As an example, say I play Empower:
on a unit with 1 health and during the battle it takes one damage. At the end of the battle it will lose the +1HP, will the 1 damage remain and the unit will die (aka the unit was considered to have 1 damage at the end of the battle) or will the damage token be removed with the +1HP (aka the the unit was considered to have 1 health at the end of the battle)?
I'm leaning towards it dying because the game seems to deal with damage more than unit health, but I'm not 100% sure.
I looked around for an answer to this question but I haven't been able to find it through my google-fu, so sorry if it has been asked and answered before.
EDIT: Also, on an unrelated topic, if your opponent has no remaining units at a planet during a battle and you have unexhausted units, do you have to attack or can you delay that by using other abilities that take a turn (or attacking a unit on another planet, I believe there is an attachment that lets you do that)? In other words, does the battle end if you can attack a unit at the planet, but there is no unit to attack or if you do try to attack a unit at the other planet but there is no unit to attack?