speedlite dead batteries then error 99

Discussion in 'Canon EOS' started by kraig_cuddeford, Jan 7, 2005.

  1. I guess the speedlite has NO battery indicator, E-TTL output changes
    the charge time so I cant use the charge time as indicator of battery
    life. . I get Error 99 when the flash batteries DIE so I need to know
    Whats the common practice for changing/recharging the flash batteries
    other than charge time or the green n red light.
  2. Roger G

    Roger G Roger G

    Kraig, I use NiMH in my 550EX. I keep a fully charged set in reserve and put them in when it's convenient. I've never had the batteries in use become fully discharged. I get excellent battery life, especially with the higher capacity bateries ie 2,000 mAH or more. NiMH batteries are not harmed by charging them before they are fully discharged. Hope this helps. Roger.
  3. Thanks Roger.

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