26700 4000mAh 3.2V LiFePO4 Cylindrical Cell 0.5C Charge Discharge 2000 Cycles High Energy Density Lithium Iron Phosphate Battery Cell For Energy Storage DIY Battery Pack

This 26700 3.2V 4000mAh cylindrical LiFePO4 cell is a high-stability raw cell for custom energy storage packs. It addresses common defects of generic lithium cells such as low energy density, unstable 0.5C current output and short service life. Adopting lithium iron phosphate material, it delivers over 135Wh/kg energy density, stable 0.5C standard charge & discharge performance, and supports up to 2000 charge cycles. With low internal resistance below 20mΩ, it outputs consistent power with low heat generation, and works reliably from -10℃ to 60℃ during discharge, suitable for assembling solar storage, small power equipment and light electric vehicle battery packs.

• Safe LiFePO4 Raw Material
  Excellent thermal stability, effectively avoid thermal runaway risks during frequent charge and discharge cycles.
• High Energy Density
  Energy density over 135Wh/kg, provides larger capacity within the same cell size for compact battery assembly.
• Stable 0.5C Standard Current Performance
  2000mA standard charge and discharge current, smooth power output without severe voltage drop.
• Long Cycle Lifespan
  Supports up to 2000 full charge-discharge cycles, reducing cell replacement frequency for finished battery packs.
• Wide Working Temperature Range
  Discharge normally at -10℃ low temperature, fit indoor and mild outdoor equipment power supply scenarios.
• Ultra-Low Internal Resistance
  AC internal resistance controlled under 20mΩ, less heat accumulation under continuous current operation.

• Match cell series-parallel combinations to build finished battery packs per customer voltage & capacity demands
• Sort cells by consistent internal resistance and voltage for uniform batch assembly
• Custom bulk sorting, cell grouping and pre-welding service for pack manufacturers
• Support customized export packaging and marking for cell distributors
• Accept small trial cell orders and flexible mass production schedules

• Pre-sales technical consultation: Engineers provide cell matching guidance for battery pack assembly projects within 24 hours.
• Full batch inspection: Each cell undergoes capacity, internal resistance and voltage testing before delivery.
• After-sales technical guidance for cell assembly, series-parallel connection and matching debugging.
• Supply MSDS, UN38.3 certification documents to clear customs for global sea and air shipments.
• Stable long-term cell supply support for battery pack manufacturers and distributors.

• Packing
  Cells are packed with insulating separators inside standard export cartons to prevent short circuit and collision damage. Reinforced wooden cases can be arranged for large bulk orders. All packages carry standard battery hazard labels for customs inspection.
• Shipping
  Complete dangerous goods certification documents support sea freight, air freight and international cargo delivery. Tracking number will be sent once goods dispatched, and we will track shipment progress until receipt.

Q1: Can I connect these cells in series and parallel to build my own battery pack?

A1: Yes, this 26700 LiFePO4 cell supports flexible series-parallel grouping. We suggest matching a corresponding BMS protection board for assembled packs.

Q2: What charger should I use for single cell charging?

A2: Use a dedicated 3.65V LiFePO4 CC-CV charger, avoid mismatched voltage chargers to prevent cell damage.

Q3: Is this cell suitable for outdoor low-temperature equipment?

A3: It can discharge steadily from -10℃ to 60℃, suitable for mild cold outdoor working environments.

Q4: Do you provide bulk cells for battery pack manufacturers?

A4: We support large wholesale, cell sorting and pre-processing customization. Contact sales team for bulk preferential pricing.

Q5: How many cycles can this cell reach in daily use?

A5: It can reach up to 2000 full charge and discharge cycles under standard 0.5C working conditions.