It'll fail to crank over the engine despite having a fully charged battery.
My vs commodore won't start it's like a flat battery when I connect jump see leads from another car it slowly turns over but stil like not enough power ?
First make sure your battery is fully charged. Crank the car, if the engine is turning over (moving) your starter is working. HTH
Starter solenoid? Battery not fully charged?
Does it turn over? Does it have spark? Does it have fuel?
Over time you will shorten the lifespan of your battery. Once it's fully charged if you don't need to use the battery just unplug it from the laptop and only work with mains power.
Most definitely you can ruin it. Always charge an auto battery with an automatic charger that shuts down when the battery if fully charged.
It will start if there is enough charge in the battery to turn the engine over. However if the alternator is weak then the battery will not be charged fully.
Our original battery had to be replaced about 4 months ago (we have a 2005 500). The battery showed it was fully charged --- but it wasn't. This was the original battery that came in the car. You might take the battery out and take it and have it professionally checked at a parts store. We thought something else was wrong with the car since it wouldn't turn over, but it turned out to just be the battery.
Most good battery chargers are automatic and will stop charging when the battery is fully charged. But if the charger is a manual charger it can overcharge the battery. With this type charger it is up to you to remove the charger when the battery is fully charged. Normally this is based on the amount of time the charger takes to charge the battery pack. Operators manual will list the time.
Sounds like a connection problem from the battery to the car. Easiest way to find out is to get a jump start from another car, if it works then it's the battery, if not then is either the battery cable or an alarm/immobiliser that is still armed.
Is it cranking over at all??? Ceck for fuel preasure at the rails. also check for sparK