Sold individually, these nickel plated springs are what you need to top off your driver or switch.  They are easy to solder to and do not corrode easily.  The design of this spring makes it ideal for copper braid or wire bypass.  Works with all battery termination types.

Dimensions: 

• Top Diameter: 5mm
• Base Diameter: 8mm H
• Height (uncompressed): 10mm
• Height (compressed): 3mm
• Wire thickness: 0.7mm

This is a great general purpose spring, it is tall but pliable enough to allow for a wide variance in cell lengths.