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 to help lower the risks and extend cell life, 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.
C
Test Results
YOU USE THESE CELLS AT YOUR OWN RISK! We do not know for sure if these are actually EVE 50PL’s.
These are allegedly pre-production samples of the tabless EVE 50PL but might be “rewrapped” (not in factory wraps) since “EVE” is on all their other cells but not these. These have the same bottom laser-welding spiral as the 40PL though.
There is an unconfirmed rumor that the EVE 50PL has a short cycle life due to it being created for use in military drones. This is where absolute max performance is critical and compromising that to ensure decent cycle life isn’t needed.
I don’t know if this is true or not but if you use these cells and feel their performance “fades” faster than than expected please let me know. I did some preliminary cycle life testing and didn’t see any fast degradation though.
Just for reference…the Ver. A datasheet for the EVE 50PL has no cycle life spec. The 40PL’s Ver. A datasheet does. Pajda, a highly respected tester at the Endless Sphere forums, and I will be testing cycle life but that can take up to a couple of months to finish.
On to performance…at 20A and higher this cell equals or beats any other small round cell I have tested. At above 20A, up to 50A continuous, this is the best performer I’ve ever tested. Check the Ratings & Performance table for the numbers (link below).
I’ve done a 40A and 100A continuous “shootout” against the other top four 21700’s but the results are Patreon-only.
If this cell does have decent cycle life then the performance could definitely make buying this cell worth considering.
Thank you DIY500AMP.com for donating cells for testing!
Some specs and observations…
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650 Ratings & Performance Table:
www.e-cigarette-forum.com
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 to help lower the risks and extend cell life, 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.
C
Test Results
YOU USE THESE CELLS AT YOUR OWN RISK! We do not know for sure if these are actually EVE 50PL’s.
These are allegedly pre-production samples of the tabless EVE 50PL but might be “rewrapped” (not in factory wraps) since “EVE” is on all their other cells but not these. These have the same bottom laser-welding spiral as the 40PL though.
There is an unconfirmed rumor that the EVE 50PL has a short cycle life due to it being created for use in military drones. This is where absolute max performance is critical and compromising that to ensure decent cycle life isn’t needed.
I don’t know if this is true or not but if you use these cells and feel their performance “fades” faster than than expected please let me know. I did some preliminary cycle life testing and didn’t see any fast degradation though.
Just for reference…the Ver. A datasheet for the EVE 50PL has no cycle life spec. The 40PL’s Ver. A datasheet does. Pajda, a highly respected tester at the Endless Sphere forums, and I will be testing cycle life but that can take up to a couple of months to finish.
On to performance…at 20A and higher this cell equals or beats any other small round cell I have tested. At above 20A, up to 50A continuous, this is the best performer I’ve ever tested. Check the Ratings & Performance table for the numbers (link below).
I’ve done a 40A and 100A continuous “shootout” against the other top four 21700’s but the results are Patreon-only.
If this cell does have decent cycle life then the performance could definitely make buying this cell worth considering.
Thank you DIY500AMP.com for donating cells for testing!
Some specs and observations…
- Datasheet capacity specs are 4800mAh Minimum and 5000mAh Typical.
- The five cells I tested measured 4985mAh-5011mAh with an average of 4994mAh, just below the Typical spec. Not great consistency but okay, especially if these are pre-production cells. Considering the differences in equipment I consider these cells to be meeting their spec but would prefer to see them hit around 5100mAh like many cells from Samsung and others would (for a 5000mAh-rated cell).
- DC internal resistance was 6.4mOhms to 6.9mOhms for five cells. This is decent consistency.
- I estimate its current ratings to be 50A continuous with a 125A temp-limited (to 80°C) non-continuous rating. Never let the cell go above 80°C at any time if using a thermocouple for temp sensing or above 65°C if using a thermistor (which are VERY slow)! This includes the temp rise that can still occur after a high power discharge has stopped
- Standard charge rate 2A, max is 10A but I am sure that will shorten cycle life.
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
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.
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