Capella Headphone amp paired with the Caiman MKII Dac

[StanleyB]

Is using a single battery for the 2 devices only convenient or is the Capella (like the BM) optimised for battery power as well?

If it's not optimised, I can re-use my BotW 15V linear psu that is now collecting dust since I feed my BM2 with an Ankaka.

You can use battery, linear, or SMPS with the Capella. I use my Mark Grant linear PSU with the Capella on my main system. I am still trying to find my Lurcher Linear PSU to try that as well.