I got an old Westell DSL gateway (computer) modem from a friend, but it didn't have the power adapter. I looked on **** for replacement power adapters and it looks like it requires one that has an output rating of 12V and 1amp/1000mA.

Now, I also found another power adapter laying around. Its actually a Westell branded power adapter and was previously for some other similar piece of equipment. Its plug fits this Westell gateway, but it has a power output rating of 12V and 1.25amps/1250mA.

Logically, I'm thinking it can't be used since it has too many milliamps. Yea, it might initially work, but will ultimately burn up the equipment at some point. Is this pretty much the case or will a 250 milliamp difference not really matter?

Also, I found another adapter laying around that while it fits this Westell gateway as well, it has a lower output rating. I think its basically 7.5V and 800milliamps. Will this rating damage as well?