Ooops battery is drained - 986 Forum - The Community for Porsche Boxster & Cayman Owners

extanker · 06-10-2010, 10:19 AM

i say B[1] 75 $ BATT

extanker · 06-10-2010, 10:21 AM

are you near trenton ? i can give ya a jump

Perfectlap · 06-10-2010, 10:25 AM

No I'm on the Northern Jersey hemisphere.

Yeah, I'm leaning towards a Costco run. I love that place Wheaties Fuel big box for $2.99! But those battery packs look tempting. I hear mixed reviews on their ability to restart a fully drained battery though.

extanker · 06-10-2010, 10:29 AM

i went through 3 batt jumper pacts the only thing they ever started were motor cycles

Perfectlap · 06-10-2010, 10:50 AM

Yeah I can open the trunk. Which now makes me think the door wasn't fully closed and that killed the battery. The window wasn't lowered that little bit as it normally is, so the door won't fully close.

I keep one of those small glove compartment Black & Decker battery packs with the cigarette lighter plug in the rear cubby in the event the battery drains and the front truck won't release. It gives the car just enough juice to light up the dash to activate the trunk release but it won't turn over the engine. I just replaced the battery last year with a Duralast from Autozone.

Hmm....I don't think a jump start from another car is going to do the trick since the battery is fully drained. ARGHH...

mikefocke · 06-10-2010, 11:03 AM

run at 3k rpm for several minutes once hooked up before attempting to start yours. The idea is to partially charge yours, enough to lower the resistance so the jump can provide enough amps to get the car started. Once you are started, run for at least 30 minutes at 2k+ RPM. Then test voltage with a meter...or a battery tester. Why pay for a new battery when you might not need one.

Matt Fredrikson · 06-10-2010, 11:04 AM

oh it'll work you can get it started off a jump with no battery in the car and just clamping to the cables if you wanted the problem is you will destroy your alt in a hurry. Same applies to a dead battery, it'll work but it will take about 30 mins to charge your battery up to a usable charge but that will kill that alt quick. not worth it imo.

jcb986 · 06-10-2010, 12:00 PM

Get a 12V trickle charger for around $30...let charge for 8 hours.

Drained mine too, was able to unlock door with key and pop the hood, charged for 6 hours. Cranked one time and started.