3 months is enough to completely drained the battery and sub-$100 charger may not be "good" enuf to revive it and let it charge.blindemboss wrote: ↑Oct 27th, 2018 2:53 pmI have a 2012 Mazda 3 with a one-year-old battery (recently replaced) By the dealership.
With a 3 month period away from driving due to injury, I recently tried to start the car. Completely dead.
I had it boosted by another vehicle, and drove around the park for about 40 minutes. The next day, the car wouldn’t start.
I’m guessing your battery had not fully re-charged enough to turn over.
Would connecting a battery charger overnight do the trick?
Once fully re-charged, can I be confident it won’t die out again in a day or week?
If you drive the car around for 40mins, that should charge the battery properly. Make sure you are driving it for at least 30mins and not just idling, as some cars these days decouple the alternator when idling to improve efficiency. Given battery still wont start the next day, take it to a CanTire etc and they can test whether the battery can accept a charge or not.