Silicon anodes
On sale
- What happened
The Whoop 4.0 fitness tracker went on sale as the first product with Sila's silicon anode material, which raised its battery's energy density by about 17%.
- Why it matters
Phones get bigger batteries in the same space: silicon-carbon anodes give roughly 10% to 20% more energy, depending on how much silicon they hold.
Android Authority, 19 Mar 2025- How far from your life
Everyday life
Silicon-carbon battery anodes is on step 5 of 5. It is probably already in your life.
- Source
“increased the energy density in the fitness tracker's battery by around 17%.”MIT Technology Review, 8 Sept 2021
The bigger picture
More on Silicon anodes
On step 5 of 5: Everyday life. Everything we track on it
- Production
Sila started operations at its silicon anode plant in Moses Lake, Washington, built for car batteries: 2 to 5 GWh of capacity at first.
Evertiq, 24 Sept 2025 - Widely used
Silicon-carbon batteries had spread to many flagship phones, including the OnePlus 13, Honor Magic 7 Pro, OPPO Find X8 and vivo X200 series. Apple, Google and Samsung had not adopted them yet.
Android Authority, 19 Mar 2025