Battery Force Calculators

Plan your 12V setup with easy, accurate tools built for Australian conditions. From voltage drop and alternator load to fridge run time, our calculators help you size cables, choose the right battery, and avoid power headaches on 4WD, caravan, camper and marine trips. Select a tool below, enter a few details, and get instant results you can trust. We’re adding new calculators regularly - check back often or visit us in-store for tailored advice.

  • Glad I dropped in here to get a new battery. Helpful, friendly and knowledgable.

    Enjoyed a coffee while the team replaced my battery and had me on my way.

    Great range of other products for 4WD and camping too!

    - Mark Rattigan

  • Thank you SO much to the guys there this morning who very kindly replaced my headlights on the spot (a job normally done by husbo but he currently has a broken back and foot and is in a wheelchair).

    The guys were so friendly and helpful and really went above and beyond, thank you so much for such brilliant service!!

    - Genevieve Beckett