Tesla's new 4680 - We're gonna need a bigger flashlight

This cell sounds like a nice upgrade for the BLF LT1 lantern :slight_smile:

One 46800 should give the LT1 70% extra runtime, based on the Tesla plan. Even if Tesla falls a bit short, 50% extra runtime should still be within easy reach.

I’m beginning to wonder whether a mainstream charger manufacturer might make the jump to having a common charging module for the electronics and the controls, with plug-in cell holders in a range of sizes, like people already do with hobby chargers. New cell size? Sell a new cell holder, no charger redesign required.

Wait… 300W from a single cell? 35000 lumen soda can lights incoming.

Who’s going to do the first LT1 mod? (I’m not… not that skilled).

People used to make adapters for SLR camera bodies to allow using lenses from other manufacturers.
simple flat rings with each side configured for one brand’s bayonet or thread connection.

It ought to be possible to make new size battery tubes along with adapters for currently existing flashlight heads.

Circle-packing of 4×18mm = 44mm.

46mm is 3mm extra width, about the height of 3 stacked dimes.

But now you don’t need springs to accommodate 4 possibly variable-length cells (sort unprotected vs long protected), but can use a bunch of shallow domes or a big fat metal “leaf” to allow only a few mm of slop to make good solid contact.

I’d say it could probably drop into a Q8 right now by just boring it out and modding the bottom-inside of the tube.

I want one.

Yeh, and the cells inside the Q8 aren’t snug together, but flop around in their respective holes, so the big donk could just drop right in.

TeslaFire cells, 99000000mAH, of course.

These batteries make no sense in flashlights.
You don’t understand that the 40-50% increase in capacity and power is only noticeable in Tesla cars? Actually the larger the cell, the higher the car range will be. 4680 is not an ideal size. It’s just the maximum cell size they currently are able to produce.
But in a flashlight there wouldn’t be any difference between 5x18650 and 1x4680.

But it should fit (more or less) into the space of 4×18650.

As Lightbringer points out it would fit in a 4x18650 space…
and fill the voids around the cells, providing more energy in the same volume - and eventually more available power/current.

Some prefer 8x18650 lights to 4x18650 because of ergonomy.
But others prefer it because of increased runtime.
Tell them that they’d be better off with 18650.

I cant seem to find any info on weight of a 4680
looks to me like a lot of copper

must weigh a ton!!!

They claim the power/weight ratio is better than a tabbed cell.

Tesla 2170s are 250-260Wh/kg.

Back in August Musk tweeted that useful 400Wh/kg batteries are 3 or 4 years away.

That gives an upper and lower bound for the weight.

cool
this is the long lost single-A battery
the A cell!!

Cool - that vintage battery would be ideal for electronic tail switches!

The press reports I read didn’t watch or didn’t understand the presentation. The form factor and tabless design are only part of what they are attempting. and they didn’t show the secret sauce…

It is pretty easy to connect the dots:

Model S Plaid 0-60 < 2.0 Seconds Top Speed 200mph. Estimated Range 520 miles.

Protoypes of the new battery are already in test vehicles. Musk says the prototypes are easy compared to bringing this to volume production.

There’s no way to install part of a 4680 backwards and ruin your flashlight, like you can with 4x 18650, so that’s a win. Just need reverse polarity protection, and that’s easy to do.

I guess if you’re happy with all your 5x18650 flashlights, feel free to not buy any 4680 lights. But I do hope they catch on with the big LiIon manufacturers and make their way to flashlights. With a new 4680 version, I would buy a new Q8, FT03 and D4s (at least).

Is someone starting a group buy? I’m in for 8 units. :innocent:

Depending on price, I’d probably take 2. Hell, if I had to take a rasp to make the inside of a Q8 tube round, I’d do it. And those springs can be replaced or at worst cut down.

Went to bed dreaming/designing 2S 4680 driving XHP 70.2 into overdrive.

BIG light!

edit: After some analysis, better to use 8.4 Volts to overdrive the nominal 6V 70.2