Switching to battery power

My new DAC uses super-capacitors that are said to act like batteries.  When I go from stand-by to on, it takes a bit over 2 minutes for the super-capacitors to charge.  Why don't designers use these more?

I use a Thales turntable and have never been happier.

I have never heard ASR but a friend whose opinion I highly respect on these matters says it’s the best sounding integrated out there. 
(Both Thales and ASR are battery powered)

Running very low level devices like phono stages off batteries makes sense. Channel D does this with several of their phono stages including the $60,000 Seta L20. The AC charger is switched off during operation. 
Otherwise, there is no significant benefit worth the expense. We have excellent power supplies.
In theory since a really big battery is a really big capacitor you could build a very powerful amplifier around one. I am no expert in this but it seems that the cost and size of such an amplifier are prohibitive as nobody seems to want to make it.

I have never heard ASR but a friend whose opinion I highly respect on these matters says it’s the best sounding integrated out there.

Yes but they can go crazy, and that heatsink cracking and popping is the bias going nutz, very dangerous.

 

When the battery supply gets too low, weird things begin happening, like the inputs start switching on their own making the music go back and forth between glorious and blah. The Direct no longer is Direct but Input 5, even though the lights indicate it is Direct. The amp is susceptible to weirdness when the heat sinks suddenly pop and crack at random intervals and scare you with low level music

Cheers George

I’ve never had a problem George and Herr Friedrich has been making ASR since the early 1980’s. It’s now at the tech because I have a signal cut in the right channel but this is the first time since I bought it that I’ve had repair work done.
Any views on the Milwaukee lithium generator?