batteries for a 1970 911t

bozboorer · 06-15-2009, 05:18 AM

Hello all,
would you advise any good supplier for getting two new batteries for my 1970 911T? What are the price ranges for these?
Thanks a lot
regards
Boz

jlandreth · 06-15-2009, 05:33 AM

I got a pair from the local dealer.I believe it's an Interstate U 911.They were about $90.00 each

bozboorer · 06-15-2009, 05:56 AM

Thanks a lot! Where these for a 70 911T too?
thanks
regards
Mat

jlandreth · 06-15-2009, 06:04 AM

My car is a 69T but the batteries are the same for both years.

bozboorer · 06-15-2009, 06:07 AM

thanks a lot for your advices.
regards
Mat

69911e · 06-15-2009, 06:34 AM

Best way to save money (and weight) is to only use one battery.
I have use the interstate U911 for years with only one battery. No problems starting, but you must remember to disconnect the second battery cable from the clamp.

cnielsen · 06-15-2009, 06:40 AM

Sonnenschein makes great replacement batteries...do a search and you should find some purchasing info They are an exact replacement size and I believe they are a dry cell battery so the worries of them causing rust are minimized. Have had my set for about 2 years and they have been great.

bozboorer · 06-15-2009, 06:41 AM

Hi, do you mean the interstate u911 is a 12v?
thanks again
Mat

911s55 · 06-15-2009, 06:44 AM

Ditto on the Sonnenschein, the model for '69-'73 is the DF 75.

http://www.batterysales.com/sonnenschein_prevailerger.cfm

bozboorer · 06-15-2009, 07:06 AM

Thanks all for your advices. Would a pair of Interstate u911-50 be the cheapest solution?
Thanks a gain
mat

HarryD · 06-15-2009, 03:11 PM

The cost of a lead acid battery is less until you consider the cost of a front suspension pan replacement from a boiled over or cracked battery.

From another post (http://forums.pelicanparts.com/porsche-911-technical-forum/479604-duel-battries-post4717642.html?highlight=optima#post4717642):

Quote:

Originally Posted by HarryD

Paul is correct, Sonnenschein is the way to go to keep the factory set up. You will need their DF75 (A512 /40 A) gel cells - www.batterysales.com.

An alternative is go with a single Optima on it's side in one of the boxes and disconnect the excess wire.

Also, you can get the exact fit lead acid style ones from your Porsche dealer (http://www.porsche.com/canada/en/accessoriesandservices/classic/genuineparts/neweditions/). Look for: "Battery 12V 36Ah for the 911, Model: 911, Model Year: 1965-1973, Part number: 999 611 014 91, Availability: 01.03.2009". Pelican lists them at $189/ea and a special order.

Here in the states, an Interstate Battery U911 is also an exact fit.

There are other soptins such as Miata, Oddessy or Stinger batteries as well.

FWIW: I went with a single Optima.