grade A+ LiFePO4 cells
Durable】4,000-20,000 deep discharge cycles
Reliable】Built-in 50A BMS | 640W | 640Wh
Scable】Expandable max 4S4P, up to 10.24kWh

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WattCycle 12V 50Ah LiFePO4 Battery




  • 12V 50Ah LiFePO4 Battery: Compared with traditional lead-acid batteries, WattCycle LiFePO4 battery is made of the latest lithium-ion material, the battery doesn't contain any heavy metal elements, it's safer and more environmentally friendly. The 12v battery has the advantages of high energy density, long cycle life, good safety performance and no harmful hydrogen gas.
  • A+ Grade Cells and Deep Cycle Times: WattCycle RV battery are made of advanced A+ grade cells with SDS/UN38.3/FCC/CE/ROHS certificates, which increase the range time by 20% compared to lead-acid battery, with more stable performance and higher efficiency. The service life can reach 5-10 years, and the cycle times can reach 8000-20000 times. It comes with built-in 8A BMS to ensure the safety of LiFePO4 battery use.
  • Support for Series and Parallel Use: WattCycle LiFePO4 12v battery is scalable for both parallel and series connection to meet the needs of larger capacity and voltage. Both series and parallel connection are recommended to use the same brand of battery for connection, the batteries must have the same voltage and capacity and be purchased within 6 months. A maximum of four batteries are supported for connection for greater capacity and higher voltage.
  • Applicable to Many Scenarios: WattCycle 12v battery can be used in RV/outdoor camping, automobiles, boats, golf carts, trolling motors, wheelchairs, ride-on toys, computer back-up power, emergency lighting equipment, alarms, home energy storage, solar and wind energy storage, etc. When using it on ride-on toys, please choose a larger capacitor to avoid power failure caused by load protection. Please choose the appropriate battery capacity according to your usage scenario.
  • Quality Assurance and After-sales Service: WattCycle batteries offer 5-10 years of float and standby use with no maintenance required. With a single installation, you can have your system or application up and running quickly. All WattCycle lithium batteries come with after-sales quality assurance. For any questions or quality issues, please contact our support team. We are committed to providing you with satisfactory after-sales service.

Tech Specs

Dimensions 19.5″ (L) x 13.0″ (W) x17.0"(H) 
Weight 11.46lbs(5.2kg)
Waterproof Rating IP65
Warranty 5 years
Housing Material ABS (Flame Retardant Plastic)
Terminal M8 bolts

Cell Grade A+ LiFePO4 Cells
Nominal Voltage 12.8V
Nominal/Usable Capability 50Ah
Energy 640Wh
Cycle Life 4,000 cycles at 100% DOD, 15,000 cycles at 60% DOD, 20,000 cycles at 40% DOD
Max Depth of Discharge (DOD) 100%
Max. Expansion (Parallel & Series) 4S4P
Certifications SDS/UN38.3/FCC/CE/ROHS/UL
Internal Resistance ≤40mΩ

Max. Continuous Output Power 640W
Max. Continuous Charge Current 50A
Max. Continuous Discharge Current 50A
Max. Discharge Current 5 Seconds 100A±50A (3-5 Seconds)

Charge Voltage 14.6V ± 0.2V
Charge Method CC/CV
Recommend Charge Current 10A (0.2C)
Charge Temperature 0℃ to 50℃ / 32℉ to 131℉
Discharge Temperature: -20℃ to 55℃ / -4℉ to 131℉
Storage Temperature 0℃ to 55℃ / 32℉ to 131℉
Low-Temperature Protection Yes (32℉/0℃)
Low-Temperature Charging Protection Auto Recovery Yes (41℉/5℃)



Frequently asked questions

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Q1: Does it support the shortcurcuit protection?


Q2:Does it support communication cability?


Q3: What to do when receive the battery?

You need to fully charge the battery.
Note: If you want to connect the batteries in series or parallel, please fully charge the batteries.

Q4: Where can l install it?

The battery should be installed in a clean, cool, and dry location, away from water, oil, and dirt.

Q5: What tools will I use for the installation?

1) Proper insulation protection equipment
2) Multimeter, battery cables
3) Battery charger/charge controller

Q6: What preparations, tools, and precautions are necessary for installation?

Before Installation:
1) Check for visible damage to the battery, including cracks, dents, deformation, and other visible abnormalities.
2) Ensure that the top of the battery and the terminal connections are clean, free of dirt and corrosion, and dry. If any issues are detected with the battery, please contact us for assistance.
3) Do not short-circuit the battery terminals, as doing so may cause a current surge and result in irreversible damage to the system and battery.
4) Before connecting, confirm the polarity to avoid damaging the battery due to polarity reversal.
5) Use a circuit breaker, fuse, or an appropriate-sized circuit breaker designated by a qualified electrician, licensed installer, or regulatory authority to protect all electrical equipment.

Installation Steps:
Step 1: Fully charge the batteries separately.
Step 2: Test the voltage after 15 minutes of standing, which should be greater than 13V.
Step 3: Connect your batteries in series and/or parallel.

Q7: Can I connect the battery with other batteries from other brands?

No, you cannot.
When connecting batteries in series and parallel, please follow the following rules.

1) Same brand (Due to different BMS settings, do not connect lithium batteries of other brands)
2) Same battery type (LiFePO4) (Do not connect batteries of other types, such as lithium-ion, lead-acid, or other batteries)
3) Same voltage (recommended for fully charged batteries) (12.8V)
4) Same capacity (50Ah)
5) The purchase cycle of the two batteries should not exceed three months.

Q8: What precautions should be taken when using lithium batteries?

Use a LiFePO4 battery charger with a maximum charging voltage/current of 14.6±0.2V/50A.
The battery is classified as a flammable and explosive item. Please use it with caution.

Avoid mechanical impact/No short-circuit/No crush/No disassemble/No incinerate/No heat above 150°F/No harge above 15V/No immerse the battery in water or fire/No use batteries from other brands or different types of batteries in series/parallel (due to different BMS settings)/No reverse the battery and charger

Use a torque wrench to tighten bolts not your hands
Keep the battery away from fire, hazardous substances, or materials.

Q9: What should be considered when charging?

Check if the AC-DC battery charger you are using has a specific lithium charging setting and ensure the following charging requirements are met.
Many battery chargers are designed for lead-acid batteries and may not have suitable settings for lithium batteries.

Charging Tips:
1) Use a 14.6V LiFePO4 battery charger.
2) Recommended charging voltage: 14.4 ~ 14.8V
3) Recommended charging current:
20A - The battery will be fully charged to 100% capacity in approximately 2.5 hours.
50A - The battery will be fully charged to 100% capacity in approximately 1 hour.

Q10: How should batteries be stored?

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. However, if stored in extreme environmental conditions, the capacity loss may increase.

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