How long will battery last?
Discussion
You could work it out if you did a parasitic drain test which is quite simple.
I would guess at around 2 months.
A disconnect switch would be better, the Ecu can be powered down but will require some time when the car is restarted to re learn values but this doesn't take long.
It may run a little lumpy while it does this.
I would guess at around 2 months.
A disconnect switch would be better, the Ecu can be powered down but will require some time when the car is restarted to re learn values but this doesn't take long.
It may run a little lumpy while it does this.
If its a decent battery and you give it a good charge before winter storage then it should last through the winter without trouble.
The battery in my Griffith is 14 years old and is always disconnected when garaged. No problems when left from November to March. It has always started the car first time when connected up in March/April. If you leave the immobiliser/alarm still conneted then it would require frequent charging.
The ECU sorts itself out after a few minutes when first connected.
The battery in my Griffith is 14 years old and is always disconnected when garaged. No problems when left from November to March. It has always started the car first time when connected up in March/April. If you leave the immobiliser/alarm still conneted then it would require frequent charging.
The ECU sorts itself out after a few minutes when first connected.
Mine lives outside, so has to be locked and alarmed.
First time I went on holiday and left it for 10 days, the day we returned it started wailing like a dying seal as the alarm had reverted to backup battery.
So I bought a trickle charger, and have had it hooked up ever since.
Then I discovered a hot-start-mod relay (a bit of a homemade version) that was always warm, and established that it had been wired to be permanently energised from the battery. After some extremely helpful guidance on here, I connected it up the right way, the relay stayed cool. I had inadvertently discovered a major drain on the battery.
I then replaced that whole area of wiring with an uprated wiring and relay (and a new thicker starter feeder cable, and added an extra earth from battery direct to the engine block), and I have so far tested it for a week and seen almost zero drop in battery voltage. I keep it plugged in during very cold weather to help maintain the battery because it's outside.
Might just be something to try out, see if there is a drain, potentially solve it, and maybe buy a Battery Brain to disconnect neatly.
I can't do this, as if I disconnect the positive on the battery, the alarm goes off.
First time I went on holiday and left it for 10 days, the day we returned it started wailing like a dying seal as the alarm had reverted to backup battery.
So I bought a trickle charger, and have had it hooked up ever since.
Then I discovered a hot-start-mod relay (a bit of a homemade version) that was always warm, and established that it had been wired to be permanently energised from the battery. After some extremely helpful guidance on here, I connected it up the right way, the relay stayed cool. I had inadvertently discovered a major drain on the battery.
I then replaced that whole area of wiring with an uprated wiring and relay (and a new thicker starter feeder cable, and added an extra earth from battery direct to the engine block), and I have so far tested it for a week and seen almost zero drop in battery voltage. I keep it plugged in during very cold weather to help maintain the battery because it's outside.
Might just be something to try out, see if there is a drain, potentially solve it, and maybe buy a Battery Brain to disconnect neatly.
I can't do this, as if I disconnect the positive on the battery, the alarm goes off.
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