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Yes. Per above. Li Ion batteries do like to stay charged. They are not like older re-chargeable batteries that were supposed to be run all the way down before recharging. Li Ion do better if recharged as soon and as often as possible. It is not good for any battery to be allowed to stay in a discharged state for a long period of time.
Not entirely ... Li batteries do OK when kept fully charged and/or only allowed to partially discharge before recharging, which is one of the reasons they're so popular (along with better energy density, higher voltage and some other key properties). However for best battery life, it's better to leave them off the charger, at least if they have at least 40-50% charge in them and then charging right before use. It's *not* good to leave them in a low charge state (e.g., 30% or less). And storing them somewhat cool is good, though using them cool/cold will have a lower effective capacity. And while they don't have quite the so-called "memory effect" of older battery technology, it *is* helpful to fully discharge them periodically.
