These tests below only note my personal opinion for the ESTIMATED ratings for the batteries I tested at the time I tested them. Any battery that is not a genuine Samsung, Sony, Murata, LG, Panasonic, Molicel, EVE, Lishen, BAK, or Sanyo can change at any time! This can be one of the hazards of using “rewrapped” 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 property damage, personal injury, or even death. Never use them outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous discharge rating (CDR), never let it get colder than 0°C or hotter than 60°C, and keep the plastic wrap and top insulating ring in perfect condition. Never use a battery that is physically damaged in any way.
Testing batteries at their limits is dangerous and should never be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.
If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.
Test Results
It’s been two years since I last tested the great performing P42A so a retest was due. These cells were made, I believe, in April 2024 and have the new CCC*** certification and its required wrap info (capacity, polarity, model number).
This cell performed essentially identically to the 2022-dated P42A’s. The DC internal resistance (IR) of the 2024 cells was almost 10% lower, which is good!
The short-version of the datasheet shows a continuous discharge graph for up to 30A. I agree, this is a cell rated at 30A continuous with a 45A non-continuous “temperature-limited” rating. You can run it at 45A but you must keep the cell temperature below 85°C absolute max and the recommended 75°C max. I used 80°C as the limit for my discharge testing.
Some other results and info…
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650 Ratings & Performance Table:
www.e-cigarette-forum.com
20700/21700 Ratings & Performance Table:
www.e-cigarette-forum.com
I want to work for the community full time! If you feel what I do is worth a couple dollars a month and you would like early access to battery availability, battery testing and news, and a say in what I test, then please consider becoming a patron and supporting my testing efforts: Get more from Battery Mooch on Patreon.
Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of property damage, personal injury, or even death. Never use them outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous discharge rating (CDR), never let it get colder than 0°C or hotter than 60°C, and keep the plastic wrap and top insulating ring in perfect condition. Never use a battery that is physically damaged in any way.
Testing batteries at their limits is dangerous and should never be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.
If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.
Test Results
It’s been two years since I last tested the great performing P42A so a retest was due. These cells were made, I believe, in April 2024 and have the new CCC*** certification and its required wrap info (capacity, polarity, model number).
This cell performed essentially identically to the 2022-dated P42A’s. The DC internal resistance (IR) of the 2024 cells was almost 10% lower, which is good!
The short-version of the datasheet shows a continuous discharge graph for up to 30A. I agree, this is a cell rated at 30A continuous with a 45A non-continuous “temperature-limited” rating. You can run it at 45A but you must keep the cell temperature below 85°C absolute max and the recommended 75°C max. I used 80°C as the limit for my discharge testing.
Some other results and info…
- DC IR measured 12.9mOhms and 13.1mOhms for two cells. This is fantastic consistency.
- Capacities were 4094mAh and 4150mAh. This is above this cell’s Minimum 4000mAh rating but didn’t meet its Typical 4200mAh rating. This has no effect on the measured performance and E-Scores for this cell though as the E-Score is what this cell can deliver.
- At or near room temp, 15°C to 45°C, you can charge at 8.4A (losing some cycle life though) but you must drop to 4.2A when at -10°C to 15°C or 45°C to 60°C . Do not charge when the cell is below -10°C or above 60°C. I recommend staying at room temp at 2A or lower for the longest cell life.
- These have a laser-etched number on the side of the metal can but they do not have the QR-style code box on the bottom like the P45B and P50B.
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650 Ratings & Performance Table:
18650 Battery Ratings and Performance Table
You are responsible for your own safety! These batteries are designed, manufactured, and sold only for use in a battery pack with the proper protection circuitry and battery management system. They were not designed for vaping (electronic...
www.e-cigarette-forum.com
20700/21700 Ratings & Performance Table:
21700 Battery Ratings and Performance Table
You are responsible for your own safety! These batteries are designed, manufactured, and sold only for use in a battery pack with the proper protection circuitry and battery management system. They were not designed for vaping (electronic...
www.e-cigarette-forum.com
I want to work for the community full time! If you feel what I do is worth a couple dollars a month and you would like early access to battery availability, battery testing and news, and a say in what I test, then please consider becoming a patron and supporting my testing efforts: Get more from Battery Mooch on Patreon.
