What I think I see, is half the tube has a fresh crack, shiny metal. The other half looks less shiny, like it was cracked a long time. Reeks of a factory defect from the appearance in the pic.
But I could just be seeing a shadow in the pic.
Thanks for showing it.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.