Before posting, try these universal fixes—often they solve 80 % of cases!
Reboot the device.
Check for OS & app updates.
Test in Safe / Recovery mode to rule out rogue apps.
Scan with the built-in hardware diagnostics app (Samsung Members, Apple Support, etc.).
Swap cables, chargers, or outlets.
Free up ≥ 10 % internal storage and clear app cache.
If the problem persists, gather the details below.
3. Must-Include Details for Faster Answers
• Device & Model: Galaxy S24 Ultra / iPad 10th Gen
• OS Version & Build: Android 15 One UI 7.1 / iOS 18.0.1
• Carrier (if relevant): Verizon / unlocked
• Problem Summary: "Battery drops 30 % overnight on standby"
• When It Started & Any Recent Changes: new app installs, drops, updates
• Troubleshooting Tried: list steps + results
• Attachments: battery-usage screenshot, error message photo