power supply
 

Hello,
My current power supply is a HP DPS-600PB B which is 575 watts max. It works great.
I charge 4 packs at a time at times. I charge 4S 5600mah, 2S 7600mah, 1S 7000mah. the most at the same time would be 2 of the 4S packs along with 2 of the 2S packs.
The current charger works great. However, it is over 3-1/2 lbs.
I am looking for a different server power supply that I can use which is lighter in weight and possibly smaller in size. (Note: I have used PC power supplies and they don't seem to last, so a server power supply is what I am looking for).
Do you have any suggestions on a lighter PS that I could use or somebody that makes/sells a power supply that is lighter in weight and still have enough output?

thanks,
tim