I'm currently into converting my Maul half-saber. I'm going to 'switch it' Jedi style with a green blade instead.

To further modify the look of the saber and avoid the nagging 'accidental-off' rotation switch, I'd like to replace it with a push-on button. Is there any switches available for that?

Also, since AAA batteries are quite expensive in the long run, is there an easy way to modify the batter pack into a rechargeable one?