I have two 4D batteries in parallel on my sailboat. I measured my voltage with ampmeter at 12.85 amps then turned on three DC cabin lights and then checked to see the draw on the batteries. They're 8 months old and completely charged. Over the course of 1 minute I watched the voltage drop as in 12.85, 12.83, 12.80, 12.75 etc. Is this normal to see this voltage change with what I would estimate probably 3 or 4 amps being drawn on it?
I'd appreciate any response or suggestions on this.
TNX
I'd appreciate any response or suggestions on this.
TNX