Diamond Saber not working anymore?

[Darth Nyin]

Hey everyone! So I had recently purchased a Diamond Scorpion. Now, this may be my own fault but I let the batteries in it die. I did not get a charger for it, even though I have a charger port. I recharged teh batteries inside of it, and the saber doesn't work. I replaced those batters from another saber, same type of rechargeable batteries still nothing. Both sets of batteries will operate my other saber though. Any ideas?