Description
The Crocks Pack Molicel INR 21700 P42A 14.8V 4200mAh 4S1P 40A/50A Discharge Li-ion Drone Battery Pack
is a compact and high-performance lithium-ion battery pack tailored for advanced drone setups and RC applications that need a balanced mix of voltage and endurance. The pack uses four genuine Molicel P42A 21700 cells, wired in a 4-series configuration, to deliver a nominal voltage of 14.8 V (4 × ~3.6 V) and a capacity of 4200 mAh
Each Molicel P42A cell is known for its excellent power handling capabilities, with a continuous discharge rating of 45 A according to its datasheet. To reflect practical pack design and safety, this 4S pack is rated to reliably support 40 A continuous discharge, with headroom for up to 50 A peak bursts
The Molicel P42A specifications make it a trusted choice: it features very low internal resistance (about 10 mΩ AC) a nominal cell voltage of 3.6 V, a standard full charge voltage of 4.2 V, and a safe cutoff at 2.5 V. Each cell measures 21.7 mm in diameter × 70.2 mm in height and weighs up to 70 g.
In the pack, a 4-cell balance connector allows for safe and even charging of each series cell, while a sturdy discharge lead handles high current demands. The pack is built with robust internal wiring and structural support
Key Features
Nominal Voltage: 14.8 V (4S)
Capacity: 4200 mAh
Rated Continuous Discharge: 40 A
Peak Discharge: 50 A
High-Quality Cells: Uses Molicel INR‑21700 P42A — 4200 mAh, 45 A spec
Low Internal Resistance: ~10 mΩ (AC)Safe Charging: 4-cell balance connector included
Compact & Durable Build: Suitable for drone installations
Wide Operating Temperature: –40°C to +60°C (per cell spec)
Applications
4S FPV racing drones
Medium-size multirotors / quadcopters
Fixed-wing RC aircraft needing higher voltage
DIY drone or UAV projects
RC vehicles / robots where 14.8 V helps improve power efficiency
