Molicel P45B 4500mAh – 45A | 21700

Molicel P45B (INR21700-P45B) is a high-current 4500 mAh Li-ion cell for powerful battery packs where both energy density and high constant current are important. An excellent choice for e-bikes, e-scooters, e-motorcycles and other 3.6 V rated voltage solutions (using BMS).

Specifications

• Format: 21700 (unprotected cell)
• Capacity (typical): 4500 mAh
• Nominal (“standing”) voltage: 3.6 V
• Max. charging voltage: 4.20 V
• Min. discharge voltage (cut-off): 2.50 V
• Chemistry: Li-ion INR
• Discharge current: up to ≈45 A constant*
  * Exact current allowed depends on BMS, cooling and system design.

Key benefits

• 4500 mAh capacity with high constant discharge – ideal for power modifications.
• INR chemistry is a good balance of energy density, safety and cyclicity.
• 21700 format – higher energy density than 18650 solutions.

Notes for use

• BMS (over/under voltage, current, short circuit protection) required.
• Spot welding (nickel/copper strips) is recommended; avoid overheating of cells during soldering.
• Charge only with Li-ion chargers according to specification; do not use damaged cells.

FAQ

Does the cell have built-in protection (PCB)?
No – this is an unprotected 21700 cell; use in packages with BMS.

Can a single cell be used separately?
Only with a suitable control/charging module and guards.

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