Quote:
Originally Posted by aaron11
Hi😁
New battery when flat a year later .
Car was sitting there for 2 weeks is this normal.
I have 2 alarms.
Also my charger is only 2.5 volt and after 28 hours it was still charging ???
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Over a period of time a battery will discharge sitting on the shelf, even without being connected to anything.
This is the reason it's possible to buy a brand new battery & it isn't fully charged.
Once you install a battery in a modern vehicle the battery will discharge because it is powering the electronics.
Consequently, if you are driving your vehicle infrequently, or only travelling short distances the alternator will not be able to recharge the battery.
The solution to this situation is to recharge your battery periodically, perhaps as often as every two weeks to keep it in optimum condition.
Two conditions that are guaranteed to shorten the battery lifespan are undercharging or overcharging.
A quality 'smartcharger' that you can leave connected indefinitely is the solution.
You mentioned your charger is only 2.5 volt.
I think you may of meant 2.5 amps, which will charge a standard sized battery.
Obviously a 2.5 amp charger will not recharge a battery as fast as a 10 amp charger & a 10 amp charger won't charge a battery as fast as a 25 amp charger.
Generally a battery will recharge over a 24 hour period.
If your battery has been on charge for 28 hours, the battery may be defective.
Or perhaps your charger is defective.
A battery, charging & starting systems test will determine if the battery is defective or not.
What type of charger are you using?
How do you know if the battery is fully charged or not?