Molicel (E-One Moli Energy Corp.) INR-21700-P50B
Series: Molicel (E-One Moli Energy Corp.) Battery cells for drone packs
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The Molicel INR-21700-P50B is a high-power round cell in the 21700 format from Molicel (E-One Moli Energy Corp.), a maker based in Taipei, Taiwan. It belongs to the P series, which is widely used in lithium-ion packs for long-range FPV and drones, and is intended for small FPV drones that need high capacity and high current at the same time.
The cell stores 5,000 mAh at 3.6 V nominal voltage, which is 18.0 Wh, at 265 Wh/kg. The continuous discharge current is 60 A, which is 12C, calculated from current and capacity, and applies with cut-off at 80 °C: how long 60 A may flow is set by the cell temperature. At full current the cell would be empty after five minutes. The weight is at most 71 g according to the data sheet in version 1.1.
Six cells in series (6S1P) come to 108 Wh and so lie between the IATA limits of 100 and 160 Wh; there the airline must agree to carriage of spare batteries. Lithium cells must also meet the tests of UN 38.3 for transport and are packed protected against short circuit. Joining cells into a pack belongs in a specialist workshop with test and protection equipment.
At 60 A, cell connectors and contact surfaces in the pack carry a large part of the load, and any poor joint becomes a heat source. When choosing, a pack with a temperature sensor and a current well below the cell value is advisable. Heat and deep discharge shorten life, and in the cold the voltage sag grows. Molicel releases the data sheet through a contact form; because counterfeits are common, use only reputable dealers.
Technical data
Other data
| C-rate | 12correct |
|---|---|
| Capacity (mAh) | 5,000correct |
| Cell chemistry | Li-Ioncorrect |
| Cell count (S) | 1Scorrect |
| Continuous current (A) | 60correct |
| Energy (Wh) | 18correct |
| Energy density (Wh/kg) | 265correct |
| Form factor | 21,700correct |
| Nominal voltage (V) | 3.6correct |
| Weight (g) | 71correct |
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