A battery is only an electrical STORAGE device; when functioning properly it stores electrical energy.
On the other hand, the ALTERNATOR produces the electrical energy to operate all of the electric components in the vehicle AND sends additional electrical energy to the battery for storage so that the starter can function NEXT time you want to start the engine.
If the alternator is not functioning properly the battery will eventually discharge. That doesn't mean anything is wrong with the battery, it just hasn't been given anything to store. Have a reputable auto parts retailer test your charging system for you.
At this point you should be suspicious of the alternator.
If you turn the key and the lights in the instrument panel dim but the engine doesn't start... or if the battery volt meter is in the red or low. This indicates that the battery is or may be dead and you need a jump. The only thing a jump can help you with is a dead battery. You may need a new battery if your engine has taken longer to start in the previous days/weeks. The battery may be fine and just need to be jumped if all you did was sayy... leave the lights on and run the battery down.
If I had to guess I would say you have a short in the electrical system that slowly drains the battery as it sits.
Then something is on pulling power from the battery. Check all lights and relays.
Check for loose or corroded battery terminalsReplace starter solenoidCheck neutral switch?
Yes, if your car sits a few days at a time and your cars interior lights periodically come on it will drain your battery.
take them out . you should charge battery then be ok.
Battery is discharged. Recharge the battery at a slow rate and reinstall.
Jump it, it will either start or it wont
Chances are that the battery does not have enough power to start the vehicle. The battery can be next to dead and the interior lights and some dash lights may come on, but a fully charged battery is necessary to start the vehicle. Have someone use a DC voltmeter to determine if you have the necessary voltage to start the vehicle. The battery should normally read 12.6 volts. If the vehicle has been sitting for a while, chances are it just slowly drained. This is called parasitic drain, and is usually a result of the clock keeping time, saving your radio station presets, etc. Normally, such a small parasitic drain does not affect the battery's ability to start the engine. However, if the battery was weak to begin with, then a minor parasitic drain could weaken the battery to the point that it cannot start the vehicle. First determine the current voltage of the battery. Determine how much voltage is currently in the battery (0v-12.6v). Try charging the battery and see if it holds the charge over the course of a couple days. If it does, then the battery probably has some life left in it. If it does not hold its charge very well, such as not even overnight, then you will definetily want to replace the battery as soon as possible. Hope this helps!
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If you keep the key on your ATV on for two days, the battery will probably go dead and need a charge or jump start.
hi it could be a dodgy altinator .start there