Hi friends. I sadly won't have an opportunity to drive my 991 C2S for the next 3-4 weeks. She currently resides at an apartment complex in a garage with no outside light or power outlets. Is there some relatively inexpensive way to attach a battery tender to the car without having an outlet handy?

Thanks!

 

You could disconnect the battery, not sure how it goes on the 991 but on older models make sure you have the radio code first

 

Maybe ask you local Porsche dealer to courtesy store it after you get it serviced?

Not ideal but an option and better than apartment complex....

 

Just leave it alone. Don't worry about it. Locked and alarmed, 4 weeks is nothing for a healthy battery.

 

^^^+1 Mine once sat for 7 weeks with no problem. (Business trip scheduled for 2 weeks which turned into 7)

 

Maybe your neighbor could take it for a long drive to keep the battery up?

 

Went 6 weeks no problem. Car was 3 months old at time. Dealer said after a certain amount of time it will go into "sleep" mode as long as remote is not used or activated during that time period. Came home and started right up.

 

3-4 weeks should be a non-issue for the battery.

 

Fully charge it before it sits.

 

Thanks everyone! Will take her for a long drive this weekend and then let her sit.

 

After driving a couple of hundred miles non stop and getting home my trickle charger shows approximately 65% charged more or less. A few miles to the store and when I reconnect the trickle it shows 80% range. I'm retired and don't know when I will be driving and I like a full charged battery. The main reason for this is to see if it gives more life to my battery. My battery is now 4 years old. I was surprised that I would lose a fair amount of power on short runs. This has been like this since the car was new. Not an issue with any electrical. I assume the alternator will supply enough power to run the vehicle but never keep a full charge. Opinions gladly accepted.

 

Back to the OP, I'm in a similar predicament. The parking space I own in a private garage lacks outlets. I just requested permission to install an outlet and included a sheet from Deltran which shows a tender's consumption of electricity is a fraction of what a 40 watt bulb uses.

A few spots away from my car is an owner-installed charging station for his Tesla so precedent exists.

 

My car always seems to be in the 66% charge range when I place a charger on it. Last week, I drove 1.5 hours, no A/C and daylight and the battery was indicating a 66% charge. One would think that the battery would be more charged than 2/3's. Frankly, I don't really understand how this system works.

 

I agree. Charged my battery last night to full with my tender. Went for drive this morning and volts were reading in the high 14 before coming down to around 12.8 - 13.5 after an hours or so. Switched to Sport, volt were back up to 14.8. Battery is not even 2 yrs old.

 

OP: as others said it will be fine, but if you want to be a little proactive, buy one of those $50 amazon special battery boosters, those portable battery packs that help you charge/start cars. So cheap nowadays.
Charge at home... Plug into your car the day before you go to give it a little boost? The take it off... recharge it at home, and have it ready when you get the car back, just in case...

I was really impressed, I had one of those things the size of a hard drive, only 55% charged because it sat in my trunk for months, and I was able to rescue a friend with a flat battery not once but twice on that low charge.. Those little gadgets are cool !