Sennheiser CX 1.00 White In-Ear Canal Headphone

What has the longest lasting battery in ear headphones? I have a pair of the White/Blue NuForce in ears but the battery don't last any time at all. It's like they are used. I love them but just don't last. Any HELP is appreciated.

I'm interested in HE5XX and I only have Audient iD14 audio interface(the old model). So I'm curious if the headphone output of my audio interface is enough for HE5XX and other headphones like HD6XX of Sennheiser. Specification for the headphone output of Audient iD14(old model) is: MAXIMUM OUTPUT LEVEL: +12 dBu (0 dBFS digital maximum) DIGITAL REFERENCE LEVEL: +12 dBu = 0 dBFS OUTPUT IMPEDANCE: <30 Ω unbalanced VOLTAGE GAIN: +6 dB (optimised for loudness) FREQUENCY RESPONSE: ±1.0dB 10Hz to Fs/2 (load dependent) CROSSTALK: <-100 dBu @ 1kHz & 10kHz THD+N @ -1dBFS (1kHz): <0.002% (-94 dB) DYNAMIC RANGE: 108 dB un-weighted, 111 dB A-weighted MAXIMUM LEVEL into 30 Ω: +4 dBu 0.005% THD+N Power: 101mW MAXIMUM LEVEL into 60 Ω: +5 dBu 0.004% THD+N Power: 64mW MAXIMUM LEVEL into 600 Ω: +13 dBu 0.0025% THD+N Power: 39mW 1/4” TRS JACK: Tip (Left), Ring (Right) & Sleeve (Shield)

I'm really interested in these headphones, love my Sennheiser HD6XXs. But I've gotten used to the wireless capability of my Logitech G930s. Is there a way (hardware?) to make these PC38Xs (or any wired headset/headphones) wireless. In my case, these would be used for a PC and my PC doesn't have wireless or bluetooth.

Question for those who already have this headphone. I just received mine about an hour ago and while I realize they need to be broken in for up to 200 hours, they sound very bright and somewhat weak on bass. How much change can I expect once broken in? I have yet to try any of the dampening pads and figure I'll wait till the stock headphones are fully broken in. My other headphones are Sennheiser HD 660 S which sound completely different and definitely warmer.

Why still so expensive? Drop and Sennheiser can both do better. When I first heard the 8XX was a thing, I was stoked to pick up what I thought was going to be a sub-$1000 headphone in the HD800 family. Guess I'm still waiting.