I had this discussion with bartonmd on the FB group earlier today and he provided a few options for battery replacement upgrades over what we have from GM. As you guys may know, the 1.8/1.4T battery tray is adjustable and has plenty of room left for a bigger battery.
Here are the specs for the OEM
H5/47 group size, from an AutoCraft Gold battery:
520 Cold cranking amps
Weight: 45 lbs
The following two group sizes fit in our battery trays. Here are the specs I found for the Advance Auto AutoCraft Platinum AGM battery. I strongly recommend any AGM battery. I've posted the differences over the OEM battery (assuming the AutoCraft Gold is equivalent or similar) in bolded green. The CCA specs and prices will vary slightly but not by a whole lot.
760 Cold cranking amps (+240 CCA = +46%)
Weight: 45.66lbs (+0.66lbs = +1.5%)
Price: $174.99 (+$13 = +8%)
850 CCA (+330 CCA = +63%)
Weight: 51.83lbs (+6.83lbs = +15%)
Price: $187.99 (+$26 = +16%)
Here is what the OEM H5 battery looks like in the battery tray:
Here is what the H6/48 battery looks like in the battery tray:
Here's a picture of the H7/94R battery in the Cruze:
Remember, if you have an Advance Auto Parts store near by, there is almost always a 30% coupon available that will knock $50 off the price of a battery. Order online to pick up in store.