R/R question

[NiceGuysFinishLast]

Just charged up my new battery, got it in the GS, she starts first try now, which is great. However, when I run her up to about 7.5K, I pull 12.8V across the terminals. That seems a tad low to me, but I'm not sure. How does that sound to you gurus?

[Affschnozel]

My GS at 5k gives out around 13v and so is another GS I tested
I never seen my charging reach 15v as suggested in Haynes manual

[NiceGuysFinishLast]

Awesome, so I'm at least close to the norm. I just wanted to be sure it really was a battery issue (I was 99% sure, since the old battery was sulfated all to hell, and dry as a bone. Like, dry enough that I didn't even bother adding water to see if it would come back to life)