Product Advisory: To Users of Canon Speedlite and Macrolite Products and Accessories. Notification Regarding Use of (AA/R6) Lithium Batteries
AA/R6 Lithium batteries cannot be used with any Speedlite or Macrolite products and compact battery packs including those listed at http://canoncanada.custhelp.com/app/answers/detail/a_id/49282 because certain AA/R6 lithium batteries, in rare cases, may become extremely hot during usage in such products.
Contact Information for Inquiries
Canon Customer Information Centre
Email: Please go to http://canoncanada.custhelp.com/app/utils/login_form/redirect/ask .
For additional support options: http://canoncanada.custhelp.com/ .