I think your feedback was good, Mathius. The price wasn't too horrible. Usually those repros go for around $50 like previously mentioned so at least you didn't pay THAT much. I have the real deal, but never really take advantage of the battery since I rarely play Mega Man games for a few stages, especially the Genesis/MD version where there is a slight delay between when you touch the d-pad and when he starts moving. I think they did that to make it easier to creep towards the edge without falling. But leaving your Genesis on for days won't hurt it. Just be sure to turn the TV and mega-stereo sound system off.
As for the Outrun 60fps mode, you have to go to the options screen, highlight Game Mode, then hold A and C and press Left or Right. You can now choose from Overseas, Japan, Overseas [smooth] and Japan [smooth]. Always choose overseas because the Japan track layout is far inferior. Unfortunately the Genesis version of Out Run is stuck with the shitty Japan layout.