So is my battery dead? 996 Turbo...
Discussion
Has anyone tried one of these, as a preventative measure for future battery drains, without use of garage or near plug point...
http://www.design911.co.uk/fu/pt259_261_-cma81-cmo...
http://www.design911.co.uk/fu/pt259_261_-cma81-cmo...
Greg66 said:
dank said:
So after having to jump the car a few times with the jump pack, am i doing myself no favours, is it time for a new battery?
Yes, new battery time. They don't last forever.
These cars are known for heavy idle drain.
If you have left it standing for 10 days or more you can expect to find a flat battery.
Even if the battery is brand spanking new. So if this is the case then don't buy a new battery just yet.
I can't say it's supposed to be that way, but mine and many others on here it seems, do that.
Disconnect the battery if you are not going to be using the car for over a week. And immediately if you are going to leave the car unlocked in your garage, this will flatten it in a few days.
If your battery goes flat I would advise charging it up properly, not just going for a short drive after jumping it.
dank said:
Has anyone tried one of these, as a preventative measure for future battery drains, without use of garage or near plug point...
http://www.design911.co.uk/fu/pt259_261_-cma81-cmo...
I take it you think you plug one of those into the cigarette lighter to charge your own battery!!! http://www.design911.co.uk/fu/pt259_261_-cma81-cmo...
NO YOU CAN'T!!!
The battery CHARGES via the cigarette lighter, and you need to PLUG IN the charger into a wall socket...!
And if you do buy a battery charger you don't buy a Porsche one, it's like buying Porsche air to fill your tyres with... you go to Halfords or anywhere and buy one for <£20, not friggin' £83!!!!
Edited by 996TT02 on Sunday 23 March 13:42
996TT02 said:
dank said:
Has anyone tried one of these, as a preventative measure for future battery drains, without use of garage or near plug point...
http://www.design911.co.uk/fu/pt259_261_-cma81-cmo...
I take it you think you plug one of those into the cigarette lighter to charge your own battery!!! http://www.design911.co.uk/fu/pt259_261_-cma81-cmo...
NO YOU CAN'T!!!
The battery CHARGES via the cigarette lighter, and you need to PLUG IN the charger into a wall socket...!
996TT02 said:
Not necessarily.
These cars are known for heavy idle drain.
If you have left it standing for 10 days or more you can expect to find a flat battery.
Even if the battery is brand spanking new. So if this is the case then don't buy a new battery just yet.
I can't say it's supposed to be that way, but mine and many others on here it seems, do that.
Disconnect the battery if you are not going to be using the car for over a week. And immediately if you are going to leave the car unlocked in your garage, this will flatten it in a few days.
If your battery goes flat I would advise charging it up properly, not just going for a short drive after jumping it.
Fair comment. I had assumed from the absence of any complaint that the battery was new to new-ish that it was getting on a bit. These cars are known for heavy idle drain.
If you have left it standing for 10 days or more you can expect to find a flat battery.
Even if the battery is brand spanking new. So if this is the case then don't buy a new battery just yet.
I can't say it's supposed to be that way, but mine and many others on here it seems, do that.
Disconnect the battery if you are not going to be using the car for over a week. And immediately if you are going to leave the car unlocked in your garage, this will flatten it in a few days.
If your battery goes flat I would advise charging it up properly, not just going for a short drive after jumping it.
For me the tell tale sign on is that the car starts throwing an ABS and/or traction control warning light when it is started from cold, within the first minute or so. AIUI these are quite power hungry systems, so a weak battery will trigger a fault light. The light then typically doesn't re-appear until the next time the car is started from cold, and so on. Had this on the turbo, and also on the A8 and the RR (which also lobs in transmission/HDC error messages for good measure). New battery = problem solved.
dank said:
I didn't think the cigarette lighter Porsche thing charges the battery, but it keeps the battery from draining if the car is left for long periods?
If I disconnect the battery in order to charge, will it bugger up the alarm / immobiliser etc, ?
nope car will remain fine if you remove battery If I disconnect the battery in order to charge, will it bugger up the alarm / immobiliser etc, ?
dank said:
I didn't think the cigarette lighter Porsche thing charges the battery, but it keeps the battery from draining if the car is left for long periods?
NO! Where do you think the power to the cigarette lighter comes from? Marlboro Country?dank said:
If I disconnect the battery in order to charge, will it bugger up the alarm / immobiliser etc, ?
No, but you just leave the key in position 1 (i.e. first click of rotation) otherwise the alarm goes off when disconnecting (and leaves you with temporary deafness since you would usually have your head within 2 feet of the siren, just by the battery...)You can remove the key after the battery is disconnected.
Don't forget to leave the drivers side window slightly lowered due to the seals, and DON'T close the bonnet... unless you keep the booster pack handy.
ok thanks, i'll have to totally remove the battery in order to charge it at my friends house overnight, 12 hours is the charge time isn't it?
i'll use jump pack to open the bonnet when replacing the fully charged battery, as can't leave it open in a private car park!
pain in the bum all this....
i'll use jump pack to open the bonnet when replacing the fully charged battery, as can't leave it open in a private car park!
pain in the bum all this....
I always use a C-Tek trickle charger (similar if not exactly the same as the Porsche version) plugged into the cigarette lighter to maintain the battery when the car is in storage. Even after a month the battery has always been charged using this method.
Recently though the battery has deteriorated to the point where it wouldn't hold a charge for more than few hours. Having inspected it, it looked like it was the original Porsche battery from 10 years ago !!
Got a new Bosch Silver series battery and the car is as good as new. I used the trickle charger to maintain power to the car's electrics and memory through the cigarette lighter socket whilst changing out the battery.
The trickle charger though is fantastic. I used it before on an old W124 mercedes battery that had gone flat. Left it overnight and it reconditioned the battery to like new and it never gave a problem again.
I would always caution against jump starting a modern car. The mass of electronics in new cars can be quite sensitive and large amounts of current could damage the car's ECU
Recently though the battery has deteriorated to the point where it wouldn't hold a charge for more than few hours. Having inspected it, it looked like it was the original Porsche battery from 10 years ago !!
Got a new Bosch Silver series battery and the car is as good as new. I used the trickle charger to maintain power to the car's electrics and memory through the cigarette lighter socket whilst changing out the battery.
The trickle charger though is fantastic. I used it before on an old W124 mercedes battery that had gone flat. Left it overnight and it reconditioned the battery to like new and it never gave a problem again.
I would always caution against jump starting a modern car. The mass of electronics in new cars can be quite sensitive and large amounts of current could damage the car's ECU
dank said:
ok thanks, i'll have to totally remove the battery in order to charge it at my friends house overnight, 12 hours is the charge time isn't it?
i'll use jump pack to open the bonnet when replacing the fully charged battery, as can't leave it open in a private car park!
pain in the bum all this....
Just be careful with the windows and the seals when you open the door, the glass won't retract, but unfortunately you don't have the option to leave the glass down in a car park... unless you cover the car, or unless the car park is secure enough and covered.i'll use jump pack to open the bonnet when replacing the fully charged battery, as can't leave it open in a private car park!
pain in the bum all this....
Spy said:
I would always caution against jump starting a modern car. The mass of electronics in new cars can be quite sensitive and large amounts of current could damage the car's ECU
Misconception.The current draw comes from the devices, not from how much current potential there is at the source. Current flow is a function of the resistance of the devices and the voltage across them.
Increased voltage increases current, but jumping does not increase voltage above normal at all, the voltage you get is the same as the booster battery's voltage. (actually slightly less, as your dead battery charging would cause a voltage drop).
Consider that the same 12v nominal battery capable of cranking the starter motor and providing enough current that some people use it to weld with for short periods of time, is directly connected to the teeny little bulbs that light up your instrument display, side lamps, radio, and everything else.
And at home, your TV, phone charger, etc, is directly connected to a 2.5mm sq cable that can easily supply a whopping 30 Amp plus for short periods, again almost enough to weld with. And that in turn, is via some devious route probably connected to the nearest nuclear power station in France...
Gassing Station | Porsche General | Top of Page | What's New | My Stuff