As you may or may not know, new Tesla/Panasonic Gigafactory-1 will start producing cells in a month or two, and when it comes to full capacity this single factory will produce as much cell capacity as the current worldwide production combined. As you also may or may not know, this new factory will produce cells in a new format: slightly larger 20700 instead of traditional 18650.
So, when are we going to see flashlights for the new 20700 cell type?
Any existing 18650 flashlights large enough to accept 20700 cell?
I have no doubt they will quickly find their way to the general public. Just like, for example, readily available Sony VTC6 cells did, despite Sonyâs vocal objections.
Single cell 26650 lights are too fat for my taste, but 20700 cell would not increase size by much compared to 18650. Since it would also add 30-35% capacity, personally I am looking forward to 20700 flashlights.
Iâll be curious as to how soon we see 20700 cells in hobbiestsâ hands. Based on the graphic a top-of-the-line 20700 cell could have up to 4200 mAh capacity. Are there any current 1 cell lights w/ enough âmeatâ in the battery tube to be bored out to 20 mm?
If a 26650 light is too fat for your taste, then your selection is going to be very limited indeed. However, any light that is made to take both 18650 and 3x AAA in a holder should be big enough. Otherwise, if you can find one thatâs made to take 18650, and has a thick tube, you could possibly bore it out for ~20mm cells yourself.
The volume of a 26650 cell is roughly TWICE the volume of an 18650 cell. And so could be the energy-content (roughly). But the energy-content of the best 26650 cellâs is not even 50% larger than that of an 18650 cell. The increase in capacity will only occur if everybody agrees 20700 is the new industry standard and everybody puts his shoulders to the wheel.
Did you miss the word Panasonic? Or the part which explains that this single factory will produce as much cell capacity as the current worldwide production combined?
No, we donât need everybody, just somebody. Panasonic already has high energy chemistry, so they could pull it off easily without anybody elseâs help. The reason none of the other size cells have as great energy density as 18650 isnât because there arenât enough people trying, itâs because there arenât the right people doing it. The big guys with all the best technology only make 18650 and 18500 (and soon 20700) cells. Thatâs how it works. Everybody else has inferior capacity, even in 18650 cells.
From my reading this new size battery is being designed for power packs for the automotive industry and especially Tesla who will have the worldâs largest battery manufacturing facility in Sparks, Nevada.
The flashlight industry is a very small user of either 18650 or 20700 batteries. The new battery for our needs is far off.
The new Tesla facility is surrounded in secrecy; the next five years should bring new advancements and hopefully oneâs that would even surprise many of us here on this forum.
It will be cool to see what happens, but I sure hope 20700 doesnât replace 18650 for the major manufacturers. I want better and better battery technology for the lights I already have. I donât want 90% of the lights I own to become outdated because you are stuck with old battery tech.
I donâ think that would happen, but you never know.
If capacity is all they were after, which I doubt since they'll also benefit from simplified manufacturing protocols, I'd have preferred to see them chosing the 26650 format. The reason I see here behind the 20700 format is that it's area/volume quotient (cooling, power delivery) is not so far off the 18650's one.
Tesla is spending craploads on R & D to increase the power of these cells. Given the rush to produce, they have most likely not incorporated even a part of the changes they are looking at in the lab into the finished product yet. Interesting times indeed, Iâm looking forward to it. Musk quoted about the speed improvements based on the new battery packs from yesterdays BBC article: the cars â⌠hailed the upgraded battery as a profound milestoneâŚ.will do 0-60mph in 2.5 secondsâ
Given the rush to production I think itâs possible weâll see availability within a year. Hard to say as none of us know the production details of the batteryâs. That means that 4-5 years might not be unreasonable either, but I doubt it will be that long. They have a bunch of pre-ordered cars they need to build first ASAP though.
A few years ago, I had read that Tesla would have chosen the 22650, to replace 18650. have changed their idea.
I like more the 22650 to replace the 18650; It is not fat like an 26650 and can reach (and archieve) good capacities âŚI think
It might not make sense in terms of capacity/cell but if the added capacity brings down the number needed then it makes sense, especially for vehicles using thousands of them. Then thereâs also the power wall technology that will demand a huge number of cells.