die Aufladung
charging
The process in which a battery or electronic device is supplied with electrical energy.
Die Aufladung meines Handys dauert ungefähr zwei Stunden.
Charging my phone takes about two hours.

charging / supercharging
Loading your saved state.
charging
The process in which a battery or electronic device is supplied with electrical energy.
Die Aufladung meines Handys dauert ungefähr zwei Stunden.
Charging my phone takes about two hours.

'Aufladung' (charging) is the nominalization of the separable verb 'aufladen' (to charge/load up). The basic meaning of 'filling something with energy or content' appears in all meanings, from a battery to an emotional debate.
Ich muss mein Handy dringend aufladen.
I urgently need to charge my phone.
In everyday life, 'Aufladung' (charging) is mostly used in connection with electronic devices. Typical phrases are 'die Aufladung des Akkus' (charging the battery), 'des Handys' (of the phone), or 'des Laptops' (of the laptop).
Die Aufladung des E-Autos dauert an dieser Säule nur 30 Minuten.
Charging the electric car takes only 30 minutes at this charging station.
In a physics context, the most common and important collocation is 'statische Aufladung' (static charge). This describes the phenomenon you can feel, for example, when clothing rubs together.
Durch die trockene Heizungsluft kommt es im Winter oft zu statischer Aufladung.
Because of the dry heated air, static charge often occurs in winter.
This meaning is metaphorical. People speak of an 'emotionale', 'politische', or 'ideologische' Aufladung (emotional, political, or ideological charge) when a topic takes on more than just factual meaning.
Die politische Aufladung des Themas erschwert eine vernünftige Diskussion.
The political charge of the topic makes a reasonable discussion more difficult.
cargo / charge / summons
'die Ladung' and 'die Aufladung' are both connected to electrical energy, but they mean different things. 'die Ladung' describes the stored electrical amount or the state of having energy available. 'die Aufladung' describes the process in which a battery, a device, or an object receives an electric charge. Learners confuse the words because both have to do with 'laden' (to charge / to load). Memory tip: 'Ladung' is what is present afterward; 'Aufladung' is the process that gets you there.

Die Aufladung des Handys dauert heute länger als sonst.
Charging the phone is taking longer than usual today.
Die Ladung des Akkus reicht noch für zwei Stunden.
The battery's charge will last for another two hours.