5 Matching Annotations
  1. Sep 2019
    1. What killed the electric scooter back then is the same thing that killed the electric car of year 2000: terrible lead-acid battery technology

      Lithium Ion batteries matured and saved the electric scooters and cars market. Back then in the year 2000, lean-acid battery was too immature

  2. Sep 2017
    1. tried to test some AA batteries. is 1.3 good? the lights didn't light up. Are the batteries on the meter low?

  3. Jun 2017
    1. series of small, powerful and inexpensive paper-based “BioBatteries” that developed from a simple origami shape in the lab of Assistant Professor Seokheun “Sean” Choi, PhD—and run on bacteria found in a few drops of dirty water—could transform point-of-care diagnostic testing in remote locations across the globe where medical resources are scarce

      Cool!

  4. Feb 2017
    1. A) Lithium-ion cells used in cars aren’t especially hazardous and are classified as landfill safe, B) They’re almost all recycled anyway

      Great to know that! I've heard the myth multiple times but never found out if it was true or not (didn't search for a long time though). Links to sources would be appreciated.