Molicel 21700 P42A 4200mAh 45A Battery

$13.00 $20.00


  • Molicel 21700 P42A 4200mAh 45A Battery

    Here is the Best All-Around cell made in the 21700 form factor size. With a minimum capacity of 4,000 mAh in capacity and a typical capacity of 4,200 mAh while having up to a 45 Amp Maximum Continuous Discharge Rating, gives this cell its place on top of the mountain. Although you may not get the best life cycle out of this cell if you always run it at 45 amps continuously, but the cell can definitely handle this demand without any issue. This cell hits the hardest for the longest, when seen on the discharge with capacity graph. This cell also has the amazing ability to give you very high capacity, while giving you an insanely high discharge/drain ability without making any compromise. This attribute makes it the best all-around cell in its 21700 form factor size. These cells come straight from Molicel via their distributor (NPE) directly to us here at 18650 Battery Store. So these cells are very fresh and you will have a complete "Peace Of Mind" that your getting both Authentic and Grade-A quality cells from us. These cells are truly a miraculous cell for many devices that accept the 21700 form factor size. With this cell you will now be able to unlock your device(s) true potential.

    We are an authorized distributor of E-One Moli Energy Corp. (Molicel) & New Power Energy (NPE). Grade A cells and fresh production dates only.

    Please note this battery is size 21700, ~21.4mm x 70mm


    • Model: INR-21700-P42A
    • Size: 21700
    • Style: Flat Top
    • Nominal Capacity: 4200mAh
    • Continuous Discharge Rating: 45A
    • Nominal Voltage: 3.6v
    • Protected: No
    • Rechargeable: Yes
    • Approximate Dimensions: 21.40mm x 70.00mm
    • Approximate Weight: 67.8g

    All batteries contain a label decal stating the approximate voltage and capacity. This label is easily removed to reveal the manufacturer print. The label decal is a requirement by the U.S. Government (IATA) which regulates the shipping of lithium ion batteries.


    The user must have appropriate understanding of lithium ion batteries before purchase. Use caution when working with and using lithium ion batteries as they are very sensitive to charging characteristics and may explode, burn, or cause a fire if misused or mishandled. Always charge in or on a fire-proof surface. Never leave batteries charging unattended. This battery is sold for the use of system integrations with proper protection circuitry or battery packs with a battery management system or PCB (circuit board/module). Buyer is responsible for any damage or injury caused by misuse or mishandling lithium ion batteries and chargers. Charge only with a smart charger designed for this specific type of lithium ion battery.

    • Misusing or mishandling lithium ion batteries can pose a SERIOUS RISK of personal injury, property damage, or death
    • ONLY use with proper protection circuitry
    • ONLY use within manufacturer specification
    • DO NOT store loose in pocket, purse, etc. – always use a protective case
    • KEEP AWAY from metal objects to prevent short circuiting
    • DO NOT short circuit
    • DO NOT use if wrapper or insulator is damaged or torn
    • DO NOT use if damaged in any way
    • DO NOT overcharge or over-discharge
    • DO NOT modify, disassemble, puncture, cut, crush, or incinerate
    • DO NOT expose to liquids or high temperatures
    • DO NOT solder
    • User must be familiar with handling lithium ion batteries before purchase
    • Usage of batteries is AT YOUR OWN RISK

    Local regulations and laws pertaining to the recycling and disposal of lithium ion batteries vary so please consult your local jurisdiction regarding appropriate disposal. Many retail stores offer free recycling of rechargeable batteries.


Bench Retest Results: Molicel P42A 4000mAh 40T, one of the best batteries available

Bottom Line: This is a retest of this incredible performing 21700 which hits harder and runs for longer than the Samsung 40T. It even competes with the Samsung 30T at 30A. The 30T hits harder for about the first third of the discharge but then the P42A holds its voltage up better and hits harder for the rest of the discharge.

If you use a mech and you change cells early then the 30T is the better choice because it hits harder at the start. But if you run your cells down to 3.5V-3.6V (when put on the charger), and wanted a slightly more consistent vape that could run for longer, then the P42A is worth trying.

They are a bit larger than the Samsung 30T and 40T and might not fit in a mod where the Samsung’s are already a snug fit.

The P42A is my choice for best all-around performing cell of any size and best choice for a regulated mod for use from about 40W-90W each (80W-180W in a two-battery mod). Below that there are ultra-high capacity cells like the Samsung 50E2 that are a better choice. At above 90W each or so the Samsung 30T could be the better choice. Try the P42A and 30T and see which performs better for the way you vape.

The datasheet for the P42A lists 45A as the max continuous current rating but notes that cycle life is reduced at high current levels. Running this cell continuously at 45A gets it much too hot for that to be a continuous current rating we can use for comparing to other cells.

The datasheet lists the minimum capacity at 4000mAh. The six P42A’s I tested delivered 4115mAh - 4142mAh at 800mA (0.2C) down to 2.5V. This is great consistency and they all easily meet their minimum capacity rating.

I am rating this Molicel at 30A continuous with a temperature-limited rating of 40A as long as you stop before the cell reaches 75°C.

Four cells were donated for the purposes of testing by Moli ( and N-Power Energy, Ltd. ( and two cells were purchased from Liion Wholesale by me.

Ratings graphic:

Test report:

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These tests only note the ESTIMATED ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, LG, Panasonic, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” batteries or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.

Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of personal injury or property damage. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s continuous current rating and keep the plastic wrap and top insulating ring in perfect condition.

Any rating in my ratings tables can change at any time as different grade cells appear on the market, we get swamped with fakes, or new information becomes available to me. Please, never assume that the ratings in the tables are permanent and will never change! Always download the latest version before considering any cell purchase.

To see how other cells have tested check out this link:…/list-of-battery-tests.…/

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