having an issue with my sisters car it has no power . when i jump start the car it runs perfect but the moment i tunr it off it has no power again . i dont know if the alternator is just not charging the battery or the battery is just no good anymore. its less thena year old and its a yellow top optima . i see some of you have had soem problems of them dying. i just recently fixed a problem with the alternator being loose . any other ideas i checked all the fuses and under the hood and inside maybe a relay or something .

 

take it out or drive the car to autozone, and they can test both batt and alt for free.

 

put a meter to the battery terminals and watch the readings. if the battery falls under 12.5 as soon as the car is turned off, then you need to charge and test the battery. take the battery out of the car and put it on a charger. then test it again. i had a yellow top go bad on my in 10 months...pissed me off.

 

i tried to charge the battery but my charger wouldnt charge it . and i took it to a kragen and they couldnt because they need a different type of charger. im gonna switch out my battery into and put that battery and mine and c if my car will charge it.i gota look for my receipt for it just in case i have to warranty that b*tch

 

buy a new battery???

 

does it die when you take the jumper cables off? try checking the alternator fuse before buying a new alternator. i had a similar problem on my old car and all it was was the fuse not the alternator itself.

 

no it didnt die when taking off the jumper cables.i put a meter to it and it was just barely over 10 anywho i just took it vic hubbards where i bought and they said it was too dead to test it and they are charging it for a few hours and calling me back when they test it i think its dead and they will replace it for me.

 

I think it might be more...less than a year is a short cry for a battery :-\ -- Even if it replaces and works fine, I would keep an eye on it..