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Molicel P42A 4200mAh 21700 battery is a rechargeable lithium-ion cell built for high-drain devices that need both strong output and long runtime. It provides 4200mAh nominal capacity, 30A continuous discharge, and a 3.6V nominal voltage.
This Molicel INR21700 P42A cell uses a flat-top, unprotected 21700 format, measuring roughly 21mm × 70mm. Its larger 21700 size gives it more energy capacity than many 18650 cells, while its 30A discharge rating works well in powerful devices such as vape mods, bright torches, battery packs, and testing projects.
Molicel, the battery brand of E-One Moli Energy, produces the P42A for consistent lithium-ion performance. The cell suits users who need a balance of capacity, current delivery, and reliable voltage behaviour under load.
Molicel 21700 P42A 4200mAh 45A battery supports high pulse output up to 45A and maintains voltage stability under load.
Key performance advantages:
This combination makes it a preferred cell for advanced vape users and engineers.
| Attribute | Value |
|---|---|
| Brand | Molicel |
| Model | INR21700 P42A |
| Battery Size | 21700 (21mm × 70mm) |
| Capacity | 4200mAh |
| Nominal Voltage | 3.6V to 3.7V |
| Max Charge Voltage | 4.2V |
| Continuous Discharge | 30A |
| Peak Pulse Discharge | Up to 45A |
| Chemistry | INR Lithium-ion |
| Top Type | Flat Top |
| Protection | Unprotected |
| Rechargeable | Yes |

Molicel P42A 21700 battery powers high-drain electronics requiring consistent current delivery.
Here is a list of compatible devices:
Devices requiring stable amperage benefit most from this cell.
Molicel P42A balances capacity and discharge better than many competitors.
| Model | Capacity | Continuous Discharge | Use Case |
|---|---|---|---|
| Molicel P42A | 4200mAh | 30A | Balanced performance |
| Samsung 40T | 4000mAh | 30A | High-drain focus |
| LG M50LT | 5000mAh | ~15A | High capacity, low drain |
The P42A suits users needing both runtime and power output.
Yes, the Molicel P42A is safe when used within specifications. It operates between 2.5V and 4.2V and performs best below 30°C.
Here are steps to keep your equipment safe:
Authentic cells show consistent manufacturing traits.
Use these checks to confirm your Molicel P42A battery is authentic:
Buy only from verified UK suppliers Royal Vapery for authenticity.
Molicel P42A provides 4200mAh capacity, enabling longer runtime compared to standard 3000mAh to 3500mAh cells.
The battery supports 30A continuous discharge and up to 45A pulse output under controlled conditions.
Yes, the Molicel 21700 vape battery supports sub-ohm vaping due to its high current output and voltage stability.
The cell operates at 3.6V to 3.7V nominal and charges up to 4.2V.
Molicel batteries are produced by E-One Moli Energy, a Taiwanese manufacturer with global distribution.
The battery typically lasts 300 to 500 charge cycles, depending on usage patterns and charging conditions.
You can buy Molicel batteries such as the P28A 18650 and P42A 21700 from trusted UK vape retailers like Royal Vapery, which offers authentic, high-drain lithium-ion cells suitable for vape mods and other devices.
Orders over £50 qualify for free standard delivery across mainland UK. Delivered within 2-3 business working days.
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