Specification | Details |
Brand & Model | SK E556 3.7V 55.6Ah Pouch NCM Lithium Polymer |
| Capacity | Min. 55.6Ah; Real 57.6Ah (@1/3C) |
Max Continuous Discharge | 6C (333.6A) |
Nominal Energy | 202.9Wh (Min.); 209.3Wh (Real) |
Energy Density | 619Wh/l (Volumetric); 280Wh/kg (Gravimetric) |
Dimensions | 9.5(T) × 354(W) × 101(H) mm (10×100×355mm nominal) |
Weight | ~0.75kg |
| Cycle Life | ≥1,500 cycles (2/3C, 41℃, SOC 0-97%) |
Internal Resistance | ~0.6mΩ |
Product Overview
The SK E556 is a premium pouch-type NCM lithium-ion battery cell, purpose-built for high-power, long-duration applications. With a nominal voltage of 3.65V (3.7V nominal), minimum capacity of 55.6Ah (real capacity up to 57.6Ah), and a 6C continuous discharge capability, it delivers the sustained power output needed for high-demand scenarios. Its ultra-thin, lightweight design (9.5mm×354mm×101mm, 0.75kg) allows for flexible integration, while SK's strict automotive-grade quality control ensures consistent performance across every unit. Trusted by our customers for paragliders, it also powers electric vehicles, portable outdoor stations, and street light storage systems with ease.
Core Advantages
Genuine SK Innovation Quality: 100% authentic E556 cells, manufactured to SK's automotive-grade standards, with full compliance to the official datasheet.
6C High Continuous Discharge Rate: Supports 6C continuous discharge (up to 1,200W power at 25℃), delivering the raw power needed for paragliders, high-performance EVs, and power-hungry devices.
Class-Leading Energy Density: 619Wh/l volumetric and 280Wh/kg gravimetric energy density, maximizing runtime without adding unnecessary bulk.
Ultra-Low Internal Resistance: ~0.6mΩ measured IR, minimizing heat buildup and maximizing efficiency during high-rate use.
Proven Durability: ≥1,500 cycles at 41℃ (2/3C, SOC 0-97%) with excellent capacity retention, plus robust high/low temperature storage performance.
Versatile Application: Field-proven in paragliders, and ideal for electric vehicles, outdoor power stations, street light energy storage, and custom battery packs.
Recommended Applications
Paragliders (Proven Use Case) – Field-tested with our customers, the 6C discharge rate and lightweight design deliver reliable, sustained power for paraglider systems.
Electric Vehicles (EVs) – Ideal for light EVs, e-scooters, and custom EV builds, offering high power and long cycle life.
Outdoor Power Stations – High energy density ensures long runtime for portable power stations, perfect for camping, off-grid use, and emergencies.
Street Light Energy Storage – Durable cycle life and wide temperature adaptability make it perfect for outdoor street light and solar storage systems.
Custom Battery Packs – Flexible pouch form factor allows easy assembly into custom packs for industrial and consumer applications.
Why Source SK E556 From Joyvolte Energy ?
100% Genuine SK Cells: Authorized supply, with full access to official datasheets and test reports.
Pre-Shipment Testing: Every cell undergoes IR, capacity, and discharge testing to ensure zero defects.
Competitive Bulk Pricing: Flexible MOQ to fit small-scale projects and large manufacturing orders.
Safe & Fast Shipping: Anti-static packaging for pouch cells, with timely delivery to global regions.
24/7 Technical Support: Prompt quotes, stock updates, and battery pack design consultation within 24 hours.
Ready to power your paraglider, EV, or outdoor project with the SK E556 high-rate pouch cell?
Contact us today for custom quotes, bulk pricing, and real-time stock availability. We respond to all inquiries within 24 hours!
