Counterfeit Canon batteries warning

Canon announced the findings on counterfeit camera batteries (lithium ion)circulating in auction websites, the danger of using this batteries is that they don't have the needed protective circuitry to avoid fire or explosion due to overheat -they report an explosion already- to know how to differentiate the originals from the counterfeit check Canon's site for more info tinyurl.com/tpzdf -used tinyurl to avoid the link getting eaten by the emoticons-

Personal note:
Being that Lithium Ion batteries are something that if badly manufactured are dangerous -Sony exploding laptop batteries issue- I recommend that if you buy batteries do it from an authorized dealer and if you are going to buy a third party one at least do a check on the net to see if they are safe.