Hello from Plymouth in the UK .

I recently purchased a Continental GT Speed manufactured in 2013.

The car was supplied with a genuine Bentley battery maintainer.

When in use it is attached to the car by means of a magnetic disc which adheres to a slot in the boot lid.

The device runs through its cycle and eventually displays two green lights when in maintenance mode .

However , on several occasions I have returned to the car which is kept in a locked garage to find that the device is displaying one green and one red light . According to the instructions book from C Tek , this indicates a problem with polarity .

Anyone else had this ?

Does this indicate some sort of fault ?

 

this strange behaviours signal 2 options:

1. your battery is faulty and charging process fails occasionally - just need to buy new battery
2. smth wrong with your charger - try it on other battery and see if there are similar issues.

as a replacement of bentley charger you should go with ctek msx 7

 

I have the same charger for my '16 GT. Sometimes I have to press the reset button on the CTEK when the lights are incorrect and then it's fine for another few weeks. Try resting and see how it goes as a first step.

 

I have a 2006, in US. Somewhere I read here that both batteries were wired together so I charge the system (US on Drivers side) battery and both batteries have been fine. I am using a NOCO trickle charger. Fortunately I can garage this machine and when not in use it is on the charger. Batteries 2 years old, rarely have any problems with systems. I still swear that this machine is a power hog and really never sleeps and a fully charged system is one key to a low stress ownership. LOL

 

I agree with you. If I'm not planning on driving it for more than 2 days it goes on the charger. It's so easy on the Gen 2's that I almost do it automatically at the end of the day now. The Gen 2 charger has a magnetic disk that just sips into a slot under the trunk lid so it doesn't even need to be opened.

 

Gents, Thank you for mtaking the trouble to reply .
I think I've solved the problem by soaking a cotton wool bud with switch cleaner and cleaning the contacts on the charger , but more importantly the disc in the boot .
All connected up and haven't had a problem since .

 

Guess your charger and your car aren't faulty after all.

 

Thanks for the tip Tony! I hadn't given any thought to cleaning the contacts but it makes perfect sense since, even though sheltered by the boot lid, I'm sure dust and moisture accumulates on the contacts. I'll do it today!

 

Although I wasn't having any problems, I went ahead and cleaned them. Quite a bit of grime had accumulated under the lid so I'll add this to my maintenance list.

 

Well here's an interesting tidbit. Since getting the car 4 months ago, the green "maintain mode" LED indicator on the charger has never lit up. The best I've seen is the final stage "almost full" orange LED. A few hours after cleaning the magnetic disk under the lip of the boot lid the green LED finally lit up! Once again, thanks Tony, for solving a problem I didn't even know I had.

 

btw - i have ctek msx 7 - and have gt under charging for few days - mode AGM - the charging indicator is on top (battery full icon) - and it stays there - i put voltmeter today to battery and see 13.48v - so it means the charger is charging - do you know how the mtce mode works? it charges periodically on 13.5level then stops and after some time again 13.5? i just hit the moment of charging? not sure how this particular ctek model works - earlier i used different producer and there i saw dedicated light with mtce icon here there is no such direct indicator so not know if all ok or not and my bat is all the time on higher voltage

 

BruceR , Glad for you .
The very great benefits of a worldwide forum such as 6speedonline !

 

The full manual for your charger is here: https://docs.rs-online.com/b54b/0900766b81270566.pdf
When the circled LED below is on you're in maintenance mode.

 

ty - so in my case i never reach the maintenance mode - i never saw any pulsing diode

 

If your batteries are more than 3 years old it may be time to replace.