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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