Molicel P42A Li-ion Cell, 4200mAh, 45A

The Molicel P42A is one of the most widely used 21700 Li-ion cells, trusted in both consumer and industrial applications. With a capacity of 4200 mAh and a 45 A continuous discharge rating, it has become a benchmark cell for high-power battery packs.

Its low internal resistance (~12–14 mΩ) ensures minimal voltage sag and consistent output, even under heavy loads. This makes it an excellent choice for FPV long-range drones, heavy-lift multicopters, VTOL aircraft, and endurance UAVs.

Often used in 6S2P (8400 mAh), 6S3P (12600 mAh) or larger packs, the P42A offers a great balance of energy density, discharge power, and cycle life. It is a go-to choice for builders who need both performance and reliability in demanding applications.

Key Specifications:

• Type: Li-ion Rechargeable Cell

• Model: Molicel P42A

• Format: 21700 cylindrical

• Nominal Capacity: 4200 mAh (4.2 Ah)

• Nominal Voltage: 3.6 V

• Full Charge Voltage: 4.2 V

• Cut-off Voltage: 2.5 V

• Max Continuous Discharge: 45 A

• Peak Discharge: up to 55 A (≤5 s)

• Internal Resistance (IR): ~12–14 mΩ (fresh cell)

• Energy: ~15.1 Wh

• Chemistry: NMC (LiNiMnCoO2)

• Dimensions: Ø 21 mm × 70 mm

• Weight: ~67–69 g

• Cycle Life: 400–600+ (with proper care)