cutoff voltage
voltage at which a battery is considered fully discharged, beyond which further discharge could cause harm
en-GB/ˈkʌtɒf ˈvəʊltɪd͡ʒ/
en-US/ˈkʌtˌɑf ˈvoʊltɪd͡ʒ/
voltage at which a battery is considered fully discharged, beyond which further discharge could cause harm