Originally Posted by Mr. Wiz
For what it's worth, they are far more than just a battery and a regulator. I've kind of beat this one to death here but when I see you next time I'll show it to you. I'll just say it's a very convenient system is a tiny package.... and yeah, you pay for the convenience.
I'm with Tom on this one - but go one further. A cheap one-cell LiPo with no regulator/booster. I like eliminating components connectors, and wires (= potential points of failure).