hhr06NJ

I got 7 years out of a Delco Battery... any suggestions?
what size battery should i get? ( amps etc?)

2006 model

RJ_RS_SS_350

Original is group 90, group 47 is a direct bolt in. Group 48 and 34R have been used, but you lose the hold down clamp on the end.
https://www.chevyhhr.net/forums/gene...ery-hhr-60294/

If you get a regular flooded battery, make sure to get a vent tube, if yours is missing or not reusable.

unknwn

I'm going to the Costco mid-week and getting the Interstate direct replacement. All the specs are the same, but, the CCA is 50 higher @ 650 CCA vs. the OE (and anyone else's replacement being a mere 600 CCA).
The warehouse club provide for a 3 year pro-rated warranty, along with the best price I could find for the -SAME- group 90 of $125 b4 tax & core.
Ask them to check the date of manufacture, my Costco has four(4) of them dated May, and two(2) that were displayed in February.

donbrew

Look more at the year than the month. I got one at Walmart that sat on the shelf for 4 years, lasted almost a year. Group 90 is not a popular size.

geg

Guys,
I used different ones - Korean, Japanese, Turkish, Russian batteries. And God knows what else.
The Japanese ones are very good, but probably not enough in the US, and probably expensive in the US.
Korean ones have been getting worse lately.
You won't find Russians - that's for sure, but you don't need to. Because good old AcDelco is better than any praise. You said the battery lasted 7 years - this is an excellent result. My AcDelco lived 9 years and I sincerely cried at the funeral. In Russia, buying this now is expensive (I give preference to the Tyumen manufacturer). But someday I will do it again.