Molicel P42A 21700 INR 4200mAh Battery

Molicel P42A 21700 INR 4200mAh Battery

The Molicel P42A 21700 4200mAh Battery is a single lithium-ion cell in the 21700 size, with a 3.6V nominal voltage and a flat-top, unprotected build. Capacity is rated at 4200mAh typical and 4000mAh minimum, and the cell is charged to 4.2V on an external charger.

Molicel rates the cell for a 45A maximum continuous discharge, while 30A is the figure vape mods are normally matched to. It fits regulated mods with a removable 21700 bay and is supplied as one battery, so a second cell or a charger is bought separately.

What to Know About the Molicel P42A

• 4200mAh typical capacity in the 21700 size
• 45A maximum continuous rating from Molicel, with 30A the usual vape figure
• Flat-top, unprotected cell for regulated mods
• Fits 21700 battery bays only, not 18650 or 20700
• Sold as one battery, with no charger included

Features of Molicel P42A 21700 4200mAh Battery

Four ratings matter when a cell is matched to a mod: capacity, discharge, construction and charge rate. Each is set out below, along with what to check on Box Mods first.

4200mAh Typical Capacity

The cell is rated at 4200mAh typical, with a 4000mAh minimum, and 15.5Wh of energy is stored at the typical figure. A Molicel 4200mAh cell is larger than an 18650 in both diameter and length. Runtime still depends on the mod and the wattage it is run at. Swapping in a spare is quick.

45A Maximum Discharge Rating

Molicel gives 45A as the maximum continuous discharge, with the cell cut off at 2.5V. Vape mods are normally matched to 30A continuous instead, which leaves headroom on most regulated devices. The mod's wattage and cell count decide the current drawn per cell, so both should be checked against that figure first.

Flat-Top, Unprotected Cell

Every cell is a flat-top, unprotected design, which suits bays with flat contacts. Nothing inside the wrap guards against over-discharge or short circuits, so those cut-outs come from the mod itself. A 21700 vape battery in this form lies flush against the bay contacts.

4.2A Standard Charge Rate

The standard charge current is 4.2A, and a full charge to 4.2V takes about 1.5 hours. Charging is done in an external charger, as the cell carries no USB or other input of its own. Charging is best kept at or below the rated current, which makes a charger with adjustable current worth checking.

How to Fit the Molicel P42A

Very little is needed for fitting: a charged cell and a mod with a removable 21700 bay.

Step 1: The cell is slid out of any packaging and its wrap is checked for tears, dents or exposed metal.

Step 2: A full charge is given on an external Li-ion charger set to 4.2V, since the cell has no charge port.

Step 3: The flat positive end is lined up with the polarity marks printed inside the battery bay.

Step 4: The cell is eased into the bay and the door is closed until it clicks into place.

Step 5: Battery level is read from the mod's screen before the first session, and a full charge is not assumed.

Step 6: A spare cell is best carried in a Carry Cases unit, because loose coins or keys can bridge the terminals of an unprotected cell.

What's in the Molicel P42A Pack

Only the cell itself is supplied, without any kit around it.

• 1x Molicel P42A 21700 4200mAh Battery

Neither a charger nor a device is bundled.

Devices Compatible With the Molicel P42A

Any device with a removable 21700 bay takes a Molicel 21700 cell like this one, including single-cell and dual-cell Regulated Mods that list 21700 batteries in their manuals.

An 18650 bay is too narrow for a 21700 cell, and a 20700 bay is too short. Devices with a sealed, built-in battery cannot take it either. The battery compartment sticker or the manual gives the quickest confirmation of cell size before an order is placed.

About Molicel and the INR-21700-P42A

Molicel cells are built by E-One Moli Energy, which runs facilities in Taiwan and Canada. The P42A appears in the range as INR-21700-P42A, and full charge, discharge, temperature and cycle curves are published for it in a data sheet.

That published detail is why the ratings above are stated as they are. Pirate Vapes also carries the Molicel P26A in the smaller 18650 size, for mods that take the older cell format.

Stock Up on the Molicel P42A

A dual-cell mod needs a second cell. Bay chargers and carry cases are the usual extras, and anyone looking for a Molicel P42A UK cell to keep as a spare can add both in one order. Chargers for 21700 cells are listed under Battery Chargers.

Tracked 24 orders placed before 3:30pm on a weekday are dispatched that same day. Checkout at Pirate Vapes verifies age before any hardware is sent, and sales are for over-18s only.

Conclusion

This battery suits owners of regulated mods with a 21700 bay who want a high-capacity cell as a backup or a like-for-like swap. It also works as a first cell for a new device, once a matching charger is on hand.

A charger and case from Vape Accessories finish the order, and the wider range of cells is listed at Pirate Vapes.

FAQs

Is the Molicel P42A 21700 battery protected or unprotected?

The cell is an unprotected flat-top design with no circuit board under the wrap. Over-discharge and short-circuit cut-outs are handled by the mod, so the device needs to provide them.

What is the continuous discharge rating of the Molicel P42A?

Molicel lists a maximum continuous discharge of 45A for the cell. Vape mods are normally matched to 30A continuous, which is the figure to compare with the mod's current draw.

Does the Molicel P42A fit 18650 or 20700 mods?

The cell fits removable 21700 bays only. An 18650 bay is too small for it, and a 20700 bay is too short, so the mod's manual should be checked before ordering.

Does the P42A battery come with a charger?

A single cell is supplied and no charger is included. Charging is not possible through the cell itself, so a separate bay charger is needed.

How long does the Molicel P42A take to charge?

Molicel lists 1.5 hours for a full charge at the standard 4.2A current, ending at 4.2V. Other chargers vary with the current they supply.

How many batteries come in one order of the Molicel 4200mAh cell?

One Molicel P42A is supplied per order. Owners of dual-cell mods who need a matched pair should order two.