QUOTE(ayamxxx @ Mar 1 2021, 09:20 AM)
Lesson learnt is to change battery every a year or 2 or if want to extend it, recharge the battery. Is it? Mind to advise from your view
It is hard to give a straight answer to that, because everyone's battery State of Health is different and so it is with every vehicle's electrical charging system and to re-charge the battery is based upon individual scenarios.
For example, awhile back I was called to attend to a Dr. with a dead battery. I was surprised to see that the battery was very clean and the written date was 2.12.2020. So its just 2 months old. So I told the Dr. no worries, this battery could be recharged back.
Little did I know when I hooked up the tester it registered a BAD CELL status. So feeling rather embarassed, I had to tell the Dr. the truth that this new battery has a Bad Cell and it is suicidal to charge a battery with a Bad Cell, let alone use it.
I then proceeded to test the vehicle charging system and it turned out fine.
I suspect the reseller probably had no idea that he sold a defective battery to the Dr. There is no way a battery that is in good condition could fail within 2 months if the car electrical charging system is in good condition. The unknown brand of Regular Flooded Battery had sufficient water in all the cells. Luckily nothing happened to the Dr. while driving between Muar and Melaka.
Lesson learnt, next time I will keep my mouth shut until the tester shows me a definitive answer. LOL
Above example : New Battery + Bad Cell status = NO recharging
Q : Whether it is 1 or 2 years old battery, will recharging extend its life ?
A : It depends. If the electrical charging system is producing the sufficient voltage under normal use, means the battery is sufficiently charged by the alternator already. Hence connecting it to an external charger is completely unnecessary, in fact wasteful if not detrimental.
However if the electrical charging system is NOT producing the required voltages under normal use, means the battery is NOT sufficiently charged by the alternator. Once that is ascertained to be true, then connecting it to an external charger is very impotant because batteries must kept in a high state of charge.
Time is not the factor here (as seen from above example), what is really important here is the vehicle's electrical charging system.
A good charging system + a good battery = Long life span
A good charging system + a bad battery = Short life span
A crap charging system + a good battery = Short life span