INR21700-P45B — 21700 lithium-ion cell

Name: Molicel INR21700-P45B 21700 Li-ion Cell 4,500 mAh 45 A
Brand: Molicel
SKU: INR21700-P45B

Molicel INR21700-P45B: 4,500 mAh typical, 3.6 V nominal, 45 A discharge rating, 3 C (13.5 A) fast charge, 69.0 g max, about 16.2 Wh per cell. Molicel lists it across drones and eVTOLs, two-wheeled motorcycle racing and hyper EV applications.

Molicel21700NMC3.6 V4,500 mAh45 A dischargeData sheet on file

Specification

INR21700-P45B parameters

Parameter	Value
Brand	Molicel
Model	INR21700-P45B
Form factor	21700
Chemistry	NMC
Nominal voltage	3.6 V
Typical capacity	4,500 mAh / 16.2 Wh
Minimum capacity	4,300 mAh
Standard charge current	4.5 A
Maximum charge current	13.5 A
Discharge current	45 A
Peak discharge power	184 W (10 s, 90% SOC)
Internal resistance	AC 7 mΩ (30% SOC) · DC 15 mΩ (50% SOC)
Cycle life	500+ cycles to 80% at 100 W discharge
Energy density	643 Wh/L · 242 Wh/kg
Weight	70 g (Max)
Diameter	21.55 mm (Max)
Height	70.15 mm (Max)
Charge temperature	0 °C to 60 °C
Discharge temperature	-40 °C to 60 °C

About the Molicel INR21700-P45B 21700 Li-ion Cell 4,500 mAh 45 A

The P45B is Molicel's ultra-high-power 21700 and appears on the company's own application matrix under drones and eVTOLs, two-wheeled motorcycle racing, and hyper EVs and racing sports cars. 4,500 mAh with a 45 A discharge rating and 3 C fast charging at 13.5 A is the combination that gets it there — the cell recovers between runs as fast as it delivers.

Why pack builders specify it

45 A discharge rating at 4,500 mAh, a power-to-energy ratio Molicel builds its whole P-series around
3 C fast charge at 13.5 A, so airborne and track packs turn around between sorties
Listed by Molicel for drones/eVTOLs, racing motorcycles and hyper EVs, not just power tools
Discharge rated down to -40 °C, which matters for high-altitude UAV work

Typical applications

Heavy-lift and industrial drones – High discharge with fast turnaround between flights
eVTOL and electric aircraft – Molicel positions the P-series for the vertical take-off and landing segment where peak power is sized in seconds
Racing motorcycles and e-motorsport – Short, repeated high-power events with limited cooling
Professional power tools – Cordless equipment that ships with fast chargers and short duty cycles

Where it fits

The P45B is right when both peak power and recharge time are constrained. If the duty cycle is long and hot rather than short and sharp, the P50B is the better cell — Molicel rates it at roughly double the cycle life under 100 W discharge.

Charging and pack integration

Charge CC-CV to 4.2 V within the current limits listed above and stop discharge at 2.5 V. These are unprotected industrial cells: a BMS or protection circuit is required, interconnects must be resistance or laser welded rather than soldered, and cells of different model, batch or state of charge must not be mixed in one pack. Charging below 0 °C is not permitted unless the pack implements a low-temperature charge strategy.

Certifications and documentation

UN38.3, MSDS, IEC 62133-2, UL 1642, CE, RoHS, REACH. UN38.3 test summary, MSDS and the cell specification are available on request.

Packaging

Quantity per box	130 pcs
Gross weight per box	10.2 kg
Box dimensions	420 × 230 × 200 mm

Specification basis: Official Molicel product data.

Questions about this cell

The P50B adds 500 mAh, raises discharge to 60 A, supports 5 C charging and roughly doubles cycle life to 1,400 cycles at 100 W discharge. The P45B remains the value option where duty cycles are short.

13.5 A. It requires a charger and pack thermal design built for that rate; it is not the standard charge current.

Discharge is rated to -40 °C. Charging below 0 °C is not permitted without a low-temperature charge strategy in the BMS.

Manufacturer data sheet

The original product data sheet published by the manufacturer, not a reseller summary.

Download PDF

Document version v1.2

At a glance

Capacity4,500 mAh

Voltage3.6 V

Discharge45 A

Max charge13.5 A

Weight70 g (Max)

ImpedanceAC 7 mΩ (30% SOC) · DC 15 mΩ (50% SOC)

Downloads

INR21700-P45B product data sheet (PDF)PDF

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Compare

Other 21700 cells to quote against

Model	Brand	Capacity	Discharge	Data sheet
INR21700-M50LT	LG Energy Solution	4,800 mAh	14.4 A	Pending
INR21700-P42A	Molicel	4,200 mAh	45 A	On file
INR21700-50GB	Samsung SDI	4,900 mAh	9.8 A	Pending
INR21700-P50B	Molicel	5,000 mAh	60 A	On file

Capacity and discharge figures are the values held for each model; where no manufacturer data sheet is on file the row is marked pending rather than presented as verified.

Applications

Duties this grade of cell is specified for

Application

Where else to look

18650 Cells 18500 & 22700 Cells Prismatic Cells All Molicel cells 21700 cell guide Cell selection guide

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