Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Battery is regular. It follows the -ies Conversion rule.
Use plural verbs: "The batteries are ready" (not "is ready").
Yes. The plural batteries is standard across all English variants.
The word battery follows the standard English pluralization rule. When forming the plural, battery becomes batteries. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why battery becomes batteries helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using batteries in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The batteries are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.