Michael Guilfoy

Making batteries. Austin, TX living. St Louis born and bred.

[Michael Guilfoy @MichaelGuilfoy]

As Tesla announced yesterday…congrats to the entire 4680 Cell Manufacturing team on solving a super hard problem with dry cathode battery electrode! Huge milestone to deliver dry cathode into mass-production and have started customer deliveries last year.

2026 will be a new era for 4680 as we continue Cybertruck, restart 4680 Model Y’s, and start CyberCab + Semi production.

[Elon Musk @elonmusk]

Cybercab with no steering wheel or pedals driving around Austin

[Michael Guilfoy @MichaelGuilfoy]

@JoeTegtmeyer We’re supporting 4 great products out of GFTX - Cybertruck, Model Y, CyberCab, and Tesla Semi! Lots of cells!

[Sawyer Merritt @SawyerMerritt]

Updated valuations of Elon Musk's companies based on publicly available info:

• SpaceX: $2.1 trillion
• Tesla: $1.5 trillion
• Neuralink: $9 billion
• The Boring Company: $7 billion

$3.62 trillion combined. Elon has now created $2.5 trillion in wealth for others.

[André Thierig @AndrThie]

Today, we announced a $ 250m investment for our Giga Berlin Cell factory. This will enable 18GWh of annual 4680 cell production and create more than 1500 new jobs. Good news during challenging times for the German industry.

[Tesla Semi @tesla_semi]

WattEV to order 370 Tesla Semis

[Michael Guilfoy @MichaelGuilfoy]

Congrats to the entire Tesla team on this milestone! Our second new vehicle platform launched this year utilizing our 4680 battery cells!

2026 will be a year of massive cell production growth.

[Tesla Semi @tesla_semi]

First Semi off high volume line

[Michael Guilfoy @MichaelGuilfoy]

@tesla_semi Congrats to the @tesla_semi team! Powered by 4680 cells!

[Tesla Robotaxi @robotaxi]

Robotaxi now rolling out in Dallas & Houston 🤠

[Tesla North America @tesla_na]

Our Lithium Refinery is designed to have a much lower carbon footprint than traditional hard rock refineries

– Acid-free refining helps produce a safe coproduct
– Water is recycled throughout production, with every drop treated & cleaned on site
– Designed to close the loop for lithium in our battery supply chain

[Michael Guilfoy @MichaelGuilfoy]

4680 Cell Manufacturing team is the best and will drive huge growth this year! 2026 will be quite exciting

[Elon Musk @elonmusk]

Tesla battery cell production is getting good

[Whole Mars Catalog @wholemars]

Cybertruck standard is brought to you by the 4680 cell

[Cybertruck @cybertruck]

New version of Cybertruck now available to order in the US

This is our most affordable Cybertruck yet.

Tough as nails with ultra-low cost of ownership

– Starts at $59,990
– Dual Motor AWD w/ est. 325 mi of range
– Powered tonneau cover
– Bed outlets (2x 120V + 1x 240V) & Powershare capability
– Coil springs w/ adaptive damping
– Heated first-row seats w/ textile material that is easy to clean

Also
– Steer-by-wire & Four Wheel Steering
– 6’ x 4’ composite bed
– Towing capacity of up to 7,500 lbs
– Powered frunk

Order via https://t.co/b3WNPzYJYj

[Michael Guilfoy @MichaelGuilfoy]

Powered by 4680 cells!

[Tesla @Tesla]

First Cybercab off the production line at Giga Texas

[Herbert Ong @herbertong]

Elon just confirmed that @Tesla has solved dry electrode manufacturing.

When Elon calls something “incredibly difficult,” that’s a big deal.

This is one of those quiet breakthroughs that can change battery cost, scale, and margins. $TSLA

[Tesla @Tesla]

😃

[Bonne Eggleston @BonneEggleston]

Huge achievement from an incredible team to bring up a new, and better lithium refinery from scratch in such a short time. Hats off!

[Elon Musk @elonmusk]

Tesla Model Y is now officially the world’s best-selling car for the third year in a row!

[Tesla Asia @Tesla_Asia]

Our 9 millionth vehicle globally has just rolled off the production line at Giga Shanghai 🎉
Thanks to our owners and supporters around the world ❤️

[Michael Guilfoy @MichaelGuilfoy]

@AndrThie Excited to work with your team @AndrThie on bringing 4680 to volume production at Giga Berlin!