how do I find last location when the battery die

Hey hotwaxcrew,

It looks like you checked out the article about locating a missing device using Find My app.

The article goes over important information that can answer your questions. We encourage you to check out the section that says 'Can't locate your device?' from the article to learn more about last location: Use the Find My app to locate a missing device or item

•If you're using the Find My app, you can't see your device's location if more than seven days have passed since its last location was sent to Apple.

•If you're using iCloud.com/find, you can't see your device's location if it's powered off, the battery has run out, or more than 24 hours has passed since its last location was sent to Apple.

We hope this helps answer your question!

Best regards.