Molicel INR-21700-P45B 4500mAh 10C Li-Ion Cell

The Molicel INR-21700-P45B is a premium high-drain lithium-ion cell, standing as the current benchmark for custom FPV flight packs. Delivering 4500mAh capacity and a true 45A continuous discharge rating, it bridges the gap between traditional low-discharge Li-Ions and heavy LiPos. This makes it an exceptional choice for long-range 7-inch cruisers, high-endurance fixed-wing drones, and cinelifters requiring extended flight times without sacrificing throttle punch.

Key features

• Massive 45A continuous discharge rating, significantly outperforming older 21700 cells like the P42A.
• Exceptionally low internal resistance reduces voltage sag during aggressive throttle inputs.
• Unprotected flat-top positive terminal, ideal for tight packing and spot-welding.
• Maintains stable thermal performance and longer cycle life under sustained high-amp FPV loads.

Specifications

• Model: INR-21700-P45B
• Cell size: 21700
• Nominal capacity: 4500mAh
• Nominal voltage: 3.6V
• Charge / cut-off voltage: 4.2V / 2.5V
• Charge current: 4.5A standard, 13.5A maximum
• Max continuous discharge: 45A (10C)
• Typical DC impedance: 15mΩ
• Dimensions: 21.55 x 70.15 mm
• Terminal type: Flat top (unprotected)
• Weight: 70g

When assembling custom 4S or 6S flight packs with the P45B, ensure you use correctly rated pure nickel strip and a high-quality spot welder to safely handle the heavy current output this cell can deliver.