: Delco battery date

05-12-12, 09:24 PM
I will be shopping for a new battery for my 2001 STS. The last one (a Delco) lasted 1 year - which pisses me off. In case I stick with Delco (see my other thread), is there a way to determine the manufacture date?

I found some OLD threads on this topic but I don't think they apply anymore.


05-15-12, 05:57 PM
The guy at the Delco shop explained the current numbering to me...so I'm posting for the interest of other members:

My battery is marked P121R which means:
P = Made in Pennsylvania
12 = Made in Dec (12th month)
1 = Made in 2011 (2010 + this digit)
R = no ideas...

05-16-12, 08:29 AM
Made in Pennsylvania - I wonder if that's an East Penn battery - Deka #779MF. They make batteries for a LOT of contracts.

05-21-12, 06:26 PM
save yourself some money and get one from Walmart -

seriously - 3 year FREE replacement - pro-rated to 7 years -
been using them for years -
one defective one - replaced for free after 2 years of use -