<H1>Canon USA Warns On Lithium Batteries In Speedlites</H1>

Canon Speedlite 600 EX-RT

Canon USA has issued a warning against using AA Lithium batteries in any Speedlite or Macrolite products and compact battery packs, including those listed below because certain AA lithium batteries may become extremely hot during usage.

I must say this is rather bizarre because I have been using Lithium batteries in my Canon Speedlites for years and never encountered any problem. It must be on the advice of their lawyers to cover all the bases, just in case of some very rare occurrence.

Canon Products

• Speedlite 220EX
• Speedlite 270EX
• Speedlite 270EX II
• Speedlite 320EX
• Speedlite 380EX
• Speedlite 420EX
• Speedlite 430EX
• Speedlite 430EX II
• Speedlite 540EZ
• Speedlite 550EX
• Speedlite 580EX
• Speedlite 580EX II
• Speedlite 600EX
• Speedlite 600EX-RT
• Macro Ring Lite MR-14EX
• Macro Ring Lite MR-14EX II
• Macro Twin Lite MT-24EX
• Compact Battery Pack CP-E2
• Compact Battery Pack CP-E3
• Compact Battery Pack CP-E4