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.
Test Results
It’s been a couple of years since I last tested the Samsung 50S. This next version, the 50S2, did well. It ran for a touch longer than the 50S at 5A and 25A while running 4°C-7°C cooler. You won’t see any difference in your actual run time unless you’re running down to below about 3.0V-3.1V though and even then it might not be noticeable.
The 50S2 is a great performing “all purpose” 21700. Only a few cells are better at very low or very high power levels and the 50S2 is a good choice for 5A/15W up to 25A/75W or so.
The 50S2 ran a touch hot IMO for its 25A rating but it’s several degrees cooler than the 50S and its datasheet rating seems fair. You can run them at up to their 45A “temperature-limited” rating as long as you don’t let them get hotter than 80°C (which is HOT).
Some other results and info…
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650 Ratings & Performance Table:
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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 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
It’s been a couple of years since I last tested the Samsung 50S. This next version, the 50S2, did well. It ran for a touch longer than the 50S at 5A and 25A while running 4°C-7°C cooler. You won’t see any difference in your actual run time unless you’re running down to below about 3.0V-3.1V though and even then it might not be noticeable.
The 50S2 is a great performing “all purpose” 21700. Only a few cells are better at very low or very high power levels and the 50S2 is a good choice for 5A/15W up to 25A/75W or so.
The 50S2 ran a touch hot IMO for its 25A rating but it’s several degrees cooler than the 50S and its datasheet rating seems fair. You can run them at up to their 45A “temperature-limited” rating as long as you don’t let them get hotter than 80°C (which is HOT).
Some other results and info…
- The 50S2 can be identified by a “2” in the lower left corner of the printing on the wrap. If it’s not there then it’s the original 50S.
- The 50S2 also has two laser-etched codes on the bottom. For the three different batches I’ve seen there is an “A” above a six-digit number.
- We cannot assume the “A” is the grade! In fact, one of the batches I tested (P85T) had the “A” but performed noticeably worse at higher current levels than the OH1T batch cells I tested for this report. The P85T batch cells I had were, IMO, a lower grade.
- This does NOT mean all 50S2 cells with the P85T batch/date code are a lower grade! Any batch can have different grade cells. Unfortunately, there’s no way to know the performance of any particular cell without testing it.
- DC IR measured 12.9mOhms and 13.8mOhms. This isn’t great consistency for a Samsung but is not a concern.
- Capacities for the two cells was 5111mAh and 5143mAh. This is also not great consistency but is well above the 5000mAh typical capacity rating…which it should be IMO.
- The standard charge rate is 2.5A and the maximum rate is 6A. Like all cells I’m sure that the cycle life will be shorter if charging at the max rate a lot.
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.
