5.2 Unexpected battery drainage

This could either mean your battery is old and in need of replacement, or, it could mean that your device is experiencing additional activity load which is draining the battery quicker than usual. This additional activity could be from apps running in the background, or it could be spyware. If you’re not sure whether it’s just an old battery or actual spy software, check the device’s battery health. If the battery is old or malfunctioning, and needs replacement, a message should pop up in the battery settings (on mobile devices) or control panel (on Windows PCs), or via System Preferences (on Macs).