Good, but could have been better
Just when the animation was getting really interesting, it ended, and very abruptly. for a second i thought that the female robot would get up and do something, or whatnot. You know, get some closure on the subject for the audience. To borrow from another reviewer, it looks like you ran out of patience in the end.
And while the suspense factor was well done, it could have been supplemented with a desperate chase back to the robots home or something. Just a thought!
Storywise, I wasn't able to percieve a whole lot. Sure, the robot fixes other robots for a hobby or living, but why the heck was he willing to give up his life for the other 'bot? Was it his wife? or love? or was he simply programmed to be ridiculously compassionate and selfless? No one knows except you of course. You don't even have to add a whole lot to explain things either, if you decide to change it. just little things like the robot looking a photograph containing the the girl 'bot or something.
Lastly, the animation itself wasn't too bad, but it also looked incredibly flat like moving paper over paper. I suggest adding shadows and lighting to help suggest depth.
Anywho, just my suggestions/observations. I know it's a long list of criticisms, but honestly it wasn't too shabby at all, and I see a lot of potential here. Just needs a few improvements, and then it will be awesome.