Which one is better regulated?

[NightCrawl]

True, but a LiIon measured at 3.55V with no load is pretty much empty.

See this thread for more info:

Estimating remaning capacity in LiIon batteries

Estimating remaning capacity in LiIon batteries There exist a few tables showing how much capacity a specific battery voltage is equal to on LiIon battery, but I wanted to do my own for a couple of different batteries and see what I get. For this I am not using the same parameters as in the battery test, here charge termination current is 50mA and I discharge down to 2.5 volt. I have done this to get maximal capacity from the battery. To do these curves and tables I need to discharge a …