condition: excellent make / manufacturer: Canon model name / number: CP-E4
QR Code Link to This Post
Canon CP-E4 Flash Compact Battery Pack
Ended up not using this more than a few times, however when needed, it helps fire the flash continously, with dramatically reduced recycle time. Works great with Canon 600EX-RT/2, 580EX/2, 550EX, 540EZ, 430EZ, MT-24EX and MR-14EX.