Upgrade batteries to something new?

[techgeek]

Anyone tried replacing the batteries with more modern alternatives?

I got two units on ebay as I always wanted one when I was in school.

Now as an adult I am going to play with this thing now! Should be fun to hack!

[mercurysunblast]

I used to use Toshiba Size F5 gumstick batteries for my classics... they worked... but now I can't find those exact batteries...
I have some Xtreme units too, but I have never looked into battery replacements for them...

[spookyzalost]

It might be possible to utilize a modern replacement, anyone know what the specifications of the batteries are?

I'm looking at picking one up soon and will have to see if an adapter using modern Li-technology can be made.