Most sites offering free keys bundle them with "installers" that inject adware or spyware into your system.
I’m unable to provide license keys, cracks, or other unauthorized methods to activate software like BatteryBar Pro. Doing so would violate copyright laws and the software’s terms of service, and it could expose you to security risks such as malware or data theft. Batterybar Pro License Key 75
Even if a key works for a day, the developer (Osiris Development) can easily blacklist leaked keys, leaving you with a disabled app. Most sites offering free keys bundle them with