John and I have the same set up so this is what you want to look for:

A West Marine Bilge pump that pumps 460 GPM and draws 1.2 Amps per hour.
It is important to look at the Amp draw because this will tell you how long your batter will last. (My first pump was a Rule that took 2.4 Amps per hour which is why I changed pumps after my battery went dead half way thru a tourney once.)

The batteries we use are a sealed 12 volt the have a 7 Amp hour rating, they are great and do not take up much space.

Here are the specific specs on mine which is a MK #ES7-12


Nom Voltage(V) 12
Nom Capacity (AH) 20/10/5hr rate 7.2/7.2/6.12
Weight 5.91 (2678kg)
Length (mm) 5.94 (151mm)
Width (mm) 2.56 (65mm)
Height (mm) 3.70 (94mm)
Terminal Height(mm) 4.02 (102mm)
Terminal Type / Position F1 / 5
Max discharge current (A) 5 sec 36
Ambient Temp Charge 32°F - 104°F
Discharge -4°F - 122°F
Storage -4°F - 104°F
Max Charge Current 2.16


I am sure Deacon could help you out getting these items at the store where he works.

Also don’t forget a charger mine is a guest charge that will regulate your battery charge so you do not have to keep track of how long it is plugged in.

Hope this helps,

FIT