Which battery is better?

Will the LED's be just as bright if I use this battery

http://www.thecustomsabershop.com/74...Pack-P758.aspx

Instead of this?

http://www.thecustomsabershop.com/74...Pack-P699.aspx

Reason being, is that I need more room in my saber for a crystal chamber.

The only difference between the batteries will be the runtime. The 18650 pack will last longer, but will take more space. The LED will run at the same brightness.

Cool, thanks! I'll go with the smaller battery then.