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• Charging & Maintenance Guidelines‌

  ‌Recommended Charging Method‌:
  Use a ‌dedicated single-cell (1S) CC/CV lithium-ion charger‌ set to ‌4.2V ±0.05V‌.

  • ‌Optimal charge current‌: ‌0.2C = 220mA‌ → maximizes cycle life (>600 cycles)
  • ‌Maximum charge current‌: ‌0.5C = 550mA‌ → acceptable for fast charging in consumer devices (reduces cycle life to ~400–500 cycles)
  • ‌No balancing required‌: As a single-cell design, voltage uniformity is inherent — simplifies charger design and reduces system cost.

  ‌Storage Guidelines‌:

  • ‌Short-term storage (<1 month)‌: Maintain at ‌3.8–4.0V‌ (40–80% state of charge)
  • ‌Long-term storage (>1 month)‌: Store at ‌3.7V (~50% charge)‌ in a cool, dry environment (‌15–25°C‌)
  • ‌Recharge interval‌: Recharge every ‌3 months‌ if unused to prevent deep discharge and permanent capacity loss

  ‌Operating Environment‌:

  • ‌Charge temperature‌: ‌0°C to 45°C‌
  • ‌Discharge temperature‌: ‌-10°C to 60°C‌ (optimized for body-worn use)
  • ‌Avoid‌: Exposure to water, metal contact, crushing, puncture, or direct sunlight

  ‌Safety Warnings‌:

  • ❌ Never disassemble, pierce, or modify the cell or PCM
  • ❌ Never charge with multi-cell, NiMH, or non-lithium chargers
  • ❌ Never expose to temperatures >65°C or < -20°C
  • ✅ Always use original or certified replacement chargers
  • ✅ Store away from flammable materials and conductive surfaces