Hi all I am trying to run a Motherboard processsor hard drive with my battery.

I have 2 4200Mah 4S battery packs wired in parrallel.

I built my own power supply using 2 LM4712 Votlage regulators w/ heat sinks. I am poweringthe EZB from the 12volt power supply as well as the motherboard.

I am using a PICO PSU 160 (200watt) The motherboard is rated for 200watts as well.

My problem is the board powers up and then as soon as windows starts to boot from the drive it shuts off. I tried putting a fan on the regs because I thought that might be the issue but it didnt work. Shuts off at the same place.

Using a volt meter I can see the 12 volts fluctuates as it is booting and goes from 11.89V to about 11.6 when it shuts off. Would that matter?

I then thought maybe the Pico psu is being over taxed as the mobo takes 200watts. So I re wired the hard drive sata connector to directly to the EZB for 5v and my powerbar for 12v to the hard drive directly. But same problem happened again.

I am pretty new to working with hardware on this scale. But the power bar I made appears to be working. I am at a loss of what to try next...

Please help!