Battery conditioner

[Dougieboy1]

I have a stupid question that demonstrates my lack of electrical understanding but humour me!.

I am planning to use a ctek battery conditioner on the 911. Do i need to add a charging connection to both batteries or is attaching it to one battery sufficient to keep both in condition?

Thanks

Andrew

[redrobin911]

In theory just one as both postives are connected. Red to positive, and black to earth on the car i.e. ground, I beleive not to the negitive on the ( or a ) battery. I'm not an expert but that's what I think it is, only time you connect to the negative is when the battery is out of the car. This will work, whether or not its the "best" way others will no doubt chirp up.

[hot66]

Just to one... the battery conditioners ‘permanent plug in connector is designed to be fitted to + and - battery clamps

[Dougieboy1]

thanks both - ctek on order!

[redrobin911]

thanks both - ctek on order!

Top tip the £14 ones from LIDL to the same job if you can find one....

[Dougieboy1]

thanks for the tip robin!