Bench Test Results: Vapcell Blue K28 - 20A 2800mAh 18650...decent performer, exaggerated capacity

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  • May 13, 2015
      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.

      300E366E-06C4-415D-9AC3-7F20DADA8745.jpeg 20EC5ADE-9462-46F0-93FA-E3CDB2E77237.jpeg AF0D7A55-5146-4E03-AE16-079DD2E9982F.jpeg A2054956-F20F-45C8-A061-2B2239536577.jpeg

      Test Results
      This cell is a decent performer but its capacity rating is slightly exaggerated, something often done by Vapcell.

      It has a lot more voltage sag than the 30Q and VTC6 at the start of a 20A (60W) discharge but once it warms up it performs essentially the same down to about 3.1V. Below that voltage this cell can’t compete with the higher capacity 30Q and VTC6.

      The two cells I tested delivered 2764mAh and 2779mAh. This is decent consistency but these cells fail to meet Vapcell’s 2800mAh rating. Since the two cells I have cannot be the lowest capacity ones in the batch I am rating the K28 at 2700mAh.

      The Vapcell K28 ran slightly cooler than the Samsung 30Q and this cell’s 20A rating seems reasonable. If you can find it for less than what the 30Q and VTC6 cost you might consider giving it a try.

      Two cells were donated for the purposes of testing by Vapcell (Vapcell batteries, chargers, vape batteries). Thank you!

      Continuous Current Discharge Graphs
      15F56866-6E23-4FB3-8D84-C9313856E55D.jpeg B4AC66DD-F845-413C-8EE4-38A916280D98.jpeg

      Ratings and Performance Specs Graphic

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      To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
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