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Charge rate question

  1. Jun 14, 2010 #1
    hi, can anyone explain to me what does it mean when you say "charging at a rate of 0.1C"

    what does C means? are you charging at a rate of 0.1 coulomb per second?
  2. jcsd
  3. Jun 14, 2010 #2


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    Google is our friend:

    Put another way on the 6th link:

    So charging at 0.1C would fully charge a dead battery in 10 hours.

    Charging at 1C would fully charge a dead battery in 1 hours.

    Mathematically: 1/(xC) = hours to charge a dead battery.
    Last edited by a moderator: May 4, 2017
  4. Jun 14, 2010 #3


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    You need to remember that you can't take this to extremes. Charging at 100C, in 36s will harm the battery in many cases.
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