Swapping a Holden Barina battery is a quick driveway job if you’ve got a 10 mm spanner and the will to live. Ignition off, pop the bonnet, note the radio code if needed, then loosen the clamp and remove the negative terminal first, positive second. Lift out the old unit, drop in the new one (same size and polarity), tighten the hold‑down, reconnect positive then negative, and make sure the clamps don’t rotate. Start the car and let it idle for a few minutes so the ECU relearns; a slightly rough idle at first is normal. Expect roughly AUD $150–$300 for a decent battery, or around AUD $200–$400 fitted at a shop, with extra if corrosion cleanup is needed. If anything looks odd—vent tube, security clamp, stray sparks—stop and let a professional finish the job.
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