4 ms·

We allready got them. LiFePO4.

• kalleboo 2y ago
  Do they match Li-ion in energy density yet? Especially for things like the earbuds in the OP, high energy density is critical.
  • rightbyte 2y ago
    No. But I mean it is like half the energy density, not a tenth. And a nice LiFePo4 cell can match a cheap Li-ion. Maybe better cycle performance somewhat outweights the initial smaller energy too?
    • kalleboo 2y ago
      For many users (and for the environment), I'm sure it would, sadly these things get sold on headline numbers like "smallest/lightest yet" and "longest battery life" so a product focusing on that would end up failing in the market