I have installed Linux Mint 13 (Mate) in my friends laptop (Toshiba Satellite). I put a Battery charge Monitor applet in a panel. System start with its native Power Management Applet. Both tools running smoothly. But both shows some different date about battery power when laptop running in battery. I found different information from both tool. When I just pool out the power cable from the laptop body: 1. Battery Charge Monitor 1.2.1 shows: System is running on battery power. 4 hours 12 minutes (98%) remaining System is running on battery power. 4 hours 12 minutes (98%) remaining in LinuxMint 13 2. Default Power Manager shows: Laptop battery 3 hours 40 minutes remaining (97.9%) Laptop battery 3 hours 40 minutes remaining (97.9%) on LinuxMint13 I am really confused. I dont know which is actual reading, which shows perfect information.