Is the Triton VV regulated to give exactly the desired voltage until it can't? I don't mean does a 3.5V selection, for example, give exactly 3.5V. What I mean is, if I select 3.5V, whether it's actually 3.3V or 3.7V or somewhere in between, will it give me that same voltage until it can't, and then quit until recharged? If it doesn't do this, is there an 808 battery that does?