Portable Flashlight

How do I open this flashlight to install its batteries?
I recently purchased an Energizer Hard Case Inspection Light (TUFPL22PE)–a very cool, portable flashlight–and, for the life of me, I can’t figure out how to open the durned thing to install its batteries. There appears to be a cap on its butt-end, but I don’t know if I should squeeze it, twist it, turn it, pry it, or what. And I don’t want to force any of the above in fear that I might snap it off.
There are no instructions on the packing material, the flashlight itself, or the Energizer web site. And an additional web search has been fruitless. I have uploaded a question to the Energizer people, but who knows if I’ll get an answer.
Any clues?
Take it back to the store from which it was purchased and let them tell you. If they can’t, then tell them that it fails the implied warranty test and you want it replaced.
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