[redshift]

Store mode is the only function that will charge or discharge in order to attain 60%.

I ran my 2S packs down to 7.1V yesterday, when I put them back on to do Store Mode the charger said they were at 15%, and when they reached 60% they were at between 7.5V and 7.7V.

TCS should only be used if you intend to use the pack soon after, and don't want a full charge- 90% to 95% would be the most common settings for people who want to shave off a few minutes charge time, but will only reduce runtime by 1- 1.5 minutes, and theoretically reduces some stress on the battery chemistry as well. That's my understanding at least. I'm still learning the Duo features myself.