avi8tir

Which one does everyone use? Is the porsche version sold my suncoast any good?

http://www.suncoastparts.com/product...T3INTERIORELEC

Mike in CA

The Porsche charger is made by CTEK. You can buy a CTEK charger without the Porsche logo on Amazon that has more features, including a mode designed for the AGM battery in the GT3 which the Porsche branded model doesn't have. Add a cig lighter adaptor and you will have the option to plug into a 12V outlet or connect directly to the battery. Total cost will be about $35 less than the Porsche charger alone.

http://www.amazon.com/CTEK-56-158-1-.../dp/B000FQBWCY

http://www.amazon.com/CTEK-56-263-Co...WBY330CT4DDYH3

avi8tir

thanks! order placed!

Jimmy-D

Mike - I do not understand. So the Porsche charger that I have been using does not work??. All the lights seem to be functioning properly.

seapar

So for the new 991gt3 we should run in snowflake mode because of the agm battery ? Even in mild climates when car won't be used for 2 wks or so?

shapiroeric

Yes....I run snowflake mode all the time....the mode is specific for cold temps and AGM batteries....

SmokinGTS

Remember guys if you go direct to the battery you need to use the NEG- ground post not on the battery. I know some guys like to use the pigtails.

Mike in CA

Jimmy it works fine. Supposedly the AGM battery in the GT3 requires (prefers?) a slightly higher charging voltage. The CTEK branded charger has what's called a "snowflake" mode for cold weather that meets that requirement. The Porsche branded CTEK charger doesn't have the same mode. I doubt it makes a big difference, and I wouldn't trade yours in, but if one was buying a charger from new like the OP one might as well get the one with the optimal charging mode.

Mike in CA

Generally true, but according to CTEK it's safe to connect their chargers directly to the NEG post on the battery. The only reason they don't officially recommend it is for approval reasons. From their website:

Why do you have to connect negative to ground and not to the battery?
A. All CTEK chargers observe the directives that apply in the EU. All battery chargers whatever the brand must be approved in line with the same standards. Many more basic chargers can cause the battery to emit a significant amount of oxy-hydrogen gas and also generate a spark when connecting. This represents a major risk of injury and it is therefore stipulated that the first terminal should be connected away from the battery in order to reduce the risk. A CTEK charger is spark free, has a minimal amount of gassing and can therefore be connected directly to the battery. However, we do not recommend this for approval reasons.

Jimmy-D

^^Thanks. Boy would I be pissed if it was not working and the battery went dead. I have to believe it is an expensive battery to replace.