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Molicel INR18650-P28A

Molicel INR18650-P28A

Technical Specifications

Nominal Voltage: ~ 3.6 V
Typical Capacity: ~ 2,800 mAh (Minimum ~2,700 mAh)
Dimensions: Diameter approximately 18.30 mm ±0.30 mm; Height approximately 65.05 mm ±0.15 mm

Weight (Max): ~ 48.0 g (Max)

Max Charge Voltage / Cut-off: 4.20 V ±0.05 V 
Max Continuous Discharge Current: ~35 A (at specified temperature conditions)

Internal Resistance (AC 1 kHz): ≤ ~20 mΩ (fresh cell)
Operating Temperature Range:

Charge: 0 °C to 60 °C

Discharge: -40 °C to 60 °C

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Key Performance Highlights

  • High Discharge Capability: Rated for up to 35 A continuous current.
  • Solid Capacity: Nominal capacity of 2,800 mAh.
  • Low Internal Resistance: Approximately 20 mΩ (AC), supporting efficient high-current delivery.
  • Wide Operating Temperature Range:
    Charge: 0 °C to +60 °C
    Discharge: –40 °C to +60 °C
  • Fast Charging Support: Recommended standard charge current: ~2.8 A, and maximum up to 6 A (depending on thermal conditions).
  • High Energy Density: Volumetric energy density ~589 Wh/L (per Molicel).
  • Lightweight Design: Compact cylindrical 18650 form factor, weighing around 46 g max.
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INR18650-P28A certificatesMSDS, UN38.3, UL, CB, IEC62133, BIS, etc.

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Frequently Asked Questions

What is the discharge cutoff voltage?

The recommended discharge cut-off is 2.5 V.

How should the BMS / protection be configured for a pack using this cell?

  • Implement over-current protection, especially because of the 35 A continuous capability.
  • Monitor cell temperature closely: due to high current, thermal runaway risk increases if cells overheat.
  • Set appropriate voltage cutoffs: use 4.2 V for charge, 2.5 V for discharge, to protect cell integrity.

What are the storage considerations?

  • The cell’s discharge / self-discharge properties are good per Batemo testing.
  • When storing large batches, it's recommended to store cells at moderate state of charge (e.g., 40–60%) to minimize aging.

What are the suitable use-case scenarios (applications) for this cell?

  • High-drain, high-power applications: e.g., power tools, electric garden tools, and other high-current devices.
  • Use in battery packs where current performance is more critical than maximizing capacity.

What are potential sourcing or quality risks?

  • Validate each batch via test samples: check internal resistance (IR) and capacity.
  • Make sure to obtain the authorized Molicel datasheet and verify lot traceability.
  • When buying in high quantity, ensure suppliers provide UN38.3 / MSDS documentation for transportation compliance.

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