Bench Test Results: EVE 33V (with CCC logo) - 10A 3200mAh 18650
- By Mooch
- Batteries and Chargers
- 0 Replies
These tests only note my personal ESTIMATED ratings for these batteries at the time I tested them. Any battery that is “rewrapped” (not in its original factory wrap) can change at any time! This is one of the hazards of using these batteries 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
I tested this cell 3-1/2 years ago and it did well. These CCC-logo*** 33V’s did even a little bit better.
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650/21700 Ratings & E-Scores and Recommended Batteries Tables:
The links are in my public Patreon pinned post: https://www.patreon.com/posts/pinned-post-137974946
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
I tested this cell 3-1/2 years ago and it did well. These CCC-logo*** 33V’s did even a little bit better.
- There was a small increase in run time and energy delivered (Wh). Not a lot but it’s great to see that cell performance has improved.
- Like all 10A-rated high capacity cells its (relatively) high internal resistance keeps it from being efficient at its rating since there is a decent amount of voltage sag when being run that hard.
- Performs a touch better than the Sinowatt 35HP, about the same as the Murata VTC6, and almost as good as the Molicel M35A.
- The Vapcell N40/N41 (when I tested them) are still the best performing 18650’s at up to 10A but this cell should cost less.
- In my testing the EVE 33V cell reached a max temperature of 61°C down to 2.8V at 10A. This would make the cell reach about 64°C down to 2.5V, which is above its 60°C limit. It’s close enough though that the 10A rating from EVE seems reasonable.
- The two cells I just tested delivered 3080mAh and 3082mAh, extraordinary consistency. But I can’t have the lowest capacity cells in the batch and this is below the 3100mAh minimum rating. I’m rating them at 3000mAh.
- BUT THE CAPACITY SPEC DOESN’T MATTER! Even with this lower capacity these cells ran for a little longer and at a slightly higher voltage than the 3200mAh 33V’s I tested earlier. EVE has improved the performance of this cell over time and that helps it hold its voltage up for longer.
- There’s a chance that the cells I tested were a slightly lower grade so the capacity was a little low and the max temperature a little high in my testing. I’m not at all concerned because they still performed better than the 33V’s I tested earlier.
- The DC internal resistance (IR) was 34.2mOhms and 34.3mOhms, also extraordinary consistency. The China cells have been getting better and better with this.
- The standard charge rate is 1.55A and the max is 3.1A. For long cell life I recommend staying at/under 1.5A.
- The 33V is usually available at a lower cost and that makes it a great cell to consider for use at up to 5A-7A or so (like most of the over-3000mAh 18650’s), especially for larger packs where cell cost is critical.
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650/21700 Ratings & E-Scores and Recommended Batteries Tables:
The links are in my public Patreon pinned post: https://www.patreon.com/posts/pinned-post-137974946
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.
