How do you pronounce "batt"?

Batt is pronounced like bat with extra T emphasis, pronounced as /bæt/ in International Phonetic Alphabet, rhyming with cat, hat, mat, and sat, with short A sound as in apple, and hard T ending, similar to bat pronunciation but with slightly longer T closure. In American English, batt pronounced as BAT, with short A as in bat, and T sound crisp, like bat, but spelled with double T which does not change pronunciation, double T just indicates short vowel in spelling. In British English, same pronunciation /bæt/, short A. For example, fiberglass batt pronounced as fiberglass bat, insulation batt pronounced as insulation bat. So pronunciation of batt is same as bat, one syllable, short A, B sound at start, AT sound, with T ending, rhyming with cat and hat. Some may pronounce with slight emphasis on T due to double T spelling, but standard pronunciation is identical to bat, /bæt/, one syllable, short vowel. So batt pronounced like bat, rhyming with cat, hat, mat, with B and T sounds.