DIY Arduino Car Battery Spot Welder w/ Pulse Time - Circuit Diagram and Code Included

Hello members! This is a little pulse-timed spot welder project I've been working on to build a new battery. I figured you guys might like this and hopefully find it useful.


Link to Code and Diagram:
https://github.com/jalius/arduino_spot_welder/

Materials:
8x MOSFET PSMN2R0-30PL
VS-100BGQ045
Foot Switch
600 CCA Battery

How many welds can you get out of a battery of this size before it needs a recharge?