The Canon Compact Battery Pack CP-E4uses 8 AA batteries to improve flash recycle time during continuous shooting, manage heat output, and extend shooting time before needing to recharge or replace batteries. A carrying case is included that can strap to a case or belt for portability.

Compatible Canon Speedlite Flash Units:

• Macro Ring Lite MR-14EX II
• Speedlite 600EX-RT
• Speedlite 580EX II