• Suspect the starting ability is down to how flat the battery is. How much charge the little battery puts in to the big battery.

  • Yeah, which worries me a bit because the battery in mine is going to be dead. It's been on charge all weekend and it's still charging. Stupid cars.

  • Once they go totally flat they may never charge again- you can fool them by linking another battery to both the dead battery and then the charger, sometimes.

  • Sometimes batteries need some conditioning, as the plates can sulfate.

    Got a volt meter?

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