To determine your battery percentage, you need to check your devices battery settings. Here are the steps to check battery percentage on some popular devices:

iPhone

1. Go to Settings > Battery.
2. Turn on Battery Percentage.
3. The battery percentage will now appear in the status bar.

Pixel Phone

1. Go to Settings > Battery.
2. Turn on Battery Percentage.
3. The battery percentage will now appear in the status bar.

LG Phone

1. From the Home screen, tap the Apps Key > Settings > Battery.
2. Checkmark the Battery percentage checkbox to display the percentage of remaining battery charge on the Status Bar next to the battery icon.

If you have a different device, you can search for "how to check battery percentage on [your device name]" to find specific instructions.