I have a Dell Latitude D620 with a -big- power adapter. A few days ago I ordered a Dell Studio computer for my friend, and it came with an extra power adapter (model number LA90PE1-01). My friend doesn't need it so I wanted to check if this adapter can work with my D620. The model numbers on the adapters are different; however the input/output'/watt are all the same. Plus, I saw on a couple of eBay listings that LA90PE1-01 is compatible with D620.
When I check with a Dell chat agent, she told me that if I use it it will damage my computer, and is trying to convince me to buy another one. She's a salesperson so I'm not sure how much I should trust her. I have no clue how power adapters work so I thought maybe I should ask here...