It’s indicated “Service” About Battery in the Parts and Service History section. What does that mean?

léonard273 Said:

"It’s indicated 'Service' About Battery in the Parts and Service History section. What does that mean?: 'Service' is the message appearing on my iPhone 7 Plus in About for “Parts and Service History” (Battery). What does that mean?"

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It is Time for a New Battery:

When you see this message, it is informing you that your battery has degraded, and that you need to get a new battery. Apple recommends you get a new battery once the Battery Health reached 80% or less.

Well, you don't service a battery, you replace it. Make sure that you get a genuine Apple battery installed, otherwise Battery Health will not work at all.

Only the Apple Stores and authorized Apple Service shops sell genuine batteries.

You are welcome.