Suitable adjective for there is ... promblem with the battery

There is serious problem with the battery

Explanation:

Adjectives: These are words that are used to describe or modify a noun or pronoun. They describe attributes or qualities of the nouns Adjectives are placed usually before they noun or pronoun they modify or describe.

Serious is a descriptive adjective which describes the severity of problem.

Adjectives may be of the following types;

Descriptive adjectives: e. g. happy, tall, cold, hot, nice, bad, good etc.

Demonstrative adjectives: e. g. this, that, these, and those.

Indefinite adjectives: e. g. all, another, any, both, each, either etc.

Interrogative adjectives: e. g. which, what, and whose.

Possessive adjectives: e. g. my, your, his, her, its, our, their.