Power... yes you need it

I will preface this with by stating I run a fairly robust POWER system. I have a 36 amp hour deep cycle gel battery that I have 4 USB 5 watt ports, 4 12 volt cigarette adapter plugs and a "recharging" port attached that I have adapters for either USB connections or cigarette adapter connections.. I can get PLENTY of power out of the system... the problem is that sometimes I can't get the actual power where it's needed since my USB solution is a simple "charged port" solution with no data exchange capability.

I recently discovered that the RPi is REALLY poor on it's power supply by the built in USB ports.
If you decide to add an external hard drive to a system using a guide camera, a capture camera and an auto-focuser... be prepared for problems. I was running an ASI585MC, an ASI auto focuser and an ASI290MM for guide scope duties... and when I attached the external hard drive, the system was literally brought to it's knees. This will most likely NOT affect you if you are running an ASI or QHY Pro level camera, since they are powered individually.
I got non-stop hardware monitor alerts that my RPi was suffering from low power.
I ended up ordering a Pegasus Astro Pocket Powerbox to provide some additional power to the system since I typically am running off a 12v battery solution, and decided that I liked to have the ability to also run some dew shields off of it also.

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I do have a generator (a fantastic iGen 2500 that I got for a song) that I can carry with me when at remote locations that would allow me to run a USB 120v powered hub..but I'd prefer the quiet that a battery powered solution provided. And once I started pricing components to do the equivalent of the PowerBox... I quickly discovered that it would be MORE economical to buy the finished product.

One suggestion.... make sure you have a newer battery if using a home-made power 12 volt power distribution system. I discovered that after about 4 hours of running my ASI533MM Pro with the thermo cooler on, I was down to 11.9 volts. And the toys did not like that.
Since the battery was already 4 years old and had been through many a recharge cycle, I decided it was time for an upgrade.... so I've ordered a LiFePo4 36Ah battery from Amazon along with a special charger for it that should maximize recharge time. One of the main benefits of the new batter is it is 9.4 pounds compared to the 23 pounds for the lead acid battery. And when you carry this stuff in a travel trailer for remote site visits, every pound saved counts.
The SefePoder battery I am getting has gotten good reviews, and is one of the higher Ah ratings for its size. (this battery came in damaged and would not take a charge nor give out any power. Th e vendor immediately refunded me my purchase price and told me to keep the battery, and after opening the battery case up, I was NOT impressed with it's construction. The control board was simply attached via a square of 2 sided tape to the batteries, and the batteries themselves were in a chintzy case with exposed paths from each battery. I did contact SefePoder, and they offered to sell me a new controller for $31, which most likely was the issue since it (and the at least one battery) appeared to be damaged in shipping. I have yet to order that part from them as I placed an order for a larger battery.
What I ended up getting, and which has been working great so far, is a 12.8v 50Ah battery from Power Queen. It arrived quickly, was packaged securely and had no damage.
I have been running the EQ35-Pro mount with it, and after over 9 hours of use, it has only dropped to 13.2v.