battery question

[MarioOwnsAll]

I'm planning on using two of these batteries in my next portable but they don't have a protection circuit (as far as I can see) can someone tell me what kind of protection circuit I would need for two of these batteries?

Oh and from what I hear there are two pins where the cart slot connects to the mobo that are audio left and right is this right?

EDIT: lol forgot the link to the batteries
http://www.batteryspace.com/highpowerpo ... arate.aspx" onclick="window.open(this.href);return false;

[The Smooth]

Gonna need some specs.
Edit: I see you edited yours.

[limpport]

http://forums.benheck.com/viewtopic.php?f=43&t=34576" onclick="window.open(this.href);return false;