MMCX Bluetooth cable supporting current HighRes audio codecs

Question

I am searching for a long lasting Bluetooth "cable" which:

• battery lasts at least 8 hours (assume a ~36 ohm in-ear headphone),
• supports for current audio codecs like LDAC, aptX, ...,
• high quality headphone amplifier and,
• bonus, does support Bluetooth Low energy (BLE).

There is for example the RMCE-BT2. I wonder if there are better and cheaper products than this one.

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