08-13-2010, 07:19 PM
I don't know if it is a design flaw, but the Canon MR-14EX Macro Ring Flash is a battery vampire. Sucks the life blood out of any batteries left in it overnight. Now why don't flash designers include some simple circuitry to cut battery power loss when the flash is switched off? [I don't have this problem with my other Canon flashes.]
Scott
Scott