Electrics: Should I fit a bigger battery?

[R-P]

I would indeed always detach the negative terminal. I have had to unbolt the positive terminal under the hood a few times due to CEM problems and I was scared as hell I would touch the chassis with the wrench... (There are stories of this happening in a submarine (with vastly bigger battery banks as they can run of off their batteries for a long while). And when the wrench made contact between the positive terminal and the hull, it (literally) evaporated!)

Originally Posted by BlueRubber

As mentioned earlier in the thread I did try to use a multimeter inline on the car but the car uses too many amps when reconnecting the battery, which risks damaging the meter.

Here's my solution:


The green lead is in parallel to the measuring shunt (= resistor of a very low value) and fuse inside the multimeter and thus it can pass pretty big peaks (probably 50A) without blowing the (very expensive) 20A fuse in the meter.
After all computers shut down, you can remove the green lead and measure the actual leakage current.

[BlueRubber]

Thank you, that is a very nice solution. I tried something similar with some spare wire I had already but the wire wasn't thick enough and started to melt!