RS battery comparison
#1
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I don't know if posted before, but here is a comparison between 993 70 ampere-hr battery and 993 RS 36 ampere-hour battery.
RS battery WITHOUT electrolyte = 19.2 pounds
993 normal battery WITH electrolyte = 40.6 pounds
Looks like around a 20 pound weight saving with an RS battery.
Don't drive around with A/C on, headlights on, fog lights on, rear window defogger on, stereo on, etc. or you will be left for dead with an RS battery - particularly if you have an RS fan drive as well.
[IMG]
[/IMG]
[IMG]
[/IMG]
RS battery WITHOUT electrolyte = 19.2 pounds
993 normal battery WITH electrolyte = 40.6 pounds
Looks like around a 20 pound weight saving with an RS battery.
Don't drive around with A/C on, headlights on, fog lights on, rear window defogger on, stereo on, etc. or you will be left for dead with an RS battery - particularly if you have an RS fan drive as well.
[IMG]
![](http://i541.photobucket.com/albums/gg368/Cupcar/RSbatttop.jpg)
[IMG]
![](http://i541.photobucket.com/albums/gg368/Cupcar/RSbattsideview.jpg)
#2
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Interestingly enough you tend to find that many RS come equipped with option M197 = Uprated battery.
This was a default option if you selected a/c (573).
The build sheet on my own RS CS comes with 197.
This was a default option if you selected a/c (573).
The build sheet on my own RS CS comes with 197.
#4
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Last time I filled one, I didn't use the entire 850 cc in the acid pack. Let's say I did, then correcting for specific gravity 850 cc X 1.275 = 1083 grams = 2.38 pounds.
19.2 + 2.38 = 21.6 pounds for RS battery, if it takes 850 cc of acid.
So 40.6 - 21.6 = 19 pounds saving.
So you are right, it is not 20 pounds, but I did use the qualifier "around" and did site with and without electrolyte in my posted weights.
#5
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I plan on using both depending on weather. I suspect your RS has the 8 mm threaded hole under the battery for the extra bracket required to restrain the RS battery.
#6
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I am deleting everything except for the headlights, but I do want to run a electric pump for the power steering. Not sure if the RS pulley is a good idea even if keep the bigger battery.