Game is glitchy and nonsensical. The price reduction seemed to apply to the offline watts at first, but no longer does at all. It applies to the idle watts gained and rubbing power correctly, only applies to the battery capacity for the next purchase (and subsequently reverts to the regular price), and never applies to itself. For something with no description that is certainly an inconsistent upgrade. Its also far and away the toughest to get to level 50.
The basket upgrades do not show up in the main screen, so its difficult to tell that they apply.
Rubbing power (the main unique aspect of the game) quickly becomes useless as it scales terribly. It seems like you tried to remedy this with the basket upgrades which works to a point, but I'm over 100 K/s on idle watts and rubbing barely makes an impact.
The offline watts are a nice idea but are horribly overpriced and inefficient given the "bucket" mechanic of battery power maxing out anyway. Also, what precisely is the Overnight success medal's requirement? Because if it's half a Megawatt, I've hit that number several times over.