These tests below only note the ESTIMATED ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, LG, Panasonic, or Sanyo can change at any time! This is 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 personal injury or property damage. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition.
Testing batteries at their limits is dangerous and should never, ever, 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.
Bottom Line
This is the 21700 size version of the Sony VTC6A. It performed essentially identically to the Samsung 40T which was given an estimated rating of 25A/35A and 4000mAh by me.
The Samsung 40T delivered a tiny bit more energy, Wh, at high current levels but the 21700 VTC6A ran a tiny bit cooler. Basically, they perform the same and are a fantastic choice for use at up to 20A-25A, in regulated or unregulated devices. At above 20A-25A the Samsung 30T is the better choice though due to its higher current rating and better efficiency (lower internal resistance).
This cell now has a tiny QR code square on the bottom. Perhaps an anti-counterfeiting measure?
If you have a VTC6A 21700, or one of its rewraps, that does not have this QR code it is probably an earlier sample. I have not tested them and I do not know their true ratings.
The two cells I tested delivered 4107mAh and 4131mAh at 800mA (0.2C) down to 2.5V.
I do not have the datasheet for this cell. I am TENTATIVELY ESTIMATING this Sony’s ratings to be 30A continuous and 4000mAh rated/minimum, 4100mAh typical/nominal.
Two cells were donated for the purposes of testing by Vapcell (Vapcell batteries, chargers, vape batteries). Thank you!
Continuous Current Discharge Graphs
Ratings Graphic
Performance Specs
- DC Internal Resistance = 13.6mOhms (milliohms) average for the two cells.
- Total energy delivered down to 3.2V at 10A continuous = 11.0Wh (Watt-hours) average
- Total energy delivered down to 3.2V at 20A continuous = 9.8Wh (Watt-hours) average
- Total energy delivered down to 3.2V at 30A continuous = 8.3Wh (Watt-hours) average
I want to work for the vaping 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 and testing news and a say in what I test then please consider becoming a patron and supporting my testing efforts: Battery Mooch is creating battery tests and educating vapers | Patreon.
To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of personal injury or property damage. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition.
Testing batteries at their limits is dangerous and should never, ever, 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.
Bottom Line
This is the 21700 size version of the Sony VTC6A. It performed essentially identically to the Samsung 40T which was given an estimated rating of 25A/35A and 4000mAh by me.
The Samsung 40T delivered a tiny bit more energy, Wh, at high current levels but the 21700 VTC6A ran a tiny bit cooler. Basically, they perform the same and are a fantastic choice for use at up to 20A-25A, in regulated or unregulated devices. At above 20A-25A the Samsung 30T is the better choice though due to its higher current rating and better efficiency (lower internal resistance).
This cell now has a tiny QR code square on the bottom. Perhaps an anti-counterfeiting measure?
If you have a VTC6A 21700, or one of its rewraps, that does not have this QR code it is probably an earlier sample. I have not tested them and I do not know their true ratings.
The two cells I tested delivered 4107mAh and 4131mAh at 800mA (0.2C) down to 2.5V.
I do not have the datasheet for this cell. I am TENTATIVELY ESTIMATING this Sony’s ratings to be 30A continuous and 4000mAh rated/minimum, 4100mAh typical/nominal.
Two cells were donated for the purposes of testing by Vapcell (Vapcell batteries, chargers, vape batteries). Thank you!
Continuous Current Discharge Graphs
Ratings Graphic
Performance Specs
- DC Internal Resistance = 13.6mOhms (milliohms) average for the two cells.
- Total energy delivered down to 3.2V at 10A continuous = 11.0Wh (Watt-hours) average
- Total energy delivered down to 3.2V at 20A continuous = 9.8Wh (Watt-hours) average
- Total energy delivered down to 3.2V at 30A continuous = 8.3Wh (Watt-hours) average
I want to work for the vaping 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 and testing news and a say in what I test then please consider becoming a patron and supporting my testing efforts: Battery Mooch is creating battery tests and educating vapers | Patreon.
To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
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