Trickle charger

Chassey · 17 Feb 2025

Hi everyone
I have just bought a 991.1 C2S which I love.
But I went away for about 10 days recently and when I came back and started the car the low battery warning light came on.
Should the battery discharge that quickly?
I am going to buy a ctek charger but I would expect the charge to hold for longer than 10 days!

Alex · 17 Feb 2025

Freezing weather will be the main culprit of the battery drain. If it's been parked up in the 1st place not fully charged (quite usual at this time of year) that won't help either. You may also have a drain on the battery somewhere, or battery is getting old.

TonyC911 · 17 Feb 2025

Congrats on your purchase! Photo's are mandatory BTW!!

It's a common issue with lack of use. Ctek is a good choice. It may be able to revive it.
How old is the car & battery?

Chassey · 17 Feb 2025

Alex said:
Freezing weather will be the main culprit of the battery drain. If it's been parked up in the 1st place not fully charged (quite usual at this time of year) that won't help either. You may also have a drain on the battery somewhere, or battery is getting old.

Thanks, it has been very cold as I live in Scotland though the car is garaged.
I will give it a good drive at the weekend for a proper charge. Gives me an excuse for a proper spin!

Chassey · 18 Feb 2025

Thanks! Loving the car! It’s a 2013 with aero kit and also has factory fitted Porsche power kit.

TonyC911 · 18 Feb 2025

Very smart and great spec! Enjoy!

Luddite · 18 Feb 2025

Welcome to the forum Tony, If your battery is original to the car, chances may be that it might be thought worthwhile to have a replacement coded in... My battery at 9 years old and circa 40k miles failed to fire up the car after 8 days, when I had forgotten to connect up my Ctek when I parked it up ..!
with your battery being an AGM type, (?) A CTEK MXS 5.0 should do the trick.... As best I understand it, a trickle charge is a constant low current charge, whereas a float charge automatically alters it`s current relative to the battery`s needs.

Batteries can last a lot longer than 10 years however if it has ever been allowed to loose almost all charge at any time during it`s lifetime it`s ability to hold a charge can be reduced considerably...

Best of luck with your choices..

cableguy · 19 Feb 2025

Get a Ctek, job done.

E

Thread 'Connecting C-Tek Charger'

3 Jan 2025

Hi All,

I want to connect this connector to my 991.
Is there a specific sequence that I need to follow to connect to the positive and earth terminal as I don't want to screw the ECU.
I'm pretty sure that I can connect it without disconnecting either terminals of the battery, but just want to be sure that I'm not doing something really dumb.

Thanks

C.