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WattCycle 12V 314Ah Lithium LiFePO4 Leisure Battery UK
Cold Weather Protection for UK Campervans & Motorhomes：Designed for UK off-grid living, this 12V 314Ah LiFePO4 battery features built-in low-temperature protection, automatically stopping charging below 0°C to protect battery performance during winter camping and cold weather conditions.
200A High Output Lithium Battery for Inverters & Off-Grid Systems：Supports 200A continuous discharge, making it ideal as a high-power 12V lithium battery for motorhomes, caravans, solar power systems, and inverter-based off-grid setups.
12V 314Ah LiFePO4 Battery (4019Wh) for Campervan & Caravan Power Storage：High-capacity 4019Wh lithium leisure battery designed for UK campervans, caravans, and off-grid solar storage systems, offering stable and reliable deep cycle power in a compact form factor.
Built-in Smart BMS Protection System for Safe Lithium Battery Use：Integrated 200A Battery Management System (BMS) with full protection including overcharge, over-discharge, short circuit, temperature protection, and low-temperature cut-off for safe long-term use.
Compact Mini Design for Campervan Battery Compartments：Space-saving 12V lithium battery designed to fit tight motorhome and caravan battery compartments, with dimensions L384 × W194 × H248 mm for easy installation in UK leisure vehicles.
Long-Life Deep Cycle Lithium Battery with EV-Grade Cells：Built with high-quality EV-grade LiFePO4 cells, delivering up to 10,000–15,000 deep cycles for long-term energy storage in solar systems, RVs, and off-grid applications.
Expandable Lithium Battery System for Off-Grid Energy Storage：Supports up to 4P4S configuration, allowing scalable expansion for larger solar battery storage systems, home backup power, and off-grid energy setups.
Multi-Purpose Leisure Battery for Campervans, Caravans & Marine Use：Versatile lithium leisure battery suitable for campervans, caravans, boats, marine systems, solar power storage, and off-grid home backup applications across the UK.
Local UK warehouse, more details in
Shipping Policy
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: Warranty Policy
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Fast, Free Shipping
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Buy now, pay later
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Hassle-Free Warranty
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Lifetime Customer Support
Independently Tested by MarineHowTo (Rod “RC” Collins) — an ABYC Certified Marine Electrical Systems Specialist with extensive experience in marine energy management systems.
In real-world marine testing, RC found the WattCycle 314Ah BT Mini to be well suited to boating applications, highlighting its strong balance of safety, construction quality, and value for money. He also noted the battery’s solid internal design and build quality, particularly given its entry-level price point.
We appreciate RC’s independent testing and detailed feedback, which help provide customers with practical insights and transparent performance data.
Smarter Monitoring, Wherever Your Battery Is Installed
With Bluetooth 5.0 connectivity, the WattCycle app for iOS and Android allows you to monitor voltage, temperature, and state of charge in seconds.
Wireless monitoring is particularly useful for remote solar systems, off-grid setups, and under-seat or enclosed RV battery installations, making it easier to check battery status without accessing difficult-to-reach compartments.
Simpler Setup. Higher Capacity.
Enjoy 314Ah in a single battery, with less wiring, easier installation, and a more space-efficient design compared with multiple batteries in parallel.
Built Stronger. Runs Cooler.
Designed with reinforced construction, improved cooling, and upgraded copper wiring for greater durability and dependable performance under demanding use.
Scalable Energy Storage
Expand your system as energy demands grow, with support for up to 4S4P configurations (64.3kWh) — suitable for large solar installations and whole-home backup applications.
Technical Specifications
General
| Battery Technology | LiFePO4 |
| Dimensions | With Handles: L384 × W194 × H248 mm Without Handles: L340 × W194 × H248 mm |
| Weight | 27 kg |
| Terminals | M8 Bolts |
| Casing Material | ABS |
| Waterproof Rating | IP65 |
| Certifications | ECE R10, IEC, FCC, CE-EMC, CE-RoHS, CE-Battery, CE-RED, UN 38.3, PSE, METI, |
| Hazard Class | 9 |
| Warranty | 5＋2 Years |
Technical Data
| Nominal Voltage | 12.8V |
| Nominal / Usable Capacity | 314Ah |
| Energy | 4019Wh |
| Cell Balancing | Yes, passive balancing |
| Bluetooth | Bluetooth 5.0 |
| Monthly Self Discharge | ≤ 3% / month |
| Series & Parallel Configurations | Max. 4 in series / 4 in parallel |
Battery Management System (BMS)
| BMS Rating | 200A |
| Max Continuous Output Power | 2560W |
| Over-charge Detection Voltage | 14.4V ± 0.2V |
| Over-discharge Detection Voltage | 10V ± 0.2V |
| Standard Continuous Charge Current | 62.8A (0.2C) |
| Max Continuous Charge / Discharge Current | 200A (1C) |
| Over-current Charge Protection | 210A ± 10A |
| 1st Discharge Over-current | 210A ± 10A @ 10 ± 0.5s |
| 2nd Discharge Over-current | 250A ± 10A @ 1 ± 0.5s |
| BMS High Temperature Cut-off | Charge: 55°C ± 5°C Discharge: 65°C ± 5°C |
| BMS Low Temperature Cut-off | Charge: 0°C ± 5°C Discharge: -20°C ± 5°C |
| High Temperature Recovery | Charge: 50°C ± 5°C Discharge: 60°C ± 5°C |
| Low Temperature Recovery | Charge: 2°C ± 5°C Discharge: -15°C ± 5°C |
Temperature Range
| Charging Temperature | 0°C – 55°C |
| Discharging Temperature | -20°C – 60°C |
| Storage Temperature | 0°C – 45°C |
