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.
Ratings graphic: https://imgur.com/a/2o3wcPY
Test report: https://bit.ly/2OnqlGH
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: https://www.patreon.com/batterymooch
These tests 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” batteries 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 continuous current rating and keep the plastic wrap and top insulating ring in perfect condition.
Any rating in my ratings tables can change at any time as different grade cells appear on the market, we get swamped with fakes, or new information becomes available to me. Please, never assume that the ratings in the tables are permanent and will never change! Always download the latest version before considering any cell purchase.
To see how other cells have tested check out this link: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/
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