Slightly bent vent tube, is it serious? With my hands I don't feel any heat from my CPU when using Linux, but I still get 1.5hrs of battery lifetime, could this be
CompTIA A+ | Microsoft MTA O/S: What is CMOS Battery?
restoration - Restore corroded AT motherboard with dead CMOS battery - Retrocomputing Stack Exchange
How to Replace a laptop CMOS battery « Computer Hardware :: WonderHowTo