Santiago - 11-30-2025 at 03:09 PM
Not exactly Baja related except we have all dealt with 12v batteries out of necessity. Last weekend we had a dead 12 volt trolling battery, had to
row back to shore. that night we hooked to our truck battery via jumper cables and let the truck (it has a towing package) idle for about an hour.
Next day we got about 2-3 hours of trolling. Curious if anyone else has tried that.
latitude32 - 11-30-2025 at 03:45 PM
ideally use a DC to DC charger but if you don't happen to have one do what you did but maybe go for a ride to let it charge longer, charging output
will be increased.
[Edited on 11-30-2025 by latitude32]
Maderita - 12-1-2025 at 12:23 PM
The output from the alternator was low at idle (600-800) RPM.
You will be charging the battery much faster if you run the engine at 2,000+ RPM. I usually aim for 2,500 RPM.
Maybe 3,000 RPM briefly, when jump starting another vehicle with a dead battery. Over 3,000 RPM is probably a waste of fuel and unnecessary wear on
the engine.
Disclaimer: I don't know about newer vehicles with their sensitive electrical systems. Read the owner's manual about jump starting, etc. to avoid
damage to electrical/computer components.