Going to bump this thread since im sort of having the same issue..

My s2000 became my 2nd car a few months back and now I only drive it on the weekends. Well about 2 months ago I didnt drive/start it for 3 weeks. I knew id come back to a dead battery no biggie. Jump start it drive it about 20 min on the freeway. When I arrived to my destination the car wouldn't start back up. The battery was about 2 years old so I just had it replaced.

All was well for about 2 weeks.. now the same thing again. Did a voltage check with the car at idle and it was at 14.0

Any ideas guys?

 

Sounds like a battery. Modern batteries, for whatever reson, suffer occaisional damage if drained completely.

 

wow really? Its a interstate battery I guess il just having it replaced and hope for the best.

Thanks

 

sulfation?

 

Car batteries are not designed to be "deep cycle" batteries (those that can be fully discharged before being recharged). I also have found that several weeks of "no attention" can fully discharge the battery. There seems to be a constant drain of about 30-40 milliamps - that's nearly 8 amp-hours per week (OEM security system - might be more if you have aftermarket electronics), so you will need a trickle charger to prevent full discharge if you're going to leave it for weeks at a time.

BatteryMinder is a trickle charger that is specifically designed to de-sulphate lead acid batteries. They claim to nearly double the normal life of batteries. I haven't used it long enough to know about that, but it does work well as a trickle/maintenance charger.

 

Good idea, il pick up trickle charger as well.. its a real downer when you go to have some fun in the S2k and it wont start

 

which is the best car?Thanks

 

S2k of course. That's why you're on this forum.

With 35 posts on your first day, troll?

 

A little update.

So i picked up a Schumacher Sc-1000A which is a charger/maintainer.

I know my battery was completely dead and this may not bring it back but I decided to give it a shot anyway. It had been on charge for about 9 hours and to my surprise the gauge read that it was 75 percent charged. Once it reaches 100 percent it should switch to maintenance mode and hopefully I dont have this issue again.

 

A long, slow charge is the best way to recover a battery. It sounds like you're on the road to recovery. Good luck.

The test of the battery is whether it keeps voltage up while being discharged. If you have the battery fully charged, engine off, headlights on, and it stays above about 12.75v for several minutes, then the battery is probably OK. If the voltage drops faster, then you might need a new battery.