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, Murata, LG, Panasonic, Molicel, 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 physically and electrically protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition. Use of any of these batteries is AT YOUR OWN RISK.
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.
Test Results
This is a great performing, ultra-high capacity 26800 size cell. Why test such a large cell? I was curious about it and other sizes like 20700 and 21700 weren’t used until manufacturers decided to support those sizes. I always like to see what is available in different sizes in case there are great performing cells out there we’re not using right now. This is one of them.
If more 26800’s become available then the larger manufacturers might be willing to make the investment and create 26800 devices. Or a smaller company could 3D print some 26800 battery sleds and create a device using these cells for a relatively small investment.
The QB26800 is 26mm in diameter and 80mm long, weighing about 121gms. Think of it as a long 26650.
It is rated at 3C (20.4A) continuous by the manufacturer. There is a 5C (34A) “max pulse discharge current” rating for 30 seconds but that could be for just a single pulse so we cannot use that as some sort of “pulse” rating.
This cell performed pretty well at 20A, staying at a decent temperature and without a lot of voltage sag, so the manufacturer’s rating of 20.4A sounds reasonable.
This is a great cell for low to moderate power levels, up to 60W or so, beating the best high-capacity cells in other sizes. The QB26800 outperformed the Vapcell Red 20A 5500mAh 26650, delivering 15.5Wh of energy at 15A down to 3.2V versus 12.8Wh for the Vapcell 26650. The great performing (5000mAh) Vapcell G50 21700 only delivered 10.2Wh of energy.
The capacity of the two cells I tested was 7177mAh and 7203mAh. This is decent consistency for cells from a China manufacturer and they significantly exceeded their 6800mAh rating. This kind of underrating rarely happens and I am wondering if there is either a large inconsistency between batches (or within a batch) or this cell has had its chemistry adjusted or might do so in the future. I am rating them at the manufacturer’s rating of 6800mAh.
Two cells were donated for the purposes of testing by Oskar Triebe. Thank you!
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
QB26800 Datasheet Specs
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, battery and charger testing and 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 physically and electrically protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition. Use of any of these batteries is AT YOUR OWN RISK.
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.
Test Results
This is a great performing, ultra-high capacity 26800 size cell. Why test such a large cell? I was curious about it and other sizes like 20700 and 21700 weren’t used until manufacturers decided to support those sizes. I always like to see what is available in different sizes in case there are great performing cells out there we’re not using right now. This is one of them.
If more 26800’s become available then the larger manufacturers might be willing to make the investment and create 26800 devices. Or a smaller company could 3D print some 26800 battery sleds and create a device using these cells for a relatively small investment.
The QB26800 is 26mm in diameter and 80mm long, weighing about 121gms. Think of it as a long 26650.
It is rated at 3C (20.4A) continuous by the manufacturer. There is a 5C (34A) “max pulse discharge current” rating for 30 seconds but that could be for just a single pulse so we cannot use that as some sort of “pulse” rating.
This cell performed pretty well at 20A, staying at a decent temperature and without a lot of voltage sag, so the manufacturer’s rating of 20.4A sounds reasonable.
This is a great cell for low to moderate power levels, up to 60W or so, beating the best high-capacity cells in other sizes. The QB26800 outperformed the Vapcell Red 20A 5500mAh 26650, delivering 15.5Wh of energy at 15A down to 3.2V versus 12.8Wh for the Vapcell 26650. The great performing (5000mAh) Vapcell G50 21700 only delivered 10.2Wh of energy.
The capacity of the two cells I tested was 7177mAh and 7203mAh. This is decent consistency for cells from a China manufacturer and they significantly exceeded their 6800mAh rating. This kind of underrating rarely happens and I am wondering if there is either a large inconsistency between batches (or within a batch) or this cell has had its chemistry adjusted or might do so in the future. I am rating them at the manufacturer’s rating of 6800mAh.
Two cells were donated for the purposes of testing by Oskar Triebe. Thank you!
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
QB26800 Datasheet Specs
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, battery and charger testing and 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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