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So, I have been daily driving my C7 since I installed this DieHard a little over a year ago I have left it in the garage without driving it for over a week at a time a couple of times and it's always started on the first try. Except last week.
I had to wait for a replacement meth pump for a week and left the car sitting during that week. When I tried to start it - nothing. Took a full day to recharge.
^^^
Only a few folks make batteries! Toured the Johnson Controls battery plant in town a few years ago. At the end of the line folks put on one of over 20 labels! One was DieHard. When I bought my AMG DieHard for my 2014 Z51 I also found the same battery under their on name by Advanced Auto and AutoZone in town. Sears was having a sale so bought it. Sold the 2014 and bought a Grand Sport. I'd buy an AGM battery from another in town for it when needed! Just look at the specs.
My "guess" is even if they go bankrupt they have some valuable trade names someone would buy, i.e. Craftsman, Diehard etc
^^^
Thanks- did not know it was sold. Knew someone would pick it up!
In my prior life, when our welding business became a leveraged buyout from a multinational corporation, as marketing VP I was responsible for protecting our ~25 Trademarks that came with the company. Since the business had to be sold in 5 years (we sold it for double the purchase price in 4) trademarks like Heliarc, Prest-O-Lite, Oxweld, Purox, Plasmarc, MigMaster, Digipulse, Ductling CNC Plasma cutter etc. were valuable assets for the new owner!
It says Lead Acid batteries only (Not for AGM or Gel Cell batteries)
AMG batteries are lead acid! No issues charging the AMG Diehard in my C7. Also use a standard lower cost "lead acid" battery charger for my old Optima Yellow Top AMG in it's 10 year life!
You can add the Walmart EverStart Platinum AGM H6 battery to the list of batteries
Originally Posted by JerryU
^^^
Only a few folks make batteries! Toured the Johnson Controls battery plant in town a few years ago. At the end of the line folks put on one of over 20 labels! One was DieHard. When I bought my AMG DieHard for my 2014 Z51 I also found the same battery under their on name by Advanced Auto and AutoZone in town. Sears was having a sale so bought it. Sold the 2014 and bought a Grand Sport. I'd buy an AGM battery from another in town for it when needed! Just look at the specs.
My battery was approaching 4 years old and sometimes cranking slow before starting. It checked out good but decided to replace it anyway. The Walmart EverStart Platinum AGM H6 was listed for the C7. It looks the same and has the same capacity ratings as the ACDelco/DieHard/Advanced Auto/Duralast/Super Start/Duracell/Exide AGM batteries. My guess is they are all made by Exide. Hopefully Walmart spec'd it out good.
Perfect fit right down to the vent tube (don't know why an AGM battery needs a vent tube - port may go nowhere). Even the positive terminal temporary plastic protector fit on my old battery.
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Perfect fit right down to the vent tube (don't know why an AGM battery needs a vent tube - port may go nowhere). Even the positive terminal temporary plastic protector fit on my old battery.
I checked that out as well as I have used an Optima in my C6 and have an Optima Yellow Top in my Street Rod and no vent. However the Marine industry requires a vent, AMG or not! This is why: When the battery is charged it like other batteries generates hydrogen. In the AMG it is usually absorbed BUT if charged excessively the hydrogen can build pressure. There is a bursting disk and if the pressure is high enough hydrogen can be released. Hence the vent.
I know this thread started out in '16, but I'm happy it got renewed as I didn't see it the first time out. Gotta bookmark this, one never knows. Thank you Jerry for taking the time to write this up. You've helped a lot of members.
FWIW, the NAPA 7548 battery is pretty much a dead ringer for the original AC Delco battery. It has vent pipe holes on both sides, and it has handles, which the original does not.
It got mine for the same price as the cheapest Group 48 DEKA battery I saw advertised on eBay, using the AAA discount at NAPA.
My 2014 C7 was starting to worry me -- it would always start well in my garage, but warm (re-)starts felt weak. This was the original battery, with around 20,000 miles on it and it never had a battery tender attached. So, I feel that it held up pretty well, but it was time for a new one.
R&R was relatively straightforward, though the place where it lives is tight. I ended up undoing all six 10mm & 13mm nuts that did the electrical contacts, removed the fuse holder, then undid the bracket nuts (10mm), disconnected the vent pipe (on the RR fender side), tilted the battery sideways, and pulled it out. Putting the new battery in was easier, as it has handles.
The first time I tried to start the car, there was a brief contact and then dead. Second time, fired right up, but the temperature sensor on the big display was not yet working. Third time, everything back to normal. I suspect this is what happens when you disconnect the battery.
Here's a pic of the new (on the left) and old (on the right) batteries. NAPA 7548 replacement Group 48 battery on the left, original AC Delco battery on the right.
10-17-2018, 12:09 AM
