Dead Battery

[Mitcheroo]

Not used my car for about 8 weeks and battery now dead as a doe doe. Can’t seem to charge it up. I have tried jump leads and tried connecting a battery pack to the battery to get some charge into it and then connecting battery charger but nothing. I appreciate when the battery is dead you need to try and get some power into it so the charger can work but can’t manage this. Anyone have any other ideas, or, do I need to replace the battery? Only got the car last March so would like to avoid a new battery if possible. I do have a tracker on it which stopped working.

 

[Beachbum]

From experience, once a battery dies, its never as good as it should be, ever again
Even if you can get this one working, I would suggest replacing it soon after, so maybe just better to get a new one now and avoid the hassle of getting the old one working
Obvious suggestion, get a trickle charger, horse bolted and all that, but at least should stop the next battery from dying

 

[Orchardbike]

I don’t want to hijack this thread, but what about changing it for a Li-Ion battery? I know it’s more money, but I fitted one to a Ducati and the charge lasted way longer than a lead acid. I could ‘overwinter’ my Ducati without having it on a trickle charger and it would fire up straightaway even after 4-5 months. The original lead acid needed charging every 4 weeks.

 

[Eagle7]

Not used my car for about 8 weeks and battery now dead as a doe doe. Can’t seem to charge it up. I have tried jump leads and tried connecting a battery pack to the battery to get some charge into it and then connecting battery charger but nothing. I appreciate when the battery is dead you need to try and get some power into it so the charger can work but can’t manage this. Anyone have any other ideas, or, do I need to replace the battery? Only got the car last March so would like to avoid a new battery if possible. I do have a tracker on it which stopped working.

Got this one for mine; plenty of power, don't need to keep it on a trickle charger. Plus it removes about 30 lbs from the back of the car. The 40ah is plenty, and it fits right into the factory mounts.

Antigravity T6/L2 Lithium Car Battery For Evora/Evora S/400/410/GT/Emira

A direct fit replacement lightweight battery for all 2009+ Evora's and 2022+ Emira! ONLY use a Lipo rated battery charger with these batteries or damage can occur. **We formerly offered the H6 group 48 size batteries for the Evora, it was reported that the H6 size was a snug/tight fit on some...

www.gregsraceparts.com

 

[Orchardbike]

Got this one for mine; plenty of power, don't need to keep it on a trickle charger. Plus it removes about 30 lbs from the back of the car. The 40ah is plenty, and it fits right into the factory mounts.

Antigravity T6/L2 Lithium Car Battery For Evora/Evora S/400/410/GT/Emira

A direct fit replacement lightweight battery for all 2009+ Evora's and 2022+ Emira! ONLY use a Lipo rated battery charger with these batteries or damage can occur. **We formerly offered the H6 group 48 size batteries for the Evora, it was reported that the H6 size was a snug/tight fit on some...

www.gregsraceparts.com

I’ll probably look at one of them as well, when my car’s back. How long have you left it without charging and it’s worked fine?

 

[Eagle7]

I’ll probably look at one of them as well, when my car’s back. How long have you left it without charging and it’s worked fine?

2 weeks or so?

 

[Orchardbike]

2 weeks or so?

Ah OK, so not a massive amount of time without being charged. My lead acid can last that long.

 

[Eagle7]

Ah OK, so not a massive amount of time without being charged. My lead acid can last that long.

Oh that's just how long it sat for me before I started it again. I don't know how long it would last.

 

[Mitcheroo]

Thanks for the ideas. Looks like a new battery just got to decide btw normal or lithium.

 

[Eagle7]

I put the battery on the charger when I first got it to make sure it had a full charge, but haven't used the charger since then. I received my car in early May last year. I only finally put it on the charger again about a week ago, only because it's too cold to drive it. Temps are down in the teens here at night with high's in the 30's (Fahrenheit or -9C to 1C) and I don't want to risk icy roads.

 

[Jinba ittai]

Thanks for the ideas. Looks like a new battery just got to decide btw normal or lithium.

100% I’m going lithium when my stock battery goes. The Emira came out heavier than I was expecting. 30 lbs is decent step in the right direction for not a lot of money

 

[Aero]

Did you put a multimeter on it to see if any volts? Sometimes trickle chargers wont charge a really flat battery if not over a few volts. A jump pack shouldve worked though so it may have internal continuity issues now. Remove from the car and use a good battery charger with a desulfating function if it has a few volts. Thats usually the only way to bring it back to almost good as new. Its possible its now degraded as mentioned though if wont come back to full capacity or be trustworthy in the Emira.
If its really dead you might try a warranty claim. It shouldnt be completely dead like that. The dealer will also have a fancy charger to test it out.