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
Why test 18350’s? I get a lot of requests for this as many vapers still use them.
Why test a cell from a company with such a terrible reputation? We always have new vapers joining our community and they might not know about the reputations that UltraFire and TrustFire have.
This UltraFire is a useless cell.
Its voltage immediately collapsed at only 5A and the two cells I tested only delivered 728mAh and 750mAh for a 240mAh (0.2C) discharge down to 2.5V. Its internal resistance is astoundingly high, causing huge amounts of voltage sag.
I am estimating this cell’s ratings at 2A and 700mAh. Current ratings for high internal resistance batteries like these are a combination of the temperature the battery runs at and how badly the voltage sags, i.e., its Wh specs.
Two cells were purchased for the purposes of testing by me.
Continuous Current Discharge Graph
Ratings Graphic
Performance Specs
- DC Internal Resistance = 140.7mOhms (milliohms) average for the two cells.
- Total energy delivered down to 3.2V at 5A continuous = 0.004Wh (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
Why test 18350’s? I get a lot of requests for this as many vapers still use them.
Why test a cell from a company with such a terrible reputation? We always have new vapers joining our community and they might not know about the reputations that UltraFire and TrustFire have.
This UltraFire is a useless cell.
Its voltage immediately collapsed at only 5A and the two cells I tested only delivered 728mAh and 750mAh for a 240mAh (0.2C) discharge down to 2.5V. Its internal resistance is astoundingly high, causing huge amounts of voltage sag.
I am estimating this cell’s ratings at 2A and 700mAh. Current ratings for high internal resistance batteries like these are a combination of the temperature the battery runs at and how badly the voltage sags, i.e., its Wh specs.
Two cells were purchased for the purposes of testing by me.
Continuous Current Discharge Graph
Ratings Graphic
Performance Specs
- DC Internal Resistance = 140.7mOhms (milliohms) average for the two cells.
- Total energy delivered down to 3.2V at 5A continuous = 0.004Wh (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