LZ A7 Specification Question

Hello HiFiers.

I have a question, regarding the specifications for the LZ A7. According to the material included with the iem, and what I can find online, the impedance and sensitivity are as follows: 15 Ohm/109 db using the Pop setting. Have any of you actually verified this?

Here’s why I’m asking: I’ve been using a Qudelix 5K for playback (which I love) and noticed the battery seemed to drain faster than when using other iems. I ran a test on several iems, and can get around 10 to 11 hours of usage, but with the A7’s, I can only get a little over eight hours. To note, the iems I tested with have a mix of impedance/sensitivity that are similar to the A7s. One of them (Final Audio A4000) is only rated at 18 Ohm/100db, and I can still get over 10 hours on the Qudelix 5K.

So, the question comes to mind, are the specifications for the A7 accurate? I don’t have a multimeter to test, so thought I’d ask all the fine folks on this forum if they’ve ever verified the specs.