## Turn 1

*   Source [S1]: Service warranty lasts 24 months for residential customers.
    *   Source [S2]: Commercial customers receive 12 months of warranty.
    *   Source [S3]: Batteries are excluded after 6 months.
    *   Question: What warranty applies to a residential customer?

    *   The question asks about the warranty for a residential customer.
    *   Source [S1] explicitly states: "The service warranty lasts 24 months for residential customers."

    *   The answer is 24 months.
    *   The citation is [S1].

    *   Answer: 24 months [S1].