Vandersteen 5A's Internal crossovers/batteries

I think the Advanced Lithium 9V Battery is the only one they make. Are you sure you're not looking at the rechargeable 9V battery? Also, if I remember correctly, you have to soldier the batteries. They don't just plug in.

I use Ultimate Lithium by Energizer. Supposedly they are the longest lasting. I also use Duracell Quantum Battys which may or may not be lithium.

I forgot to ask that Richard in the manual says to use a soldering iron not a soldering gun. What do you suggest? I own a weller soldering gun.
Radio Shack has a 35 watt iron. Also should I use silver solder?

Thanks Alan