Bench Test Results: “Tesla NCR18650T1”- 10A 3400mAh 18650…best performing over-3000mAh 18650

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Electron Wrangler
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May 13, 2015
These tests below only note my personal ESTIMATED ratings for the batteries I tested 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 property damage, personal injury, or even death. They are not supposed to be used outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous current rating and keep the plastic wrap and top insulating ring in perfect condition.

Testing batteries at their limits is dangerous and should never 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.

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Test Results
Vapcell sent these in a generic wrap and calls them “Tesla NCR18650T1”, giving them a 10A 3400mAh rating. I do not know if that model number is accurate or if these cells are used in Teslas.

These cells are the best performing over-3000mAh cells I have tested, beating both the Sanyo NCR18650GA and Molicel M35A (by just a little) and the LG MJ1 (by a lot). I was hoping they would be great cells as they use much newer tech than those other top performers.

This cell features a bottom vent (in addition to the standard top vent) and has the same three-stripe bottom spot-weld mark that the Tesla 21700 does. I recommend not blocking, pressing on hard, or spot welding onto the bottom venting ring.

DO NOT ASSUME THAT ALL 18650’S WITH THESE THREE BOTTOM STRIPES ARE THIS CELL! You’ll need to examine them carefully with a magnifier, comparing them to these cells, and then test them to make sure they are the same.

The two cells I tested delivered 3485mAh and 3504mAh, meeting Vapcell’s 3400mAh rating.

There are no datasheets available AFAIK and I don’t know this cell’s true ratings but 10Α and 3400mAh seems reasonable. Like any Li-Ion round cell, you use this cell at your own risk.

My standard recommendation for any ultra-high capacity (over 3000mAh) 18650 is to not go over about 5A-7A if you want to use the extra capacity it offers. Much higher than that and the voltage sag will cause much shorter run time and “waste” that extra capacity.

Vapcell donated these cells for testing so contact them if you are interested ( Vapcell uses ”NCR18650T1” as the model number. I don’t know if any vendors have them in stock.

Continuous Current Discharge Graphs
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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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