Discover Hypercell’s INR18650 wide-temperature Li-ion cells (-40°C to 85°C). Featuring up to 70% retention at -40°C, full MES traceability, multi-country certifications (UL1642, CB, KC, PSE), and custom OEM battery pack solutions.

Extreme Climate Challenges in Next-Gen Industrial Power

Standard lithium-ion batteries suffer severe failure in extreme outdoor or industrial environments. At -20°C and below, common liquid electrolytes freeze, leading to spiked internal resistance and drastic voltage drops. Conversely, continuous operation or storage at temperatures above 60°C accelerates internal side reactions, capacity fade, and severe thermal hazards.

For mission-critical applications—ranging from arctic monitoring stations and maritime telemetry to aerospace devices—power supply failure is not an option.

To resolve these environmental and reliability bottlenecks, Hypercell offers its specialized INR18650 Wide-Temperature Cell Series, combining extreme temperature performance with Full-Process MES (Manufacturing Execution System) Quality Traceability for global OEM/ODM brand partners.

Proven Low & High-Temperature Performance

Engineered with low-impedance electrode architectures and modified electrolyte formulations, Hypercell’s wide-temperature INR18650 cells retain exceptionally high energy output across severe thermal swings.

Key Thermal & Electrical Capabilities:
Extended Voltage Range: 2.00V ~ 4.20V (Maximizing energy extraction in low-temp environments)
Extreme Discharge Range: -40°C to 85°C
Extreme Charging Range: -20°C to 60°C
Discharge Capacity: Retains up to 60% – 70% of initial capacity (at 0.2C)
Storage Stability: Retains >85% – 90% capacity retention after 1,000 hours of high-temp aging
Long Cycle Life: >70% initial capacity after 500 cycles (0.3C charge/discharge)

INR18650 Wide-Temperature Model Matrix

High-Reliability Deployment Scenarios

Hypercell INR18650 wide-temperature solutions cater to ultra-demanding industrial, medical, and consumer electronics applications:

1. Aerospace & Space Operations: Satellite communication base stations and high-altitude devices operating under extreme thermal fluctuations.
2. Marine & Extreme Off-Shore: Marine drilling platforms, maritime signal systems, and deep-sea exploration tools.
3. Polar Expeditions & Extreme Climate Monitoring: Arctic meteorological nodes, outdoor telemetry, and high-altitude environmental sensors.
4. Special Industrial & Field Medical Supplies: Ruggedized vehicle tracking, smart grid inspection gear, and portable rescue devices.

End-to-End MES Traceability & Global Certification

For B2B brand owners, battery safety and lot consistency are critical purchasing criteria. Hypercell enforces stringent quality management backed by global certification and digital transparency:

Full-Process MES Tracking: Every cell is QR/Barcode serialized. From raw material inspection and automated IR/capacity matching to BMS welding and final End-of-Line (EOL) testing, 100% of manufacturing parameters are logged and permanently traceable.

Global Compliance Ready: Fully certified with UL1642, CB, KC, PSE, UN38.3, and DG (Dangerous Goods) compliance, facilitating smooth global shipment and market clearance for our OEM partners.
Supply Chain Continuity: Low supply continuity risk with standard export packing (200 PCS/Carton) and flexible OEM pack assembly.

Tailored OEM/ODM Custom Battery Pack Engineering

Beyond supplying standard cells, Hypercell acts as an end-to-end battery engineering partner:

Custom Wide-Temp BMS: Specialized protection boards with dynamic low-temp charging protection, high-temp cutoff, and accurate SOC algorithms.
Rugged Mechanical Designs: IP67/IP68 waterproof casings, anti-vibration structures, and thermal insulation tailored for severe operating conditions.

Partner with Hypercell

Looking for reliable wide-temperature lithium batteries backed by transparent manufacturing and international compliance? Contact our engineering team today to request testing samples or discuss custom battery pack design.

Developed based on real-world application requirements, this 3.7V 4000mAh power bank is engineered to provide a balanced charging solution for small portable electronic devices such as headphones and watches. From initial design to final validation, this new arrival ——-HPC B1 represents a milestone in our rigorous R&D process, balancing Capacity with weight and size.ns.

Validated Development Process

The core competitiveness of this product stems from our meticulous control over the development process and rigorous screening of cell performance. From project initiation to mass production, every stage is driven by the core requirements of “stability, durability, and compatibility.” In particular, we have devoted significant R&D resources to cell performance testing and solution optimization to ensure that our products meet the quality standards required for mass production.

Core Cell Testing:

• Cycle Life Test:

  Conducted using a 1.0 C5A discharge standard under strictly controlled test conditions (Charging: 0.5 C5A constant-current charging to 4.2 V, followed by constant-voltage charging at 0.02 C5A; Discharge: 1.0 C5A discharge to 2.5V; 30-minute interval between charge and discharge cycles; ambient temperature 20±5°C). After 500 complete charge-discharge cycles, the cell capacity remains at over 80% of its initial capacity, meeting durability requirements.

• Charge/Discharge Current Control:

  During R&D, we precisely tailored the design to meet the diverse needs of B2B scenarios by establishing tiered charging current standards. In low-temperature environments (0°C–15°C), the maximum charging current is set to 0.2C (5A) to prevent cell damage caused by charging at low temperatures. In standard environments (15°C–45°C), the maximum charging current reaches 0.5C (5A), balancing charging efficiency with cell safety; The maximum discharge current is stabilized at 1.0C (5A), ensuring a steady output that meets the power requirements of 3.7V small digital devices such as Bluetooth earbuds, smart wristbands, and small office equipment, thereby preventing device damage caused by unstable current.

• End-to-End R&D Testing:

  During the development of this product, we conducted multiple rounds of testing and optimization focused on cell performance, circuit stability, and structural compatibility. We placed particular emphasis on verifying core metrics such as cell cycle life and charge/discharge stability to ensure consistent performance across every batch of mass-produced products. This provides quality assurance for bulk purchases by enterprises and reduces post-purchase service risks.

Performance & Reliability

Based on standardized R&D processes and rigorous cell testing, it balances practicality with portability：

• Standardized mass production and stable supply:

  With standardized 3.7V 4000mAh specifications and production processes established during the R&D phase, we achieve high mass production efficiency and ensure a stable supply.

• Stable performance and strong adaptability:

  The core battery cells have been validated through 500-cycle lifespan testing, demonstrating outstanding durability; graded control of charge and discharge currents ensures compatibility with usage requirements in various environments.

• Customization support to drive brand enhancement:

  We support customization of corporate logos, exterior color schemes, and packaging; we provide sample shipping services and formal cooperation agreements to guarantee delivery schedules and product quality.

Contact us to discuss your power bank project or customized battery requirements.