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Local Pickup Only WattCycle 12V 628Ah Ultra Bluetooth LiFePO4 Battery (BMS 300A)
Compact Design: 480 × 362 × 242 mm | 69.85 kg
- Massive Capacity: 628Ah (12.8V) | ~8kWh energy storage in a single unit.
- Equivalent: 2-parallel 12V 314Ah
- High Energy Density: 3X weight energy density of lead-acid batteries, ideal for RVs and ships.
- Ultra-Long Cycle Life: 6,000+ cycles at 80% DoD—outperforming standard LiFePO4 batteries.
- High Power Output: Continuous 300A discharge (3,840W) for heavy-duty inverters and equipment.
- Smart Bluetooth Monitoring: Real-time voltage, SoC, temperature, and health via WattCycle app.
- Robust 300A BMS with 8X Protections: Over-current, short-circuit, and thermal safeguards.
- Temperature Protection: Charge: -5°C to 60°C | Discharge: -25°C to 75°C
- Scalable Design: Supports up to 4-series (51.2V) and 4-parallel (2,512Ah) = 128.61kWh usable energy.
- Military-Grade Build: UL94 V-0 fire-resistant ABS+PC casing with corrosion-resistant M8 terminals.
Free local shipping for all orders, except some areas need extra shipping cost.
Our batteries come with a 5-year warranty, which can be extended to 7 years total upon product registration. Accessories are covered by a 1-year warranty, and like-new (refurbished) batteries include a 1-year warranty.
For full terms, conditions, and claim details, please visit:
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Fast, Free Shipping
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30-Day Money-Back Guarantee
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Hassle-Free Warranty
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Lifetime Customer Support
In this review, the creator tests the Watt Cycle 12.8V 628Ah LiFePO4 battery, highlighting its extremely large capacity—over 8,000Wh of energy storage, which sets a new record for the 12V category. During testing, the battery actually delivered669Ah (106.5% of its rated capacity)at a 60A discharge rate. Internally, it uses solid aluminum busbars and multiple temperature sensors for safety monitoring. A high-current test reached about 257–258A discharge, where the BMS successfully protected the battery by shutting down when MOSFET temperatures approached 140°F, demonstrating effective thermal protection. The battery also passed low-temperature charging protection tests, stopping charge quickly when the sensor was cooled. Overall, the reviewer concludes that the battery uses high-quality cells, a capable BMS with Bluetooth monitoring, and excellent capacity.”
Tech Specs
| Dimensions | 18.9 X 14.25 X 9.53 inch | 480 X 362 X 242 mm |
| Weight | 139 lbs | 63 kg |
| Standard/Maximum Continuous Charging | 125.6A/300A |
| Maximum Continuous Discharging | 300A |
| Over-current Discharge Protection | 310A±10A |
| Over-current Charge Protection | 310A±10A |
| Primary Protection Current Value | 500A@20s |
| Secondary Protection Current Value | 1000A@5s |
| Short-Circuir Current Protection | Support |
| Release Condition | Cut Load |
| Charging High Temperature Protection | 140°F~158°F / 60°C~70°C |
| Discharge High Temperature Protection | 149°F~167°F / 65°C~75°C |
| High Temperature Protection Release Condition | Drop by 41°F~59°F / 5°C~15°C |
| Charging Low Temperature Protection | 23°F~41°F / -5°C~5°C |
| Discharge Low Temperature Protection | -13°F~5°F / -25°C~-15°C |
| Low Temperature Protection Release Condition | Rise by 41°F~59°F / 5°C~15°C |
| Rated Voltage | 12.8V |
| Standard Charging Voltage | 14.6V±0.2V |
| Shipping Charging Voltage | 12.8V~13.5V |
| Shipping Capacity | 50% |
| Cycle Life | 6000@80%DOD |
| Self Discharge Rate | <3%/Month |
| Series & Parallel Connections | 4 Parrallel(Max) 4 Series(Max) |
| Communications | Not Supported |
| Case Material | Metal |
| Storage Temperature | 32°F~140°F/0°C~60°C |
| Terminal Bolt Size | M8 |
