How many letters does the top answer for “an electrical device characterized by its capacity to store an electric charge” have?

The most common answer is capacitor (9 letters).

Crossword clue: an electrical device characterized by its capacity to store an electric charge

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

capacitor 9 letters wn-def

an electrical device characterized by its capacity to store an electric charge

condenser 9 letters wn-def

an electrical device characterized by its capacity to store an electric charge