Weak Battery

Try the tender I use it all the time. I use them to keep several batteries topped off for our toys. You may just need a deep charge cycle. If the battery is older then 3 years and a acid type replace it. Jersey winter summer cycles eat batteries, I know that from expeirance

I believe its a 34 series battery with reversed terminals. I been using oddesy batteries for the last 7-8 years. No acid, spill-proof and high quality.

If you change battery get in there and clean paint any corrosion you may see in the battery tray.

Hope this helps

 

Different between a 34 and a 34R is that the terminals are reversed on a 34R.

Anyway, your battery should not go dead in a week if the car is left unattended unless you have something drawing too much current. I generally disconnect the battery (with he switch under the front hood) if my car will sit more than a week. I have a 95 so I don't have the immobilizer and that may make a different.

I've had not problems in any of my 5 cars with regular batteries lasting at least 6 years. The Sears Diehard battery in my 308 is going on 12 years old with no problem. I disconnect it in fall for winter storage and in spring the 308 starts no problem without needing a charge. And that is in New England where the winters are probably a little harder than in NJ.

 

I actually swapped to the 34 not the "R" as I do not like how they have the positive terminal so close to the inside frame and went to a side mount along with a better mounting system (race style) If you take a look see you will see what I mean. I have broken the battery loose from the LA highway system.

Something to consider if your not in a rush

 

If I don't use the tender and don't drive for a weak, the crank is weak. Which reminds me, off to connect the tender now...

 

Is it a pain to use the disconnect switch on a 96 or later car? I always use it on my 95. Haven't seen any ill effects. When I want to drive the car I just reconnect, start the car and let the ECU relearn for 10 minutes or so.

 

I've disconnected (shut off) mine a dozen or more times with no ill effect (while working on the car) but it's easier to connect the tender

 

I am currently living in CA with the F355 in Texas. I can leave the car with the battery off for 3 months, come home, turn it on, key it on, wait 30 seconds for the servos to find their set points, crank it over and it runs just fine.

With the battery left connected I can only get 7 days from a long run to a dead battery. This has to do with the leakage of electrolytic capacitors uses extensively throughout the car slowly leaking (more and more) charge as they age.

 

I have a standard 34 battery. Not the r model. It fit just fine.

 

I last drove one week ago, did not connect tender until today (this thread). Went to start the car to wash it and no go. I washed DD instead. I'm sure it will be fine tomorrow morning.

 

Just curious, where to you connect your battery tender? Directly to the battery or in the back at the jump terminals, or does it make a difference (assuming the battery switch in in the ON position)?

 

Mine is connected to the battery but I don't think it matters, I've seen others in the back.

 

I don't think it matters where it is connected because many of these battery tenders include a plug to use with the cig lighter to charge.

 

I can leave the battery on mine for a few weeks with no charger & she starts ok.
As a habit now, I leave the tender on it during winter. Never a problem.
It's a Ferrari unit & connects at the left front fender.

IMHO - it's probably your battery. Interstates give me about 5 years & that's it. The dealer should be able to check it's status for shorts & such.

I'm not a fan of using the disconnect switch. I had it trash my alarm once already.

 

I tend to change mine out every five years, even if they're working well, just to avoid stress on the alternator (and driver).

 

Hi Bob,

Interstate has a few 34R's, if you can, please post the P/N of what you bought.

Thanks.

PS, the manual states: FIAMM 12V-70Ah-420A

 

I use the tender religiously.....
If the car is going to sit more than a few days, I plug it in....

My battery is 7 years old (gonna change it this summer just due to the age) and it still turns the car over on the first crank even if it had been sitting for a month or more....

 

Me too. But my battery is 12 years old ;(