992 Questions - Trickle Charger / Sport Chrono

[bennno]

Two queries

1. I’m finding my 992 seems to power down fully disconnecting the cigarette lighter socket in the passenger footwell and then the Porsche trickle charger can’t charge it, as anybody found a way round this?

2. How do you get the sport chrono dial on the top of the dash to do something? I’ve got a chrono setting on pcm with a digital lap timer but the dial on top of the dash seem to do nothing?

[DC1960]

1. CTEK charger connected direct to battery and extension cable popping out by bottom of windscreen.

Rennlist has a thread on it here:

https://rennlist.com/forums/992/1182248-992-trickl...

[G-996]

I researched this a lot, and concluded there was no 100% reliable way of charging through the cigarette lighter, so I charge under the bonnet to the ground post and battery positive terminal.
Also just in case you haven’t done this already, remove the plastic trim panel in the frunk to look at the battery and check if it is Lithium or AGM (Lead). My OPC confidently told me I had a Lithium battery in my 992, when I looked I had an AGM. They require different chargers.

[bennno]

G-996 said:

I researched this a lot, and concluded there was no 100% reliable way of charging through the cigarette lighter, so I charge under the bonnet to the ground post and battery positive terminal.
Also just in case you haven’t done this already, remove the plastic trim panel in the frunk to look at the battery and check if it is Lithium or AGM (Lead). My OPC confidently told me I had a Lithium battery in my 992, when I looked I had an AGM. They require different chargers.

It’s a 992T and I’m told it’s Lithium, but I’ll check that.

[Stanley Rous]

I have the Lithium batter and have the lithium ctek charger connected directly to the battery and been faultless for the last couple of years. Connected the eyelets to the battery and just plug in the connector when required.

Looks to be £125 from Amazon at the moment “CTEK Lithium XS UK Vehicle Battery Charger 40-003 - For Lithium (12V LiFePO4) Batteries - UK Plug, Black”.

Re sports chrono, use the right scroll wheel to select sports chrono and then press the scroll wheel to select and start/finish.

[lowndes]

If you have a socket in the passenger footwell then this procedure may work.

Plug charger into footwell socket but don’t switch on at the mains.

Switch on ignition so dashboard fully lights up.

Switch on charger at the mains.

Leave it for a minute or so.

Switch off ignition, lock car.

The charger should continue to work but you might come back in an hour or so to check.

[Blue62]

I’ve been using my T pretty regularly and experienced no problems, however I’m away for three weeks soon, should I get a trickle charger?

[forest172]

lowndes said:

If you have a socket in the passenger footwell then this procedure may work.

Plug charger into footwell socket but don’t switch on at the mains.

Switch on ignition so dashboard fully lights up.

Switch on charger at the mains.

Leave it for a minute or so.

Switch off ignition, lock car.

The charger should continue to work but you might come back in an hour or so to check.

I find this works but I don’t lock the car. If I turn on when I’ve turned ignition off but left it in for a minute it times out.

Edited by forest172 on Friday 19th July 07:51

[gregd]

Blue62 said:

I’ve been using my T pretty regularly and experienced no problems, however I’m away for three weeks soon, should I get a trickle charger?

I've left mine over a month and it was fine

[Blue62]

gregd said:

I've left mine over a month and it was fine

Thanks

[bennno]

gregd said:

I've left mine over a month and it was fine

Ive done the same although it was then 1 dot when I plugged the charger in, conscious the li-ion batteries are about £1k from Porsche....

[mikef]

DC1960 said:

1. CTEK charger connected direct to battery and extension cable popping out by bottom of windscreen.

This. And an extra-large Remove Before Flight Banner attached to the cable so I don’t try to drive off with the charger cable attached

[RickA911]

lowndes said:

If you have a socket in the passenger footwell then this procedure may work.

Plug charger into footwell socket but don’t switch on at the mains.

Switch on ignition so dashboard fully lights up.

Switch on charger at the mains.

Leave it for a minute or so.

Switch off ignition, lock car.

The charger should continue to work but you might come back in an hour or so to check.

This exact procedure works for me. I have a MY23 992C4, a Porsche-branded CTEK charger and an AGM battery. I use the socket in the passenger footwell with the cable running under the closed (and locked) passenger door. Left the car for 3 weeks in my garage charging like this whilst on holiday and all absolutely fine. Only issue if you’re away is if the power supply is interrupted - even if it's then restored the charger won’t reset.