Six plus years ago when we moved aboard, I had a spare series 27 battery from the prior boat. I put the spare battery in the lazerette and it has come in handy a few times as a 12v source for running a drill pump, as a battery I could lend to a broken down boater, and peace of mind to know I could always jumpstart any of my motors.
The battery will no longer take a charge and I am trying to decide - do I go trade this core in on another battery to have around or do I go buy one of these all-in-one Jump packs. I would still keep my 20' jumper cables aboard and my 120v powered battery charger.
Would the Jump packs have enough amps to turn the diesels?
When I look at the jump packs that claim to be able to start a diesel engine, I could buy three spare batteries?