Great info. I thought maybe my low battery warning might be broken because I never heard it. However, I followed the consensus advice here to be on the ground by 14.5 and will now err on the safe side landing my H at 14.7v.
With my Venom ProDuo a charged OEM pack registers at 16.7v when the H and ST16 are on and ready to fly. On my first few flights with beautiful windless weather, and rookie caution, I was getting about 14-15 min flights. I thought that was right on target.
I also don't immediately recharge packs, and if a charged pack won't be flown I bring it back down to storage voltage. I learned a lot of this info from a few youtube videos about LiPo care (one by Venom was excellent), BatteryUniversity website, QAs with Venom support -- which is excellent(!) -- and the experts on this forum, namely PatR.
In another thread, PatR said that our batteries are our fuel. I think that's exactly the right way to think about it. It makes the care and maintenance of these amazing LiPo's easier to understand as critical.
If my boys' traxxas cars run out of "fuel" they slow down and stop. If my H runs out of "fuel" it has a very expensive crash!
Good thread, Dondec!
-Chris