battery drain

[one eyed mick]

A mate has had probs with battery drain if not using his Caterham for a while , any leads for a look , immobiliser etc, car is un modified and kept in warm dry garage has had a new battery comments please . discon battery is a choice as is batt isolator again comments please

[cyderbelly]

use what most bikers use a battery conditioning device. connect the lead to the battery and then plug your car in each time you don't intend to use it for a while. My zx6r bike is still running the same motorbike battery 13 years on!

like one of these

http://www.infinitymotorcycles.com/product/oxford-...

[sjmmarsh]

The battery on a 7 is only 35ah, so if you leave it for a month, a drain of 50mA will drain it completely. It will refuse to start well before that.

If you are leaving the car for more than 2 weeks it really needs to be on a conditioner like Optimate 4, or disconnect the battery.

Steve

[Benur]

Maybe a little stupid (newbie) question... Can't you disconnect the battery during these periods of "rest"?

Pardon my ignorance.

[one eyed mick]

thanks for various replies all good ideas but don't really cure any thing some thing is draining the battery . IS the a/thief system powered via ECU ? can it be disabled easily ? ,I suspect this is the prob K engine ,alarm imobiliser from new i.e. factory fit more ideas please

[Aeroscreens]

I can't help with your specific problem i.e. factory fitted/K-series, but my after market immobiliser draws enough current to drain the battery in 2 weeks. I was told by the manufacturer that when the immobiliser is 'armed' it is constantly looking for the signal to 'disarm' it (not sure if that is true or not, but kind of makes senses)

During the winter I will probably unravel all of the wiring and pass the immobiliser through the battery cut-off switch so that once the master key is removed there is no drain on the battery. However, you must wait the relevant amount of time for the immobiliser to 'arm' itself before removing the master switch as I understand that if the switch is removed before that then the immobiliser will not be 'armed'. At the moment I use a battery conditioner.