Yeah, I had a tech come in for the first Sony we bought and he wanted to kill himself. He actually called his boss in front of us and told him not to ever send him on a Sony call again lol. We :rofl’ed.
We use Latitude and Optiplex. Maybe the business class machines are designed with ‘ease of disassembly’ in mind.
Anyway, try the battery dude. You should be good.