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Registered
Join Date: Jun 2001
Location: Lake Oswego, Oregon
Posts: 874
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Optima recharge
My 73 911 has two Optima six volt batteries. Seems that I have neglected to startt the car often enough, they are both dead.
What do I need to do to recharge them or get the car running?? Thanks Craig
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Craig C. Laughlin CAMP 914 Helping to bring your 914 into the 21st century. http://www.camp914.com |
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06-16-2004, 08:29 PM
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I'm off the hook.....
Join Date: Oct 2001
Location: 22 miles south, then 11 miles west of LAS
Posts: 2,895
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When dead, they seem to like to be zapped. High rate of charge to start, then a full charge at normal rate. If they are going to come back, that is it. I watched a shop put 70 amps into it for 15 minutes, then normal rate 25 amps for another hour or so.
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No, I don't sing. Based there for too long. |
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06-16-2004, 08:48 PM
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,189
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A battery charger?
I've let a (single 12v) optima run down (winter/alarm - combo) I recharged, (trickle charger) no problems . .. even years later . ...its been a great battery.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee. 
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06-16-2004, 08:50 PM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
Posts: 16,492
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While Island was successful using the standard recharge method, I too have had some problems recharging an Optima battery, as have others on this board. The consensus here is to treat the Optima like a deep cycle battery in that you put the charger on the "start" mode which puts the highest amps available from your charger into the battery for around 10 minutes then go back to the regular 10 amp charge mode. Do not select the deep cycle mode on your charger.
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Kurt V No more Porsches, but a revolving number of motorcycles. |
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06-17-2004, 05:15 AM
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Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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Needs high rate of charge at first ( as stated) ...and can go lower rate or even trickle charge toward the end.
--Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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06-17-2004, 05:53 AM
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Registered
Join Date: Aug 2001
Location: Belton, Texas USA
Posts: 54
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How long can one sit discharged before being brought back to life like this? I've let mine Optima discharge and it won't come back to life on a 10 amp setting.
 Mark |
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06-17-2004, 02:25 PM
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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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Quote:
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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06-17-2004, 08:47 PM
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Registered
Join Date: May 2004
Location: washington,DC
Posts: 1,087
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this is a good post,l`ve had several of these batteries and l just today exchanged a bad one under warranty.The tech at Batteries Plus stated that the Optima responds best to an initial shock,then a charge for up to three days.He said he`s had some that may test bad initially but they`ll come back on after a long charge and be good as new.Personally l like the batteries but l`ve had two bad ones so far...
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my life begins at 150MPH |
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06-17-2004, 10:30 PM
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Registered
Join Date: Apr 2003
Location: Florida
Posts: 1,216
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I find it is hard to bring the Optima battery back from dead with a regular charger. I use jumper cables on my wife's van and let it run for a while this brings them up enough for the regular charger to take over to top them up.
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Work to Live, don't live to work... |
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06-18-2004, 07:56 AM
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