Looks like an awesome
mod Squeeze!!
How is it connected? Did you solder to the batt or? How do you charge it?
I was thinking about making one similar since cellphone batts have such a long life and I can get them so cheap (off-brand G1 batts have 5.2Ah and cost ~$6), but I didn't want to build a charger for it, or have to change it for the batt in my cell to charge it... I'm also not sure if they're protected (It's my understanding most phones have the protection built into the phone instead of the batt pack)...
Again, it may not be 'pretty', but ingenuity and functionality make it an awesome
mod!