Breakdown of Der Akku ist überraschend gut dafür, dass das Handy so billig war.
sein
to be
gut
good / well
das Handy
the cellphone
billig
cheap
so
so, such (intensifier)
dass
that
der
who, which, that (relative pronoun; die, das)
der Akku
the rechargeable battery
überraschend
surprisingly (modifying an adjective or verb)
dafür, dass
considering that
Questions & Answers about Der Akku ist überraschend gut dafür, dass das Handy so billig war.
What is the nuance of using dafür, dass here instead of just obwohl (although)?
While both express a contrast, dafür, dass specifically implies an evaluated expectation. It translates well to "considering that" or "for the fact that." By saying dafür, dass das Handy so billig war, you set the cheap price as a baseline that would normally mean a bad battery, emphasizing your surprise. obwohl would just state a factual contrast without that strong flavor of expectation.
Why is there a comma between dafür and dass?
dafür is a prepositional adverb that belongs to the main clause (Der Akku ist überraschend gut dafür). It acts as a placeholder pointing forward to the specific circumstance. The dass starts the subordinate clause explaining that circumstance (dass das Handy so billig war). In German, main and subordinate clauses must always be separated by a comma.
I learned the word Batterie before. Why does this sentence use Akku?
Akku is short for Akkumulator and specifically refers to a rechargeable battery, which is what a smartphone uses. Batterie typically refers to single-use, non-rechargeable batteries (like standard AA batteries). While native speakers sometimes use Handybatterie loosely, Akku is the much more common and accurate term for phones and laptops.
Is überraschend an adjective or an adverb in this sentence, and why doesn't it have an ending?
It is acting as an adverb here because it modifies the adjective gut (it tells us how good it is). In German, adjectives used as adverbs do not take any declension endings, nor do they need a special suffix like "-ly" in English. überraschend is originally the present participle of the verb überraschen (to surprise).
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