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, Ampace, Sinowatt, 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.
Test Results
The best performing power 18650 I’ve tested WHEN NEW. Cycle life and consistency haven’t been tested yet and both of those were problems with the LT-branded JP40’s (LT 22710A) along with some early cell failures (zero volts when received or quickly dropping to zero volts after a bit of use).
This appears to be the Ampace JP30, but not proven yet, in the original factory wrap but with the original printing washed off to varying degrees. On some of these wraps you can still see hints of “Ampace” printing. This washing/rebranding is what LT did with the JP40 too.
This LT 19660A cell is an incredible performer but we don’t know what grade they are (which affects out-of-box consistency and performance) and the JP30’s ratings are confusing. I strongly recommend testing these before committing to building large packs with them. Make sure you have a VERY good BMS installed too.
Just like with the JP40, I’m sure we’ll see other wrapped versions of the JP30 and then eventually original Ampace factory-wrapped cells that will have a better chance of being high grade. Right now I’m sure 100% of Ampace’s high grade cells are instantly being bought up and we’ll have to wait until a big customer sells off some excess inventory or Ampace can start making them faster than they can be bought.
WARNING: WE DON’T KNOW WHERE WE ARE ALLOWED TO SPOT WELD TO THE BOTTOM OF THIS CELL!
There are three (seemingly) laser weld lines near the outer rim of the bottom that internally connect the anode’s current collector plate to the metal can. I STRONGLY RECOMMEND NOT WELDING ON TOP OF THESE LINES. You could damage the internal welds. See the attached teardown photos of the bottom of this cell.
The center of the bottom has a slightly raised circular area that seems to not be touching anything internally. I do not know if this is where you can spot weld or not. There is no information about where it is okay to weld from Ampace or LT so you have to decide on your own where to weld if using these cells to create a battery pack.
Whatever this cell is, its performance is incredible. Some test results and comments….
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650 Ratings & Performance Table:
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21700 Ratings & Performance Table:
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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.
Test Results
The best performing power 18650 I’ve tested WHEN NEW. Cycle life and consistency haven’t been tested yet and both of those were problems with the LT-branded JP40’s (LT 22710A) along with some early cell failures (zero volts when received or quickly dropping to zero volts after a bit of use).
This appears to be the Ampace JP30, but not proven yet, in the original factory wrap but with the original printing washed off to varying degrees. On some of these wraps you can still see hints of “Ampace” printing. This washing/rebranding is what LT did with the JP40 too.
This LT 19660A cell is an incredible performer but we don’t know what grade they are (which affects out-of-box consistency and performance) and the JP30’s ratings are confusing. I strongly recommend testing these before committing to building large packs with them. Make sure you have a VERY good BMS installed too.
Just like with the JP40, I’m sure we’ll see other wrapped versions of the JP30 and then eventually original Ampace factory-wrapped cells that will have a better chance of being high grade. Right now I’m sure 100% of Ampace’s high grade cells are instantly being bought up and we’ll have to wait until a big customer sells off some excess inventory or Ampace can start making them faster than they can be bought.
WARNING: WE DON’T KNOW WHERE WE ARE ALLOWED TO SPOT WELD TO THE BOTTOM OF THIS CELL!
There are three (seemingly) laser weld lines near the outer rim of the bottom that internally connect the anode’s current collector plate to the metal can. I STRONGLY RECOMMEND NOT WELDING ON TOP OF THESE LINES. You could damage the internal welds. See the attached teardown photos of the bottom of this cell.
The center of the bottom has a slightly raised circular area that seems to not be touching anything internally. I do not know if this is where you can spot weld or not. There is no information about where it is okay to weld from Ampace or LT so you have to decide on your own where to weld if using these cells to create a battery pack.
Whatever this cell is, its performance is incredible. Some test results and comments….
- The model number has “19660” in it but it’s a normal sized 18650.
- Test these cells before using them at above the (lower) 30A continuous current rating of the JP30! We really don’t know anything about these cells and you use them at your own risk. I present my test results for informational purposes only.
- Two cells tested at 3029mAh and 3040mAh, very good consistency and a bit over the 3000mAh for the JP30.
- DC IR was 5.9mOhms and 6.4mOhms, okay consistency
- This cell outperforms all other 3000mAh 18650’s I’ve tested and even beats the 21700 Samsung 30T down to about 3.1V. Then the Samsung starts performing better.
- A May 2024 TDK/Ampace presentation document puts the continuous current rating for the JP30 at 30A. This might be for cycle life reasons. Ampace’s other marketing says the JP30 can be run continuously at 36A.
- Ampace mentions a noncontinuous current rating of 140A for 5 sec in their video ( ). It is possible (like it is with many cells) but there is HUGE voltage sag. And you will definitely be aging the cell faster and damaging it.
- Performance testing at 60A-100A and a “shootout” directly comparing this cell with other power cells at 40A have been done but the results are Patreon-only.
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.
