Bench Test Results: Samsung 50GB - 9.8A 5000mAh 21700
- By Mooch
- Batteries and Chargers
- 0 Replies
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, 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
A decent performer, it’s essentially equal to the Samsung 50G and 50E2 and like the other high-capacity cells it’s best at about 5A (15W) or lower. Some other cells perform a bit better, some a bit worse, check my Ratings & Performance table to see which.
The datasheet doesn’t list a continuous current rating but discharges at 9.8Α are mentioned and that seems reasonable. The datasheet mentions that for the rated cycle life you should stay at or below 5A though and limit the cell’s voltage range to 3.0V to 4.125V. Other ultra-high capacity cells do this too.
Some thoughts and observations…
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.
To see how other cells have tested check out this link: Links To All 21700, 26650, 18350, 18500 Battery Tests
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, 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
A decent performer, it’s essentially equal to the Samsung 50G and 50E2 and like the other high-capacity cells it’s best at about 5A (15W) or lower. Some other cells perform a bit better, some a bit worse, check my Ratings & Performance table to see which.
The datasheet doesn’t list a continuous current rating but discharges at 9.8Α are mentioned and that seems reasonable. The datasheet mentions that for the rated cycle life you should stay at or below 5A though and limit the cell’s voltage range to 3.0V to 4.125V. Other ultra-high capacity cells do this too.
Some thoughts and observations…
- Rumor is that this cell is the EV version of the Samsung 50G, adding a bottom vent (“B” for Bottom?) for additional safety, see above photo. Bottom vents are used in some very high capacity cells to give escaping gases another way out in case the cell goes into thermal runaway and the top vent gets blocked. If this happens the cell could burst without the bottom vent.
- The top contact of this vent is tiny and thin, see above photo. I recommend not using this cell if your device places a lot of pressure on the top and bottom contact. I also recommend not using this cell if you would be covering the bottom contact with a metal sheet (typically nickel or copper) to connect the cells within a battery pack. This would block the bottom vent.
- DC IR measured 16.2mOhms and 16.7mOhms for two cells. This is decent consistency.
- Capacities were 5074mAh and 5101mAh. This isn’t great consistency but it’s above the cell’s 5000mAh rating.
- The standard charge rating is 1.6A and fast charging is only 4.9A. I recommend staying at 1.5A or lower for long cell 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...

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...

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.
To see how other cells have tested check out this link: Links To All 21700, 26650, 18350, 18500 Battery Tests