Power source feature seems pretty stupid though. Rather wait for a mod to fix that. If I've read it right. If one would run out of power you'll have to abandon your armor where your power ran out and leave it? So if those power source/batteries are scarce, it sucks.
I've already spent my first power source, though I've recently found another. You go through them pretty fast. Didn't they hint that there was some perks for Powered Armor before release, can only see the Pain Train one where you can trample enemies, with 10STR. Maybe you can upgrade the power source. The no falling damage is pretty fun, though, like the water walking enchantment abuse in Skyrim.
edit: there's an intelligence perk that makes fusion cores last longer, and you can buy them in shops, and not running while in the armor also makes it last longer.