These tests below only note my personal 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, or Sanyo can change at any time! This is 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. They should never be used 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
Glad I retested this cell. In 2016 it didn’t perform as well as the Panasonic/Sanyo NCR18650GA but the cells I just tested performed noticeably better. The MJ1 now outperforms the NCR18650GA at 5A and equals it at 10A. This is a great performing cell!
Check my 18650 Ratings and E-Scores table (link below) to see how the MJ1 performed against other cells.
While you can run this cell at 10A I recommend staying below about 5A-7A to help reduce voltage sag, improve performance, extend cell life, and reduce risk. Especially if the cells are in a battery pack where they heat each other up. Never let these cells get over 60°C!
The two cells I tested delivered 3451mAh and 3467mAh. This is great consistency and is typical of cells from the big manufacturers. The cells I tested exceeded their 3400mAh minimum capacity rating but did not meet their 3500mAh nominal capacity rating. I’m rating them at 3400mAh since I can’t have the lowest capacity cells in the batch.
Two cells were purchased by me for testing from 18650BatteryStore (18650 Battery Store - Lithium Ion Batteries, Chargers and Accessories).
18650 Ratings and E-Scores Table:
18650 Battery Ratings Table | E-Cigarette Forum
20700/21700 Ratings and E-Scores Table:
20700/21700 Battery Ratings | E-Cigarette Forum
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
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: Battery Mooch is creating battery and device tests | Patreon.
To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of property damage, personal injury, or even death. They should never be used 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
Glad I retested this cell. In 2016 it didn’t perform as well as the Panasonic/Sanyo NCR18650GA but the cells I just tested performed noticeably better. The MJ1 now outperforms the NCR18650GA at 5A and equals it at 10A. This is a great performing cell!
Check my 18650 Ratings and E-Scores table (link below) to see how the MJ1 performed against other cells.
While you can run this cell at 10A I recommend staying below about 5A-7A to help reduce voltage sag, improve performance, extend cell life, and reduce risk. Especially if the cells are in a battery pack where they heat each other up. Never let these cells get over 60°C!
The two cells I tested delivered 3451mAh and 3467mAh. This is great consistency and is typical of cells from the big manufacturers. The cells I tested exceeded their 3400mAh minimum capacity rating but did not meet their 3500mAh nominal capacity rating. I’m rating them at 3400mAh since I can’t have the lowest capacity cells in the batch.
Two cells were purchased by me for testing from 18650BatteryStore (18650 Battery Store - Lithium Ion Batteries, Chargers and Accessories).
18650 Ratings and E-Scores Table:
18650 Battery Ratings Table | E-Cigarette Forum
20700/21700 Ratings and E-Scores Table:
20700/21700 Battery Ratings | E-Cigarette Forum
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
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: Battery Mooch is creating battery and device tests | Patreon.
To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
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