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12.8V 20Ah LiFePO4 Battery Pack (40135 4S1P)
$32.00
High-capacity 12.8V 20Ah LiFePO4 battery pack built with 40135 cylindrical cells in a 4S1P configuration. Delivers approximately 256Wh of stable, durable power for demanding applications. CE, RoHS, IEC 62133-2 and UN38.3 certified for safe global shipping and use.
Full Product Description
HNF Battery 12.8V 20Ah LiFePO4 Battery Pack
This 12.8V lithium iron phosphate (LiFePO4) battery pack is built with 40135 cylindrical cells arranged in a 4S1P configuration, delivering a rated capacity of 20000mAh (20Ah) and a rated energy of approximately 256Wh. The larger-format 40135 cell provides high single-cell capacity while keeping the pack in a compact 4S1P layout, making it a reliable, long-cycle-life alternative to lead-acid batteries in 12V-class systems that demand higher power density.
Key Features:
- Stable 12.8V Nominal Voltage – Direct drop-in replacement for many 12V lead-acid applications
- 20Ah High Capacity – Extended runtime in a compact single-parallel-string design
- LiFePO4 Chemistry – Superior thermal stability, safety, and long cycle life compared to NMC/ternary lithium
- 40135 Cylindrical Cells (4S1P) – Large-format cells deliver high capacity with fewer parallel connections, improving reliability and reducing internal resistance
- Charging Limit Voltage: 14.6V – Compatible with standard LiFePO4 chargers
- Multi-Certified for Safety & Compliance – CE, RoHS, IEC 62133-2, and UN38.3 tested, with lot-level traceability
- Color-Coded Leads – Red (+) / Black (–) for easy, error-free installation
Applications:
Portable power stations, solar lighting and energy storage, security and surveillance systems, mobile equipment, backup power systems, and other 12V-class devices requiring high capacity in a compact form factor.
Certifications: CE, RoHS, IEC 62133-2, UN38.3, CCC
Product Specifications:
| Parameter | Value |
|---|---|
| Product Model | 40135-4S1P |
| Nominal Voltage | 12.8V |
| Rated Capacity | 20000mAh (20Ah) |
| Rated Energy | ~256Wh |
| Charging Limit Voltage | 14.6V |
| Cell Type | 40135 Cylindrical LiFePO4 |
| Configuration | 4S1P |
| Lead Wires | Red (+) / Black (–) |
| Applicable Standard | GB31241-2022 |
| Certification | CE, RoHS, IEC 62133-2, UN38.3, CCC |
Why Choose HNF Battery
HNF Battery is a China-based lithium battery manufacturer dedicated to providing safe, reliable, and consistent power solutions for international B2B buyers. Every battery pack undergoes strict quality control before shipment, with lot-level traceability and change-control notifications to ensure consistency across production batches. Our LiFePO4 packs are built to GB31241-2022 standards and certified to CE, RoHS, IEC 62133-2, and UN38.3, giving customers confidence in both safety and international shipping compliance.
Frequently Asked Questions
Can this battery pack be customized for different voltage or capacity?
Yes, this 40135 4S1P battery pack can be customized in voltage, capacity, connector type, wire length, and BMS parameters to match your specific application. Contact our sales team with your requirements for a tailored quote.
What makes the 40135 cell different from smaller cells like the 32700?
The 40135 is a larger-format cylindrical cell with higher single-cell capacity, allowing this pack to reach 20Ah using only 4 cells in series (4S1P) rather than requiring multiple cells in parallel. This can improve reliability and reduce internal resistance compared to packs built from smaller, multi-parallel cell strings.
Is this battery safe for international shipping?
Yes, this pack is UN38.3 tested, which covers the required safety testing for air, sea, and land transport of lithium batteries.
What is the expected cycle life of this LiFePO4 pack?
LiFePO4 chemistry is known for long cycle life and thermal stability, making it well-suited for applications requiring frequent charge/discharge cycles.
Do you offer bulk/wholesale pricing?
Yes, bulk pricing is available for wholesale and OEM orders. Reach out to our team for a quote based on your order volume.
What charger should I use with this battery?
Use a charger compatible with the 14.6V charging limit voltage specified for this pack to ensure safe and efficient charging.
Looking for a Tailored Battery Pack?
This 40135 4S1P configuration is one example of what HNF Battery can build. As a factory-direct manufacturer, we work with OEM and industrial buyers to design LiFePO4 battery packs to exact voltage, capacity, connector, and BMS requirements. Send us your specifications for a custom quote.
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