3500mAh 18650 Lithium Ion Battery with 8A Continuous Discharge and High Energy Density

This battery solution is built around the Samsung SDI INR18650-35E lithium-ion cell. All system design parameters strictly reference Samsung's official cell specification to ensure predictable performance, reliability, and engineering consistency.

The INR18650-35E, developed by Samsung SDI, is a widely recognized energy-type 18650 lithium-ion cell known for its high energy density, stable voltage platform, and publicly verifiable performance data.

Rather than supplying bare cells, we utilize this mature and well-documented cell as a core energy unit, delivering application-ready battery pack solutions through professional cell screening, electrical and mechanical design, BMS integration, and compliance support.

Our role is to transform a proven cell platform into a reliable, manufacturable battery system aligned with your real-world operating requirements.

• Cell Screening & Matching - Incoming inspection and grading conducted strictly in accordance with the Samsung SDI INR18650-35E specification, covering capacity, internal resistance, voltage consistency, and appearance.
• Battery Pack Design & Integration - Complete system engineering including electrical architecture, mechanical structure, thermal considerations, and protection strategy.
• Testing & Compliance Support - Support for sample aging, functional validation, and certification processes such as UN38.3, IEC 62133, CE, and UL (project-dependent).
• Long-Term Technical Collaboration - Engineering support from early feasibility assessment through pilot build and mass production.

• Typical capacity: 3500mAh
• Gravimetric energy density: ≥ 245 Wh/kg

System-level impact: Fewer cells required for the same energy target, enabling smaller pack size, reduced weight, and simplified structure, which directly lowers BOM and integration cost.

• Continuous discharge current: 8A
• Capacity retention: ~97% at 1C, ~95% at 2C

Optimized for stable, sustained loads, the 35E is ideal where runtime and efficiency matter more than short-term peak power.

• Discharge range: -10 °C to +60°C
• Approx. 40% usable capacity at -10°C

With proper pack-level thermal design, systems based on this cell deliver predictable output in demanding environments.

• ≥500 cycles with ≥70% remaining capacity
• ≥90% capacity recovery after high-temperature storage

This supports longer product life, extended warranty strategies, and reduced replacement frequency.

All data referenced from Samsung SDI official INR18650-35E specification - engineering reference

• Energy Storage Systems (ESS) - High energy density improves space utilization; long cycle life protects ROI
• Backup Power & UPS - Stable voltage platform ensures predictable backup duration
• Medical & Diagnostic Equipment - Low self-discharge and reliability support continuous operation
• Industrial Electronics & Monitoring Systems - Consistent performance under sustained load conditions

• High-power electric tools
• High-burst UAV or racing platforms
• Applications requiring continuous discharge above 10A

• Common system voltages: 12V / 24V / 36V / 48V
• Series-parallel optimization
• Structural and thermal layout design

• Protection: OVP / UVP / OCP / OTP
• Passive or active balancing strategies
• Communication: UART / CAN (project-dependent)

• UN38.3 transport compliance
• IEC 62133 safety alignment
• CE / UL project support

Four-Stage Quality Gate

• Incoming Cell Reception
• Performance Testing (Capacity / IR / Voltage)
• Consistency Matching & Grouping
• Approval for Pack Integration

This process ensures every cell integrated into your system meets defined engineering criteria before production.