SunPower INR21700-5500 5500mAh 30A High Drain Multi-Tab 21700 Cylindrical Lithium-ion Battery Cell for Power Tools & LEVs

The SunPower INR21700-5500 is an exceptional 5500mAh high-density 21700 rechargeable lithium-ion cell manufactured by Jiangsu SunPower Co., Ltd. Powered by advanced Multi-Tab structure internal technology, this cell delivers a lower AC internal impedance (≤15.0 mΩ) and vastly reduced thermal buildup during continuous high-rate operation.

With a high nominal capacity of 5500mAh, the cell offers up to 16.5A continuous discharge without thermal monitoring, and up to 30A continuous discharge when paired with a 75°C temperature cut-off, alongside a massive 70A short pulse rating.

Ideal for applications requiring the perfect balance of ultra-long run time and high power delivery, the SunPower INR21700-5500 is a direct alternative to full-tab cells for high-demand equipment. As an official supplier, we provide factory-direct wholesale supply and special distributor pricing for worldwide battery pack assemblers.

• High-Efficiency Multi-Tab Architecture: The multi-tab construction significantly shortens current pathways inside the roll, reducing internal heating during discharge while maintaining excellent impedance control (≤15.0 mΩ).
• Ultra-High Energy Density & Power Balance: Combining a full 5500mAh capacity with up to 30A continuous output (with thermal management), allowing equipment to run both longer and under heavier loads.
• Fast-Charging Capabilities: Supports high charge currents up to 10A, drastically cutting down recharge times for commercial fleet operations.
• Superior Low-Temperature Performance: Maintains ≥70% capacity retention under extreme sub-zero discharge environments down to -20°C.
• Solid Cycle Life Expectancy:
  • Retains ≥ 80% capacity after 500 cycles under standard charge/discharge (2.75A / 5.5A)
  • Retains ≥ 80% capacity after 300 cycles under heavy charge/discharge (5.5A / 11A)
• Strict Pack Consistency: Rigorous internal quality control ensures voltage differences ≤10mV, internal resistance differences ≤2 mΩ, and minimal capacity variance across batches for safer, easier battery pack building.
• Comprehensive Safety Certifications: Fully safety-tested against overcharge (3C to 10V), short circuit (80 mΩ load), hydraulic crush (13kN), 130°C thermal shock, drop testing, and altitude simulation.

• High-End Cordless Power Tools: Heavy-duty circular saws, rotary hammer drills, lawn mowers, and high-torque angle grinders
• Commercial Smart Cleaners: High-suction cordless vacuum cleaners, robotic floor scrubbers, and industrial sweepers
• Light Electric Mobility (LEVs): High-range e-bikes, cargo e-trikes, electric scooters, and electric skateboards
• Drones & Robotics: Multirotor UAVs, delivery robots, and AGVs requiring sustained power output with max capacity
• Portable Energy Storage (ESS): High-wattage outdoor power stations and backup battery banks

• Voltage & Charging Limits: Charge exclusively with a dedicated Li-ion charger set to 4.20V ± 0.05V cut-off. Never exceed the 10A maximum charge current or connect cells directly to AC mains.
• Operating Range: Maintain operating voltage strictly between 2.50V and 4.25V. Do not discharge below 2.50V or attempt to recharge severely over-discharged cells.
• BMS Requirement: Cells must be integrated with a certified BMS featuring thermal, over-charge, over-discharge, and short-circuit protection.
• No Direct Soldering: Never apply a soldering iron directly to the cell terminals. Use proper spot-welding equipment to prevent thermal damage.
• Handling Precautions: Do not short-circuit terminals with conductive objects. Never crush, puncture, disassemble, or expose cells to water, high temperatures, or open flames.
• Cell Mixing: Do not mix new and used cells, or combine SunPower cells with other brands or chemistries.
• Storage Protocol: For storage over 3 months, store at 3.50V-3.70V (~40% SOC) between -20°C and 25°C. Refresh charge every 3 months to 3.65V using 0.5C current.

As a reliable, specialized global battery supplier, we supply authentic, brand-new SunPower INR21700-5500 cells directly sourced from original production batches.

• Factory-direct wholesale discounts for bulk orders
• Complete manufacturer datasheets, test reports, and MSDS/UN38.3 transport documents provided
• Professional advice for customized battery pack design and safe global shipping solutions