@purrin asked about mini^3 portable amp voltage...
This from AMB:
"The two LiPo cells is nominally 7.2V but through much of its charged runtime it's above 8V (fully charged is 8.3V). Compare this to a 7-cell "9V" NiMH battery which is nominally 8.4V but typically runs a bit higher than 9V fully-charged. So basically, with LiPo power, you lose about 1V. But the reality is slightly better than that, because the Mini3 LiPo version uses low-dropout schottky diodes in the power circuit instead of the NiMH version's standard diodes, and we gain back about 0.7V. So, all told, the maximum output voltage swing is approximately the same from both variants, but the LiPo version runs almost 24 hours (high performance edition) or 50 hours (extended runtime edition) per charge, and takes only about 1.5 hour to charge from fully-depleted to fully-charged.
When running on external power, the LiPo version uses a 9V regulated DC wallwart while the NiMH version uses an unregulated 15-24V wallwart (but is regulated down to 12V internally)."
So, if you might be using with the wallwart mostly- the non-LiPo version can run with more power...otherwise the LiPo versions will just run longer. I'll keep one of each version around!