SoCalSGT Posted May 10, 2019 Report Share Posted May 10, 2019 So...I keep a trickle charger on my battery when I'm not driving the Shelby. It has always done a great job of keeping the battery topped off. Now, however, the charger is indicating the battery is bad. I suppose that's possible since it's 8 years old. Now here's the two part question; what is the best replacement battery, and can I leave the trickle charger connected while replacing the battery so nothing in memory is lost? Thanks for your thoughts and advice. Quote Link to comment Share on other sites More sharing options...
twobjshelbys Posted May 10, 2019 Report Share Posted May 10, 2019 (edited) Yes and yes. my fird gt did the same thing. the battery was 7 years old but the tender indicated it wasn't topping off. the gt has a factory render that plugs in to the cigarette lighter and the tender held the emissions settings. Keeping one on the battery terminals with all the jostling around seemed problematic, so I'd wrap it on with electrical tape to be sure they don't pop off (or maybe your arrangement is on the screw terminals which may also be loose). Just be careful to keep the positive terminal well insulated so it doesn't short to ground with the tender attached. Edited May 10, 2019 by twobjshelbys Quote Link to comment Share on other sites More sharing options...
SoCalSGT Posted May 10, 2019 Author Report Share Posted May 10, 2019 Perfect, thanks! Quote Link to comment Share on other sites More sharing options...
SoCalSGT Posted May 10, 2019 Author Report Share Posted May 10, 2019 Any preference on battery? Quote Link to comment Share on other sites More sharing options...
mhr1961 Posted May 10, 2019 Report Share Posted May 10, 2019 (edited) I got almost 6 years out of my OEM battery. If you got 7 years out of the OEM battery then why switch to a different Brand? Go back with the Motorcraft. Edited May 10, 2019 by mhr1961 Quote Link to comment Share on other sites More sharing options...
twobjshelbys Posted May 10, 2019 Report Share Posted May 10, 2019 I have no real allegiance to the factory on batteries. In my case I was locked to an Optima - the Ford GT battery is a rebadged Optima, I wanted Ford but the dealer didn't have one so I just got the Optima equivalent. But in Vegas we go through batteries like some people go through underwear - my new Honda just got two years even parked inside. Quote Link to comment Share on other sites More sharing options...
SoCalSGT Posted May 11, 2019 Author Report Share Posted May 11, 2019 Good points, thanks for the input. Quote Link to comment Share on other sites More sharing options...
Don Johnston Posted May 11, 2019 Report Share Posted May 11, 2019 My first Motorcraft battery on the 2011 failed within a year and was replaced with another Motorcraft which lasted until last year. I replaced with a NAPA unit (not sure who the manufacturer is) with the highest cranking power size and no problems. It seems to last many weeks longer than the Motorcraft without failure from lack of trickle charger or running the car. Quote Link to comment Share on other sites More sharing options...
SoCalSGT Posted May 11, 2019 Author Report Share Posted May 11, 2019 6 minutes ago, 66GT350PS said: My first Motorcraft battery on the 2011 failed within a year and was replaced with another Motorcraft which lasted until last year. I replaced with a NAPA unit (not sure who the manufacturer is) with the highest cranking power size and no problems. It seems to last many weeks longer than the Motorcraft without failure from lack of trickle charger or running the car. Thanks, appreciate the info. Quote Link to comment Share on other sites More sharing options...
shel-b001 Posted May 11, 2019 Report Share Posted May 11, 2019 2007 GT 500 still running the original battery no problems yet but not expecting another year we will see . I have stock with Motorcraft batteries as I have good life out of all that I have had. Quote Link to comment Share on other sites More sharing options...
SoCalSGT Posted May 12, 2019 Author Report Share Posted May 12, 2019 13 hours ago, shelby001 said: 2007 GT 500 still running the original battery no problems yet but not expecting another year we will see . I have stock with Motorcraft batteries as I have good life out of all that I have had. No that's a long run! Yep, gonna' swing by the dealer in the morning and pick one up. No reason to change that I can see. Thanks. Quote Link to comment Share on other sites More sharing options...
shel-b001 Posted May 12, 2019 Report Share Posted May 12, 2019 3 hours ago, SoCalSGT said: No that's a long run! Yep, gonna' swing by the dealer in the morning and pick one up. No reason to change that I can see. Thanks. Make sure you get the right size that fits your battery tray if its an 07-09 there are two BXT 96R , & BXT 40- R the lengths are different & also C.A is different Quote Link to comment Share on other sites More sharing options...
SoCalSGT Posted May 12, 2019 Author Report Share Posted May 12, 2019 Nope, this is the 2011. Believe it depends on the motor what size battery it is. Thanks, though. Quote Link to comment Share on other sites More sharing options...
SoCalSGT Posted May 13, 2019 Author Report Share Posted May 13, 2019 R&R done! Piece of cake. Amazing how they know exactly how many months to warranty the darn things. Quote Link to comment Share on other sites More sharing options...
kyarnelli Posted May 14, 2019 Report Share Posted May 14, 2019 I just replaced my original battery from 2011 this week. The motorcraft battery lasted longer than any battery i ever had. So im going to stick with motorcraft. Quote Link to comment Share on other sites More sharing options...
SoCalSGT Posted May 14, 2019 Author Report Share Posted May 14, 2019 9 hours ago, kyarnelli said: I just replaced my original battery from 2011 this week. The motorcraft battery lasted longer than any battery i ever had. So im going to stick with motorcraft. As did I. Hard to complain about that lifespan. Quote Link to comment Share on other sites More sharing options...
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