Compact Refrigerators

Car Fridge consumption?

If i have an auxiliary battery in my car 55Ah, and my Fridge pulls 3 amps , how long till my Battery discharges to a point where the fridge won't run.

Public Comments

1. If you divide 55Ah by 3A you get 18.33 hours, using up the capacity of the battery. However a battery may not operate at full efficiency all the way to complete discharge and voltage may drop too much to run a particular Fridge to the very end. Only certain batteries (for boats, etc.?) are designed for deep discharge.