Covid lockdowns have played havoc with batteries and unless their charge levels were maintained while not being driven, the battery would have had a rough time and sulfation would have started. Maybe the battery can be charges but leave it for a week and it will go flat agaion.
The easiest way to determine if the battery is your issue is to load test the battery (repco/supercheap does them)
but i think getting a christmas tree of warniong lights on your dash is indicative of a battery with low state of charge (cause its old and sulfated)
As its almost certainly the battery, what you can do depends on where you bought the vehicle.
If it was a private buy and the load test shown your battery is dying, just go and get yourself another battery.
If you got the car from a car dealer, the following provides the statutory warranty provisions:
Age of Car | Kilometres travelled at time of sale | Warranty Entitlement |
---|
Not more than 10 years | Not more than 150,000 | 3 months or 5,000 km (whichever happens first) |
Between 10 - 12 years | Between 150,000 and 180,000 | 1 month or 1,500 km (whichever happens first) |
More than 12 years | More than 180,000 | No warranty |
So if it was a used car and you have warrenty, then go back to the dealer and request a warranty repair. If they fobb you off then hand them a letter outlining the faults you've had (many warning lights on dash and battery test shows defective battery) and request that they are addresses the cause as part of their statutory warranty obligations.
After all, its not unreasonable to expect them to test the batetry before sale/delivery and replace it if it fails the test. Simply charging a faulty battery and pushing the car (and the buyer) out the door is unacceptable in my opinion.
If the car dealer notified you in writing (via a defects notice) that the battery was defective, before the sale, then thats on you.
Batteries are not covered by statutory used car warranty but I'll leave the above as a reminder that you are covered for other issues..
So just go and get yourself another battery may be the simplest thng unless the dealer can show some good will
PS: you may still be covered under the ACL statutory warranty that applies to all products sold by a business in Australia, including second hand cars. Your call which way you want to go