And just checking, do you want it lit up on display?
If so, you'd need to go for Li-Ion and a re-charge port + 1.2A Fast Charger.... check this link for more info
http://www.ultrasabers.com/help_answer.asp?ID=21#314The other question is, do you want sound?
If you get the Obsidian v4 you can quickly set the saber to silent when on display and then back to sound if you want to play with it, lol
I have a few setup on display permanently lit up with the sound off, the fast charger keeps the batteries charged, so all I do is un-plug the charger cable, take it off the display (mine are on wall clips) and good to go