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power density

  1. What type of DIY homemade rechargeable battery or fuel cell would you recommend to power an electric car?

    Batteries and Charging
    I'm planning to build myself an electric car. Due to the cost of Li-ion batteries, i would like to build myself a hi-density rechargeable, battery or fuel cell. So far, i have read about carbon based battery, salt, direct methanol fuel cell etc... which one would you recommend ?
  2. Lead's not dead: Design News article

    EV News
    I just found this article from Design News about an improvement in Lead-Acid cells for a much higher power density (not energy density), and longer life, at lower cost: There was also a recent article about Li-Ion cells used in...